Height-based single tree
Input
DBH 35 cm / height 18 m / wood density 0.62 g/cm3 / height-based preset
Output
AGB ≈ 732.08 kg, carbon ≈ 344.08 kg C, CO2e ≈ 1,261.61 kg
Forestry field estimate
Forest biomass and carbon estimator
Estimate above-ground biomass, carbon, and CO2e in your browser from DBH, tree height, wood density, and species group.
Start from built-in reference equations, save your own coefficient sets, and fall back to DBH-only estimates when field data are incomplete.
Built-in equations plus a custom preset you can save
Use a DBH + density or DBH-only fallback when height is missing
Optional BGB with root/shoot ratio defaults
Share by URL and export JSON or CSV
Reference values only; not for formal carbon reporting.
How to use
- Choose the estimate mode, species group, and preset, then confirm that the built-in values fit your local workflow.
- Enter DBH first, then add tree height and wood density when the selected mode needs them.
- Turn on root biomass if you need BGB, then choose a preset, species-specific, or custom carbon fraction.
- Review the result, then copy it, share the URL, or export JSON and CSV for reuse.
Examples
DBH + density fallback
Input
DBH 35 cm / wood density 0.62 g/cm3 / DBH + density preset
Output
AGB ≈ 228.71 kg, carbon ≈ 107.49 kg C, CO2e ≈ 394.14 kg
Multi-tree plot sample
Input
Three trees: 24 cm / 14 m / 0.58, 26 cm / 15 m / 0.59, 28 cm / 16 m / 0.60, plot area 0.05 ha
Output
Total AGB ≈ 992.62 kg, carbon ≈ 466.53 kg C, CO2e ≈ 1,710.62 kg, or 19.85 t/ha
Formulas
Before the selected equation runs, inputs are normalized to cm, m, g/cm³, kg, and t.
- AGB = a × (rho × D^2 × H)^b
- AGB = a × rho^c × D^b
- AGB = a × D^b
- BGB = AGB × root/shoot ratio
- Carbon = total biomass × carbon fraction
- CO2e = carbon × 44 / 12
Glossary
DBH
Diameter at breast height, measured at 1.3 m or your local standard.
AGB
Above-ground biomass. This page reports it as the main biomass result.
BGB
Below-ground biomass. It is optional and uses a root/shoot ratio when enabled.
Wood density
Basic wood density or specific gravity used to calibrate the model.
Carbon fraction
The share of biomass assumed to be carbon; this tool defaults to 0.47.
Root/shoot ratio
A multiplier used to estimate BGB from AGB when root biomass is turned on.
CO2e
Carbon dioxide equivalent. Carbon is multiplied by 44/12 to convert to CO2e.
Frequently asked questions
Can I use this for formal carbon reporting?
No. Use this page for field estimates and quick planning, not for certified reporting or audit work.
What if tree height is missing?
Switch to the DBH + density or DBH-only preset. The estimate can continue when height is unavailable.
Can I type decimal commas?
Yes. Enter either decimal commas or decimal points, along with simple unit suffixes.
Can I save my own coefficients?
Yes. Save a custom preset in this browser, then export it as JSON if you want a portable copy.
Does the page send my data to a server?
No. Inputs, presets, and results stay in the browser unless you explicitly copy or share them.
Important notes
- Built-in equations are reference values only. Replace them with approved local coefficients when available.
- Wood density, carbon fraction, and root/shoot ratio can vary by species, site, and data source.
- Root biomass is optional. Leave it off if you only need AGB.
- Per-hectare values depend on the plot area you enter. The page does not infer stand area.
- Do not put private stand names in share URLs if they should remain private.