Tree Yield and Revenue Calculator: Calculate Timber Volume, Heartwood Weight & Agroforestry Income.

Introduction: The Tree in Your Field Has a Price. Do You Know It?

There is a teak tree standing at the corner of a farm in Vidarbha. It has been growing for eighteen years. The farmer planted it when his son was born partly as a long-term investment, partly out of habit, because his father had done the same thing. Every monsoon it grows taller. Every summer he looks at it and wonders: how much is it worth today?

He has no idea.

Not because the information does not exist but because nobody has ever given him a simple, free tool to calculate it. The timber merchant who visits the village gives a price after examining the tree with his eye. The farmer accepts it because he has nothing to compare it against. He does not know the girth, the trunk length, the volume in cubic feet, the heartwood percentage, or how the price compares to the current market rate. He just knows what he was offered.

This is the situation for hundreds of millions of farmers and landowners worldwide who grow trees on their land as agroforestry investments, as boundary plantations, as timber rotations alongside food crops, or simply as trees that have been growing for years and now have real market value. They are sitting on wealth they cannot measure.

I built the Tree Yield and Revenue Calculator on MoralInsights.com specifically for these farmers and landowners. It is the only free global tool that combines the Hoppus Quarter Girth timber volume formula, heartwood weight calculation for sandalwood and agarwood, bamboo tonnage estimation, and fruit tree lifetime yield projection across 20 tree species, 10 currencies, metric and imperial units, and markets from India to Kenya to Brazil to the United States.

You take two measurements from your tree. The calculator does everything else.

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Why Calculating Tree Value Is One of the Most Financially Important Skills in Agroforestry

Trees are among the most significant long-term agricultural investments a farmer can make and also among the most poorly understood in terms of their financial value. Unlike crops that are priced, weighed, and sold every season, trees accumulate value silently over years and decades. Most farmers have no systematic way to track or estimate that value until the moment a buyer arrives.

The Food and Agriculture Organization of the United Nations reports that agroforestry systems which integrate trees with crops and livestock cover approximately 1 billion hectares worldwide and support the livelihoods of over 1.2 billion people. Their comprehensive resources on agroforestry and tree-based farming systems are available at https://www.fao.org/agroforestry/en/. The FAO consistently documents that farmers who understand and can calculate the value of their tree assets make significantly better decisions about when to plant, when to harvest, and what species to grow.

The World Agroforestry Centre (ICRAF), now known as the World Agroforestry programme of CIFOR-ICRAF, has published extensive research showing that agroforestry can increase farm household income by 25 to 75 percent when trees are selected and managed with financial planning rather than by tradition alone. Their research is available at https://www.worldagroforestry.org/.

The financial stakes are enormous. A single mature teak tree with a trunk volume of 12 cubic feet commands ₹36,000 to ₹48,000 in the Indian market. A 15-year-old sandalwood tree with good heartwood development can yield ₹3 to ₹6 lakh of heartwood income from a single tree. A bamboo plantation of 500 clumps can generate ₹2.5 to ₹5 lakh every three years indefinitely from the same root system. A mature avocado tree in Kenya yielding 120 kg per year at KSh 80 per kg generates KSh 9,600 per tree per year meaning 200 trees represent KSh 1.9 million in annual income.

These are not hypothetical numbers. They are the real financial value sitting in fields and farm boundaries around the world that farmers cannot access because they cannot measure it. This calculator exists to change that.

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What the Tree Yield & Revenue Calculator Calculates

This calculator has four distinct calculation engines built for four different tree types. Here is every output and what it means.

For Timber Trees (Teak, Mahogany, Walnut, Oak, Rosewood, Pine, Poplar, Gmelina, Acacia, Neem, Paulownia):

The tool calculates timber volume using the Hoppus Quarter Girth Formula the internationally recognised standard for log volume measurement used in India, the United Kingdom, Southeast Asia, and most timber-trading markets worldwide. From two simple measurements girth and trunk length it gives you the volume in cubic metres, cubic feet, and board feet (for American markets), plus estimated green weight in tonnes.

