Quantification Tool

Estimate your project's carbon credit generation

Enter your project parameters. The live output panel updates as you type, and you can compare all major methodologies on the results page.

Standard & feedstock

Carbon standard ? The carbon standard chosen will affect the calculation, as each standard uses slightly different calculation methods and default values.

Feedstock type ? Selecting a feedstock type provides suggested values for feedstock moisture content and biochar carbon content.

Feedstock tonnage (t/yr) ? The amount of feedstock that will be converted into biochar via pyrolysis.

Moisture incoming ? The moisture content of the feedstock at the point of harvest, before processing.

Moisture to pyrolyser ? The moisture content of the feedstock when inserted into the pyrolyser. If unsure, use the default value of 0.15.

Pyrolysis & production

Pyrolysis unit ? This will affect the conversion rate from feedstock to biochar.

Pyrolysis process ? This changes the suggested carbon content used in calculations.

Temperature ? Used in some methodologies to calculate the permanence of biochar.

H/Corg ratio of biochar ? Molar hydrogen to organic carbon ratio, from a lab test. Used by most methodologies to calculate permanence. Lower is more stable.

Carbon content ? A critical characteristic of biochar used to determine carbon sequestration.

Conversion rate ? Alters the rate at which dry feedstock is converted into biochar.

Application & project

Soil temperature (°C) ? Used to calculate permanence of biochar for some methodologies.

Project lifetime (yrs)

Permanence override ? Insert a permanence factor here if you have pre-calculated a permanence value and would prefer to use it in place of the calculated value.

Deductions

Project emissions (tCO₂e / t biochar) ? Emissions from plant operations, feedstock processing, and start-up. Deducted per tonne of biochar produced. Zero unless you enter a value; the live output panel shows the selected standard's suggested value and its source.

Leakage emissions (tCO₂e / t biochar) ? Indirect emissions caused by the project, such as market or activity-shifting leakage from feedstock diversion.

Counterfactual emissions (tCO₂e / t biochar) ? Emissions that would have occurred without the project, e.g. from alternative feedstock disposal. Deducted per tonne of biochar produced.

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Results

Quantification results

Estimated carbon sequestration based on your inputs. Figures are indicative. Formal verification requires third-party assessment.

Annual carbon credits (average over project life)

–

tCO₂e / year

Total credits

–

tCO₂e over project life

Biochar produced

–

t / year (full capacity)

Net (annual) at full capacity

–

tCO₂e / yr

Credits per year (tCO₂e)

Breakdown at full capacity

Dry feedstock processed (annual)–

Biochar produced at full capacity–

Gross carbon sequestered–

Project emissions (annual)–

Leakage emissions (annual)–

Net credits at full capacity (annual)–

Dashboard

Project setup

Project region ?The geographic region affects baseline leakage rates and applicable allometric defaults.

Project length (years)

Total hectares ?Total area under the project boundary across all planting years.

Number of species

Pre-existing land type ?Sets the performance benchmark rate applied to the area-based chain - the growth the control area would have shown anyway. Not applicable to census-scaled species.

Benchmark custom override (%) ?Optional. Overrides the land-type benchmark with your own rate. Leave blank to use the land type; an entered 0 is a real 0%.

Deductions

Buffer (non-permanence) ?Share of credits held back against reversal risk, applied to both accounting chains. The real figure comes from the digital AFOLU NPRT at validation. 20% is an assumed planning figure; the minimum is 12% and projects rated above 60% are ineligible (NPRT Procedure v5.0 s.2.5.2 to 2.5.3).

Uncertainty ?Deduction for estimation error. VM0047 v1.1 Eq. 28 only deducts uncertainty above a 10% allowance, so 10% here is a conservative assumption for forecasts before monitoring, not a requirement. 0% fits once monitored sampling error is within the allowance.

Leakage ?Displacement of pre-project land use outside the boundary (not the performance benchmark). Applied to gross removals accrued in years 1 to 3. Rate source: VCS Standard v5.0 Section 3.14.13.

Project emissions (excl. harvest)

Pesticides used? ?If yes, 0.094 tCO₂e per hectare is added to project emissions for area-based species.

Fertiliser ?Applications land in years 1, 3 and 8 of each cohort. Moderate matches a registered project's establishment application; Intensive its full rotation. Emissions follow the VM0047 v1.1 N₂O chain (about 5.894 tCO₂e per Mg N).

Site preparation clearing ?Carbon stock of vegetation cleared, emitted in each cohort's planting year, and the share of the area cleared. Herbaceous cover is about 1 tCO₂e/ha fully cleared and usually de minimis; woody scrub can be tens of tCO₂e/ha.

Species configuration

Common name

Coverage (%) ?Percentage of total project area planted with this species. All species must sum to 100%.

Starting stems / ha

Scaled by ?If you are unsure which approach your project uses, run the eligibility tool. Census species enter TREES planted per year in the planting schedule, with a nominal starting density and mortality rates so survival applies via the stems table.

