Project developers and consultants use The Carbon Workbench to run biochar yields, model project feasibility and check footprints - all built on verified methodology, all in one place.
The tool suite
Built for project developers, consultants and carbon teams. Free tools to get started - Pro unlocks feasibility modelling, project economics and PDF exports.
Runs the full biomass → biochar → carbon → CO₂e chain. Tweak yield, moisture, permanence discount and process emissions and the numbers update instantly. Includes sanity-check ratios so you can spot if something's off before you share it.
Open Biochar Calculator →Scope 1, 2 and 3 for your organisation, built around BSI PAS 2060. Breaks down emissions by source and gives you a straight offset cost estimate at Gold Standard pricing. Useful for ESOS reports and CarbonZero assessments.
Open Footprint Analyser →Plug in household count, credit price and project life and you get annual credit volumes, total revenue and a simple ROI. Useful for sense-checking a project before you spend money on validation, or putting numbers together for a funder.
Open Feasibility Modeller →Enter system capacity, peak sun hours and the local grid emission factor and get annual MWh generation, tCO₂e credits and lifetime revenue. Presets for West Africa, East Africa, South Asia, SE Asia and Latin America - the regions where most Gold Standard solar projects are developed.
Open Solar Calculator →Estimate credits from afforestation, reforestation and revegetation projects under Verra VM0047 v1.1 - the new ICVCM-approved standard. Set hectares, forest type, permanence buffer and leakage deduction and see net annual credits with each deduction broken out line by line.
Open Forestry Calculator →The only tool of its kind. Choose project type and standard, enter your annual credit volume and price, and get an itemised breakdown of validation costs, annual verification fees, registry charges, net year-1 revenue and break-even timeline. Saves hours of VVB quote-gathering in early project planning.
Open Verification Costs →Try it now
Adjust the sliders and see what happens. Create an account when you want to save your numbers or access the Pro tools.
A data-driven personal footprint calculator covering 8 lifestyle categories - home energy, flights, car, food, shopping, digital, activity and more. Get a score, track your progress over time, and see exactly what would make the biggest difference.
No black boxes
Every emission factor has a source. Every formula is documented. Change any input and you see the effect immediately - which matters when someone asks you to justify a figure.
Learn and apply
The Learn section explains registries, verification, pricing, project design and embeds in plain English. It is there for developers, consultants and teams who want clearer context before they start modelling.
Start with a guide, understand the trade-offs, then move into the calculator, embed or intake flow that fits what you are trying to do.
Open the Learn hub →Pricing
The free tools are the real thing, not a watered-down demo. Upgrade to Pro when you need feasibility modelling, cookstove, solar, borehole or forestry screening, branded exports and embeddable tools.
How we compare
You can. But you'll spend a day building it, someone will question the emission factors, and you'll have to rebuild it every time something changes.
| Feature | Carbon Workbench | Spreadsheet | Enterprise GHG software |
|---|---|---|---|
| Gold Standard / Verra methodology | - | ||
| Biochar, solar & forestry calculators | - | - | |
| Project feasibility modelling | Manual | - | |
| Verification cost estimator | - | - | |
| Shareable project links | - | - | |
| Methodology selector | - | Limited | |
| Free tier | - | ||
| Embeddable calculators | - | - | |
| Starting price | £0 | £0 | £500+/mo |
FAQ
Answered honestly, with a few newer ones around embeds and team use.
All calculations use emission factors from IPCC AR6, UK DESNZ 2024, and Gold Standard approved databases. The biochar methodology is aligned with Puro.earth and Gold Standard permanence requirements. These are estimation tools - for formal credit issuance you'll still need independent verification.
The Carbon Workbench uses Gold Standard aligned methodology and is a strong starting point for project planning and feasibility. For formal submissions, you'll need a registered auditor to verify final numbers - but our tools will get you to the right ballpark quickly.
Four full tools - Biochar Calculator, Footprint Analyser, CO₂e Converter and Water Project Calculator - plus the Methodology Selector and Personal Carbon Score. All completely free, no time limit, no card required. Upgrade to Pro for feasibility modelling, cookstove, solar, borehole and forestry calculators, verification cost estimation, credit pricing, branded PDF exports, share links and embeddable tools.
Yes - cancel any time from your account. No long-term commitment. You keep Pro access until the end of your billing period.
Yes - Enterprise at £299/month adds lead-generating embeddable calculators, sales pipeline visibility, opportunity screening, branded proposals, team access and priority onboarding support. It is best introduced with a walkthrough so campaigns, proposal workflows, team access and embed requirements are aligned before rollout.
Use the free Methodology Selector tool - pick your project type, scale, region and priority (credit quality vs volume vs speed) and it returns ranked recommendations with a plain-English explanation of why each standard suits your project. It covers cookstoves, water, biochar, solar, forestry/ARR, REDD+, agricultural land management, methane capture and blue carbon.
Yes - Pro and Enterprise users can generate a shareable link from any calculator. The link opens a clean read-only project card showing your key results and inputs, without requiring the recipient to have an account. Useful for sharing feasibility estimates with funders or project partners before a meeting.
We update emission factors annually in line with UK DESNZ guidance and IPCC updates. Pro users are notified when factors change so you can rerun affected calculations.
Yes. Pro and Enterprise plans include embeddable calculators, impact counters, project maps and lead-generation widgets. You can preview them in the embed docs, then copy a live iframe into your website or client portal.
No card, no commitment. If it's useful, great. If you need more, Pro is £49/mo.
The Carbon Workbench - Explore the guides, then move into the right tool.