It then splits your total volume into heartwood and sapwood based on the percentage you enter. For premium timber species like teak and rosewood, the heartwood percentage dramatically affects the price buyers pay significantly more per unit for high-heartwood logs. The tool shows both the heartwood volume and its revenue contribution separately.

The harvest readiness indicator shows a visual progress bar of your tree’s maturity against its recommended harvest age range, with a status of Ready to Harvest, Approaching Harvest, or Still Growing. This single indicator tells you whether it is financially optimal to sell now or wait.

Gross revenue is calculated as volume multiplied by your entered market rate. Net income subtracts your entered costs for felling labour, transport, permits, and other deductions to show your actual take-home.

For Heartwood Trees (Sandalwood, Agarwood / Oud):

Sandalwood and agarwood are not sold by volume they are sold by the weight of their heartwood in kilograms. The tool calculates total tree weight from girth and height using the cylinder formula and wood density, then separates heartwood from sapwood using your entered percentage. It shows heartwood revenue, sapwood revenue, and total income with separate pricing for each because heartwood and sapwood carry completely different market values for these species.

For Bamboo:

Bamboo is calculated by the clump the number of culms (poles), their dimensions, and their green weight. The tool estimates total green tonnage per clump per harvest cycle, converts to dry tonnage, and multiplies by your entered rate per tonne. It also shows how many days until the next harvest is due, and explains bamboo’s unique financial advantage: unlike trees, bamboo regenerates from the same root system every two to three years, giving it the income profile of a crop rather than a one-time asset.

For Fruit, Rubber, and Yield Trees (Mango, Coconut, Avocado, Rubber):

These trees are valued by annual yield multiplied by price and productive lifespan giving a lifetime income projection per tree. The tool calculates gross annual revenue, net annual income after input costs, remaining productive years, total lifetime income, and the additional end-of-life timber value when the tree is eventually felled.

Farm Income Projector:

The second tab allows you to enter multiple tree species with different quantities, volumes, rates, and harvest years giving you a complete farm income projection table that shows total income by species and a year-by-year harvest timeline. This is the tool for farmers planning a mixed agroforestry operation or managing an existing multi-species plantation.

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What Does the Calculator Ask You to Enter?

The inputs are minimal and based entirely on measurements you can take in your field with a simple measuring tape.

Region and Currency: Select from 10 regions India (₹ INR), USA ($ USD), Europe (€ EUR), UK (£ GBP), Australia (A$ AUD), Brazil (R$ BRL), East Africa (KSh KES), West Africa (₦ NGN), Southeast Asia (Rp IDR), China (¥ CNY), or Custom. Market rates for all 20 species auto-fill in your selected currency when you choose your region.

Measurement System: Choose Metric (centimetres, metres, kilograms, cubic metres) or Imperial (inches, feet, pounds, cubic feet). The calculator converts between systems internally a farmer in India using centimetres and a timber trader in the USA using inches both get equivalent results in their preferred units.

Tree Species: Select from 20 species across five categories Premium Timber (Teak, Mahogany, Walnut, Rosewood, Oak, Pine), Fast-Growing Timber (Eucalyptus, Poplar, Gmelina, Acacia, Paulownia), Special Value (Sandalwood, Agarwood), Bamboo, and Fruit/Yield Trees (Mango, Coconut, Avocado, Rubber, Neem). Each selection automatically adjusts the input fields, market rates, and calculation formula for that species type.

Girth (Circumference): The circular measurement around the tree trunk at breast height 1.37 metres or 4.5 feet above the ground. This is the universal standard measurement height used in all timber volume formulas worldwide. Measured by wrapping a measuring tape around the trunk.

Trunk Length (Marketable Length): The length of the straight, branchless section of the trunk from the base to the point where the first major branches diverge. This is not the total tree height only the commercially usable straight section is measured because the upper branchy portions have much lower or no timber value.

Tree Age: Enter the current age of your tree. The calculator uses this to assess harvest readiness against the species’ recommended harvest window showing you whether the tree is at peak value, approaching its harvest window, or still developing.