Root-to-shoot ratio ?Belowground biomass as a share of aboveground. 0.24 is one IPCC value: VM0047 v1.1 asks for species or regional data first, then the IPCC value for your ecological zone (range 0.18 to 0.31). Also grosses up aboveground-only carbon curves.

Allometric equation

Method

Load from DB ?Select a reference equation from our allometric database to auto-populate coefficients.

Form type

Wood density ρ (g/cm³) ?Required for Form 5 (allometric) and volumetric equations. Typical range 0.3–0.9 g/cm³.

SEE

Equation reference

Mortality rates

Establishment (yrs 1–2) ?Annual mortality rate (%) during the establishment phase when trees are most vulnerable.

Juvenile (yrs 3–8) ?Annual mortality rate (%) during juvenile growth phase.

Growth (yrs 8–25) ?Annual mortality rate (%) during the main growth phase.

DBH & height by year

Common name

Coverage (%) ?Percentage of total project area planted with this species. All species must sum to 100%.

Starting stems / ha

Allometric / volumetric equation

Method

Load from DB ?Select a reference equation to auto-populate coefficients.

Form type

Wood density ρ (g/cm³) ?Required for Form 5 (allometric) and volumetric equations. Typical range 0.3–0.9 g/cm³.

SEE

Equation reference

Mortality rates

Establishment (yrs 1–2) ?Annual mortality rate (%) during the establishment phase when trees are most vulnerable.

Juvenile (yrs 3–8) ?Annual mortality rate (%) during juvenile growth phase.

Growth (yrs 8–25) ?Annual mortality rate (%) during the main growth phase.

DBH & height by year

Common name

Coverage (%) ?Percentage of total project area planted with this species. All species must sum to 100%.

Starting stems / ha

Allometric / volumetric equation

Method

Load from DB ?Select a reference equation to auto-populate coefficients.

Form type

Wood density ρ (g/cm³) ?Required for Form 5 (allometric) and volumetric equations. Typical range 0.3–0.9 g/cm³.

SEE

Equation reference

Mortality rates

Establishment (yrs 1–2) ?Annual mortality rate (%) during the establishment phase when trees are most vulnerable.

Juvenile (yrs 3–8) ?Annual mortality rate (%) during juvenile growth phase.

Growth (yrs 8–25) ?Annual mortality rate (%) during the main growth phase.

DBH & height by year

Common name

Coverage (%) ?Percentage of total project area planted with this species. All species must sum to 100%.

Starting stems / ha

Allometric / volumetric equation

Method

Load from DB ?Select a reference equation to auto-populate coefficients.

Form type

Wood density ρ (g/cm³) ?Required for Form 5 (allometric) and volumetric equations. Typical range 0.3–0.9 g/cm³.

SEE

Equation reference

Mortality rates

Establishment (yrs 1–2) ?Annual mortality rate (%) during the establishment phase when trees are most vulnerable.

Juvenile (yrs 3–8) ?Annual mortality rate (%) during juvenile growth phase.

Growth (yrs 8–25) ?Annual mortality rate (%) during the main growth phase.

DBH & height by year

Planting & harvest schedule

Hectares planted per year

Year	Sp. 1	Sp. 2	Sp. 3	Sp. 4

Thinning / harvest % by tree age

Age	Sp. 1	Sp. 2	Sp. 3	Sp. 4

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Live output

–

est. credits issued tCO₂e / year (average)

Total over project–

Gross AGB stock (final year)–

Gross BGB stock (final year)–

Gross carbon stock–

Performance benchmark–

Uncertainty deduction–

Leakage–

Project emissions (excl. harvest)–

Area chain credits–

Total credits issued–

Buffer factor

0.80

Buffer 20% · assumed

Model constants

C fraction0.47

C to CO₂e3.667

Root-to-shootper species (default 0.24)

Pesticide factor0.094 t/ha

Fertiliser N chain5.894 t / Mg N

Harvest activity threshold20% over 5 yrs

Results · ARR

Quantification results

Estimated carbon sequestration based on your inputs. Figures are indicative. Formal verification requires third-party assessment.

Average annual credits over project life

–

tCO₂e / year issued on average over – years

Total credits issued

–

tCO₂e over the project

Project length

–

years

Terminal carbon stock

–

tCO₂e gross (AGB + BGB, final year)

Summary breakdown

Gross AGB stock (final year)–

Gross BGB stock (final year)–

Performance benchmark deduction–

Uncertainty deduction–

Leakage deduction–

Cumulative project emissions (excl. harvest)–

Harvested carbon (memo - already reflected in standing stock, not deducted again)–

Buffer deduction (total)–

Area chain credits–

Census chain credits–

Total credits issued–

Carbon stock, deductions & net credits

Year	Gross stock (tCO₂e)	Emissions (cumul.)	Leakage	Net stock	CRₜ (change)	Carried deficit	Credited	Buffer	Issued
Run calculation to populate results

Dashboard

Methodology & project

Standard / methodology ?Sets the whole quantification structure: the emission reduction formula, whether a Downward Adjustment Factor applies, the Hawthorne index, upstream emission factors, leakage treatment and the fossil fuel switch rules. Suggested emission factors update with your choice. Gold Standard AWMS (v2.0) is assessed for eligibility but is not quantified here: its baseline is manure methane, a different calculation from fuel combustion.

