Biomass Calculator

Free Biomass Calculator — estimate plant biomass from area and biomass density, or from total mass and dry-matter percentage.

871.8K uses Updated · 2026-05-12 Runs locally · zero upload
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How to Use Biomass Calculator

The Biomass Calculator converts plot area and biomass density into total biomass, then optionally returns dry biomass.

  1. Enter area — In hectares or square meters.
  2. Enter biomass density — t/ha or kg/m². Typical: maize 18 t/ha, grassland 4 t/ha, temperate forest 250 t/ha.
  3. Enter dry-matter percentage — Use 100 % if you only want fresh weight.
  4. Read the result — The Biomass Calculator returns total fresh and dry biomass in tonnes and kilograms.

Formula & Theory — Biomass Calculator

Biomass_fresh = Area × Density
Biomass_dry   = Biomass_fresh × DM%
SymbolMeaning
AreaLand area (ha or m²)
DensityBiomass per unit area (t/ha or kg/m²)
DM%Dry-matter percentage

Assumptions and Limits

The Biomass Calculator assumes uniform density across the plot. Real-world stands have variation; field sampling is needed for high-precision inventories.

Use Cases for Biomass Calculator

  • Agronomy — Estimate harvestable yield for crops or pastures.
  • Forestry — Approximate above-ground tree biomass and carbon stock.
  • Bioenergy — Plan feedstock supply for biogas or biomass power.
  • Education — Connect land area to ecosystem productivity.

The Biomass Calculator is a practical first step toward biomass and carbon assessments.

Frequently asked questions about Biomass Calculator

How accurate is the Biomass Calculator?

The Biomass Calculator uses simple linear relationships, so accuracy depends on the density or moisture values you supply. Standard agronomy and forestry tables provide reliable inputs.

When should I use a Biomass Calculator?

Use the Biomass Calculator to estimate crop yield potential, forest carbon stock, or feedstock available for bioenergy projects.

Can it handle dry biomass too?

Yes. The Biomass Calculator multiplies wet mass by the dry-matter fraction to give dry biomass, which is the standard reporting basis.

Is my data stored?

No. All calculations happen in your browser; nothing is sent to a server.