Market Rate: The current local price per cubic metre, cubic foot, board foot, kilogram, or tonne for your tree species. The calculator auto-fills an indicative rate based on your selected region, but you should verify and update this with your local timber depot, forest department auction schedule, or buyer’s current offer before making any decisions.

Heartwood Percentage: For timber and heartwood species, enter the estimated proportion of heartwood (inner dark wood) to total volume. This is critical for high-value species like teak and sandalwood where heartwood commands premium pricing. The percentage naturally increases with tree age a 15-year teak may have 60% heartwood while a 25-year teak may have 75%.

Costs and Deductions: Enter felling and labour costs, transport costs, permit and royalty fees, and any other deductions. These are subtracted from gross revenue to show your actual net income the number that matters for financial planning.

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What Makes This Calculator Practically Useful

The Hoppus Quarter Girth Formula is used by timber merchants, forest department officers, and buyers worldwide but most farmers have never been shown how to apply it. This calculator makes that professional-grade calculation available to any farmer with a smartphone and a measuring tape.

The automatic heartwood-sapwood split is a feature that directly addresses one of the most common ways farmers lose money in timber sales. When a buyer inspects a teak tree and quotes a price, they are mentally estimating heartwood percentage and discounting accordingly. A farmer who independently knows that their tree has 65% heartwood can verify whether the offered price fairly reflects that composition or is discounted below market rate.

The ten-currency support with auto-filled market rates makes this tool genuinely global. A coconut farmer in the Philippines, a teak investor in West Africa, a walnut grower in the USA, and a sandalwood farmer in Karnataka are all using the same calculator but seeing market rates that reflect their actual local markets in their own currency.

The farm income projector on the second tab is a planning tool unlike anything available for free in the agroforestry sector. It lets a farmer visualise the total income from their entire tree portfolio not just one tree and see which species will generate income in which years. For farmers who have planted multiple species in different years across different blocks, this year-by-year cash flow picture is invaluable for planning farm expenses, loan repayments, and investment decisions.

The species reference table on the third tab is a searchable database covering 19 species with harvest age, typical volume, sale unit, global price range in USD, primary use, and key growing regions making it a complete agroforestry investment reference guide in its own right.

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Who Benefits Most from This Calculator?

Farmers with boundary or bund plantations: Across India, millions of farmers have trees planted along the boundaries and embankments of their fields teak, eucalyptus, acacia, neem, and other species that have been growing for years. Most have never calculated the value of these trees. This calculator lets them do a complete farm-wide inventory and valuation in under an hour.

Agroforestry investors in India: The interest in teak and sandalwood as long-term investments has grown significantly over the past decade. Investors who planted teak or sandalwood 10 to 15 years ago now face the question of whether to harvest or wait and at what price. This calculator gives them the volume and revenue estimate they need to evaluate that decision against current market rates.

Bamboo farmers across Asia and Africa: Bamboo farming has emerged as a significant income source in India, China, Bangladesh, Kenya, and Ethiopia. Bamboo farmers need to know their tonnage per clump and income per harvest cycle to manage their rotation schedules and cash flow. No existing free tool covers this calculation properly.

Rubber and coconut farmers in Southeast Asia and South India: These are annual-yield trees with lifetime income profiles that most farmers have never calculated holistically. Knowing that a rubber tree on your plot will generate the equivalent of a specific total lifetime income helps farmers make rational decisions about replanting, diversification, and end-of-life timber sales.

Avocado farmers in East Africa and Latin America: Avocado has become one of the most financially significant tree crops in Kenya, Tanzania, Ethiopia, and across Latin America. Farmers need to project lifetime income to make rational investment decisions about expansion, variety selection, and market access.

Timber traders and forest valuation officers: This calculator provides a rapid cross-check tool for on-site timber valuation useful for preliminary estimates before formal measurement or auction.

Agricultural students and agroforestry researchers: The transparent implementation of the Hoppus formula, cylinder volume calculation, and wood density-based weight estimation makes this an excellent teaching resource for forestry and agriculture courses.

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Step-by-Step: How to Use the Tree Yield & Revenue Calculator

Let me walk through three complete examples one timber tree, one sandalwood tree, and one farm projector scenario.