Project length ?Years over which emission reductions are quantified, up to 21. Gold Standard methodologies use five-year crediting periods with baseline reassessment at renewal, which this early-stage estimate does not model.

Country of project ?Sets the suggested fNRB from CDM TOOL33 v3.0 and, for Gold Standard methodologies, the default DAF. If your country is not listed, choose a regional value or use the overrides below.

Number of stove types ?Up to four project device types can be modelled. Each displaces one baseline device type.

Adjustment factors

fNRB override ?Leave blank to use the national default for the country selected above. Enter a value to override, for example a sub-national MoFuSS figure.

DAF override ?Gold Standard methodologies only. Leave blank to use the country default for the 2026-2030 application period. Where no country value exists the 1.25% floor applies.

Hawthorne override ?Gold Standard SMEC and RECH only. The default 0.90 applies where usage comes from manual survey campaigns. Enter 1.0 if you will use continuous stove use monitors or qualify for the digital MRV exemption. MECD is exempt; VM0050 has no Hawthorne factor.

Usage rate scenario ?The share of each batch of devices still in regular use, by device age. Conservative declines from 100% to 80% by year five. Optimistic holds 100%, which is easiest to evidence with continuous stove use monitors.

Commissioning timing ?When during its commissioning year each annual batch enters service. Mid-year gives each batch half a year of operation in the year it is commissioned and full years thereafter - the realistic assumption where devices are distributed steadily through the year. Start of year credits a full first year.

Other project emissions ?A conservative uplift on project energy emissions, standing in for VM0050 Equation 9 items such as fuel transport and production. Under Gold Standard these are already covered by upstream factors and the embodied deduction, so Excluded is usually right.

Renewable biomass leakage ?VM0050 only. Leakage from a dedicated renewable biomass supply, per CDM TOOL16, in tCO2e over the project. Zero for projects without dedicated plantations or diverted residues. Other VM0050 leakage is already covered by the 0.95 factor.

Stove types

Distribution schedule

Enter the number of new devices commissioned in each year. Each year's entry becomes a batch that operates until the end of that stove type's technical life. Devices can be commissioned in years 1 to 10.

Emission reductions

–

tCO₂e over the project

Baseline emissions–

Project emissions–

Embodied device emissions–

Devices commissioned–

Annual average–

Per device-year–

Factors applied

fNRB–

DAF–

Hawthorne index–

Market leakage–

How the carbon credit calculator works

This calculator gives an early estimate of the carbon credits a biochar or clean cooking project could generate, by methodology. It is built for developers at feasibility or pre-feasibility stage who need a credible number before paying for a full study. It is free during the beta and you don't need an account. An account lets you save results to a project.

Biochar

The calculation follows the structure the standards use:

Biochar produced, from feedstock tonnage, moisture and conversion rate
Multiplied by the carbon content of the biochar, and by 44/12 to convert carbon to CO₂
Multiplied by a permanence factor, which depends on the standard and is usually based on the H/Corg ratio and soil temperature
Minus project emissions, leakage and counterfactual emissions

Example

One tonne of biochar at 75% carbon holds 0.75 × 44/12 = 2.75 tCO₂e before permanence and deductions.

Standards covered: Verra VM0044 v1.2 (high and low technology), Puro.earth Edition 2025 v2, Isometric, CSI Global Artisan C-Sink and Global Biochar C-Sink, Rainbow, and Climate Action Reserve (US and Canada only). The comparison tab shows the same project under every standard side by side, so you can see which one credits it most favourably.

If you don't have lab data yet, the tool suggests carbon content, moisture and conversion rate from your feedstock and pyrolysis process. Swap in lab results (carbon content and H/Corg) as soon as you have them, because they move the number more than anything else.

Clean cooking

Covers Verra VM0050 v1.0 and Gold Standard MECD v2.0, SMEC v4.0 and RECH v5.0. You enter up to four stove types and a distribution schedule over up to ten years. The tool then applies the country fNRB from CDM TOOL33 v3.0, the Gold Standard downward adjustment factor where it applies, usage rates and leakage. Results show emission reductions over the project, per year and per device-year.

ARR Private preview

ARR quantification under Verra VM0047 v1.1 is in private preview, covering both area-based and census-based planting. Ask us for access if you're developing an afforestation, reforestation or revegetation project.

What the estimate is, and what it isn't

The figures are indicative. They use published methodology equations and planning defaults, not a validated project design, and credits are only issued after third-party validation and verification. Treat the result as a guide to whether a project is worth taking further and which standard to aim for.

If the numbers look promising, the next step is usually a feasibility study.

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Estimate your project's carbon credit generation

Quantification results

ARR quantification

Quantification results

Estimated emission reductions

How the carbon credit calculator works

Biochar

Clean cooking

ARR Private preview

What the estimate is, and what it isn't

Previous results found

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