Example 1 Teak Tree in Karnataka, India

Scenario: Rajan has a 17-year-old teak tree on his farm boundary in Dharwad district. He measures the girth at breast height and gets 132 cm. The straight trunk length before the first branch is 9 metres. Local timber merchants have quoted ₹2,800 per CFT recently. He expects felling and transport will cost ₹3,000.

Step 1 Select Region: India (₹ INR). Currency symbol updates throughout.

Step 2 Select Measurement System: Metric.

Step 3 Select Tree Species: Teak (Sagwan). Market rate auto-fills to ₹3,000/CFT. Heartwood auto-fills to 65%.

Step 4 Enter Girth: 132 cm.

Step 5 Enter Trunk Length: 9 metres.

Step 6 Enter Tree Age: 17 years.

Step 7 Adjust Market Rate: Change to ₹2,800 (current local rate).

Step 8 Enter Costs: Felling ₹2,000 + Transport ₹1,000 = ₹3,000 total.

Step 9 Click Calculate Revenue.

What happens internally using Hoppus Formula:

• Quarter Girth: 132 ÷ 4 = 33 cm
• Volume: (33 × 33 × 9) ÷ 10,000 = 0.98 m³
• In CFT: 0.98 × 35.31 = 34.6 CFT
• Heartwood volume: 0.98 × 0.65 = 0.637 m³
• Rate per m³: ₹2,800 × 35.31 = ₹98,868/m³
• Gross revenue: 0.98 × ₹98,868 = ₹96,890
• Net income: ₹96,890 − ₹3,000 = ₹93,890

Results Rajan sees:

• Volume: 0.98 m³ / 34.6 CFT / 415 Board Feet
• Gross Revenue: ₹96,890
• Net Income: ₹93,890
• Harvest Status: Ready to Harvest (harvest window 15–20 years)

Rajan now knows his tree is worth approximately ₹93,890 net. The merchant’s last offer was ₹72,000. He now has the confidence and the numbers to negotiate or to wait two more years as the tree’s volume and heartwood percentage increase further.

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Example 2 Sandalwood Tree in Andhra Pradesh, India

Scenario: Lakshmi has a 14-year-old sandalwood tree on her 2-acre farm. The girth is 72 cm. The tree is approximately 5.5 metres tall. She wants to know its heartwood value before the Forest Department officer visits for assessment.

Step 1 Select Region: India (₹ INR).

Step 2 Select Tree Species: Sandalwood (Chandan). This automatically shows the heartwood section with separate heartwood and sapwood pricing. Rate auto-fills to ₹8,000/kg heartwood, ₹100/kg sapwood.

Step 3 Enter Girth: 72 cm.

Step 4 Enter Height: 5.5 metres.

Step 5 Enter Tree Age: 14 years.

Step 6 Enter Heartwood Percentage: 28% (appropriate for 14-year tree).

Step 7 Click Calculate Revenue.

Results:

• Total Trunk Volume: approximately 0.29 m³
• Total Weight: approximately 261 kg (at 900 kg/m³ density)
• Heartwood: 261 × 0.28 = 73 kg at ₹8,000/kg = ₹5,84,000
• Sapwood: 261 − 73 = 188 kg at ₹100/kg = ₹18,800
• Total Revenue: approximately ₹6,02,800

Lakshmi now knows that her single sandalwood tree has an estimated market value of over ₹6 lakh entirely from heartwood income. She can use this figure when negotiating with the forest department or licensed buyers, and she understands exactly why heartwood percentage matters so much for sandalwood pricing.

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Example 3 Farm Income Projector: Mixed Agroforestry Farm

Scenario: Emmanuel in Kenya manages a 3-acre mixed agroforestry farm. He has 50 teak trees (8 years old), 200 eucalyptus trees (4 years old), 30 avocado trees (3 years old), and 100 bamboo clumps (2 years old).

He goes to the Farm Projector tab and adds four rows:

Species	Trees	Volume/Tree	Rate	Harvest Year
Teak	50	10 CFT	KSh 3,500/CFT	Year 12
Eucalyptus	200	0.8 tonne	KSh 4,500/tonne	Year 7
Avocado	30	80 kg/yr × 20 yrs	KSh 60/kg	Annual
Bamboo	100 clumps	1.5 tonne	KSh 8,000/tonne	Year 4

Farm Projector Results:

• Teak (Year 12): KSh 1,750,000
• Eucalyptus (Year 7): KSh 720,000
• Avocado (Annual): KSh 144,000/year × 20 years = KSh 2,880,000
• Bamboo (Year 4, recurring): KSh 1,200,000 per harvest
• Total Projected Farm Revenue: KSh 6,550,000+

The year-by-year breakdown shows Emmanuel exactly when cash will arrive bamboo in year 4, eucalyptus in year 7, teak in year 12, with avocado income every year from year 5. This is genuine farm financial planning.

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Related Tools on MoralInsights.com

These tools on MoralInsights complement the Tree Yield & Revenue Calculator for complete agroforestry farm management:

• Fruit Trees & Agroforestry Carbon Credit Calculator– Trees not only produce timber and fruit they sequester carbon. Use this calculator to estimate the additional carbon credit income your agroforestry system can generate on top of timber revenue.
• Farmer Profit & Loss Calculator– Combine your tree income projections with crop income and input costs for a complete whole-farm profit and loss picture.
• Irrigation & Fertigation Calculator– For intensively managed fruit orchards and agroforestry systems with irrigation, calculate precise water and fertilizer delivery through drip systems.
• Soil pH Corrector Calculator– Most timber and fruit trees require specific soil pH ranges for optimal growth. Correct your soil before planting to maximise long-term yield.
• Subsidy Calculator for Farmers– Many countries offer subsidies for agroforestry planting, including India’s National Agroforestry Policy. Calculate your eligibility and net investment cost.
• Crop Yield Calculator– For mixed agroforestry systems where food crops grow alongside trees, estimate your annual crop income to complement your tree income projections.

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Frequently Asked Questions

Q1: What is the Hoppus Quarter Girth Formula and why does it give less than the true volume?

The Hoppus formula was developed in the 18th century by Edward Hoppus, a British timber merchant, as a practical way to estimate the usable timber in a round log without complex mathematics. It divides the girth by 4 to get the quarter girth, squares it, and multiplies by length giving a volume that is approximately 78 percent of the log’s true geometric volume. The 22 percent difference is an intentional, built-in deduction that accounts for the bark, the natural taper of the log, the irregular cross-section of a real tree trunk, and the waste generated during sawing.

In timber markets, buyers pay for usable timber not the theoretical full cylinder. This is why the Hoppus formula has remained the standard for over 200 years: it gives both buyer and seller a consistent, conservative, honest number for the tradeable commodity.

Q2: Why do I measure girth at 1.37 metres (4.5 feet) from the ground?

This height known as Diameter at Breast Height or DBH was established as an international standard so that measurements taken by different people in different countries and at different times are directly comparable. At this height, the trunk measurement is unaffected by butt swell at the base but is still representative of the main trunk volume. Using a consistent measurement height is essential for forest inventories, timber trade, and carbon accounting. The calculator uses this standard so your results are compatible with timber merchants, forest department assessments, and international market comparisons.

Q3: My sandalwood is only 10 years old. Is it worth selling now?

Almost certainly not and the calculator will show you why. At 10 years, a sandalwood tree typically has only 15 to 20 percent heartwood. At 15 years, that rises to 25 to 35 percent. At 20 years, a well-grown tree can have 40 to 50 percent heartwood. Since heartwood is sold at ₹6,000 to ₹10,000 per kg and sapwood at a tiny fraction of that, the income difference between a 10-year harvest and a 15-year harvest is enormous often three to four times more total revenue for waiting just five more years.

Run both scenarios through the calculator enter 10 years with 18% heartwood and again with 15 years and 32% heartwood and the financial case for patience becomes immediately visible.

Q4: Can I use this calculator for trees I have not planted yet to decide which species to invest in?

Yes, and this is one of the most valuable uses of the tool. Enter the expected volume per tree from the Species Reference table on Tab 3, your local indicative market rate, and the species’ typical harvest age. The calculator will show you the expected revenue per tree at maturity. You can then compare, for example, the 15-year teak return against the 7-year eucalyptus return and the 5-year bamboo rotation return in your local currency making the species selection decision based on projected financial return rather than on tradition or a dealer’s recommendation.

Q5: The market rate in my area is very different from what the calculator auto-fills. Does this affect accuracy?

Yes the market rate is the single most important variable in the revenue calculation. The auto-filled rates are indicative regional averages based on 2025–2026 market data and should be treated as a starting point only. Before making any harvesting or investment decision, always verify the current rate with your local timber depot, the state forest department’s timber auction schedule, certified timber valuers, or direct buyers. Timber prices fluctuate significantly based on log grade, heartwood percentage, moisture content, accessibility, and local demand. The calculator gives you the volume and weight calculation with full scientific accuracy but the price discovery requires local market verification.

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Conclusion

Every tree standing on your land right now has a calculable value. Whether it is a row of teak along your farm boundary that you planted fifteen years ago, a sandalwood tree you have been watching grow for a decade, a bamboo plantation ready for its first harvest, or a mango orchard entering its peak productive years the number exists. You just need the right formula and the right market rate to find it.

The Tree Yield & Revenue Calculator gives you both. It puts professional-grade timber volume calculation, heartwood weight estimation, and agroforestry income projection into your hands for free in your language, your currency, and your units so you walk into every timber sale, every farm planning decision, and every agroforestry investment with the same information that buyers and merchants have always had.

That information is yours. It always was.

Calculate the value of your trees today at MoralInsights.com and never again accept a price without knowing the number first.

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Disclaimer

The timber volumes, heartwood weights, yield projections, and revenue estimates produced by the Tree Yield & Revenue Calculator are approximate estimates intended for educational and planning purposes only. All calculations use standard international formulas (Hoppus Quarter Girth, cylinder volume, wood density) applied to the measurements entered by the user.

Actual timber value depends on log grade, straightness, taper, knots, cracks, moisture content, species certification, market conditions at time of sale, and buyer assessment. The Hoppus formula gives approximately 78 percent of true log volume by design this is the standard for timber trade, not a limitation of the calculator.

Market rates shown are indicative 2025–2026 estimates based on publicly available regional market data. Actual prices vary significantly and are subject to change. Always verify current market rates with local timber merchants, forest department auction schedules, or certified timber valuers before making harvest or investment decisions.

Legal Requirements: In many countries, felling trees including trees on private land requires a permit or transit pass from the Forest, Environment, or Revenue Department. In India, species including sandalwood, rosewood, and others are subject to state-level felling and transport regulations. Agarwood (Oud) is listed under CITES Appendix II and its international trade is strictly regulated. MoralInsights.com does not provide legal advice. Always consult your local forest department or legal advisor before harvesting.

MoralInsights.com accepts no liability for commercial decisions made on the basis of this calculator’s outputs.

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About the Author

This calculator and article were created by Lalita Sontakke, Founder and Lead Author of MoralInsights.com.

Lalita built MoralInsights.com on the belief that every farmer whether they manage a small kitchen garden or a large commercial agroforestry farm deserves access to the same quality of scientific tools and market knowledge that has historically been available only to large corporations, timber merchants, and those with professional advisors.

The Tree Yield & Revenue Calculator is one of the most technically complex tools on the platform, implementing four distinct calculation methodologies Hoppus Quarter Girth for timber volume, cylinder-density calculation for heartwood weight, hollow cylinder estimation for bamboo, and lifetime yield projection for fruit trees across 20 species, 10 currencies, and two measurement systems. It is genuinely the most comprehensive free agroforestry income calculator available anywhere in the world.

MoralInsights.com now offers 53+ free agricultural calculators across seven categories, serving farmers, agronomists, students, and home gardeners across India and worldwide. Zero signup. Zero cost. Zero compromise on accuracy.

“Farming decisions should never be limited by access to information.” Lalita Sontakke

Explore all 53+ free tools at www.moralinsights.com