Project developers and consultants use The Carbon Workbench to run biochar yields, model project feasibility and check footprints - all built around transparent methodology references, all in one place.
No card needed·Not sure where to start? Use Project Intake.
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 live calculators below. Create an account when you want to save your numbers or access the full Pro suite.
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 →Outputs people can trust
Each calculator is designed to show the assumptions, emission factors and deductions behind the result so a developer can review the logic before using it in a proposal or feasibility note.
Try a calculator →Pro workflows turn calculator results into cleaner client-facing outputs: branded exports, saved assumptions and shareable links that are easier to send to a funder, colleague or client.
See Pro features →Pro keeps commercial work close to the tools: embedded lead capture, opportunity screening, portfolio records, stock views and cleaner proposal links for carbon teams.
Explore embeddable tools →Pricing
Use the free tools to test the workflow. Upgrade to Pro when you want the full calculator library, saved assumptions, branded exports, share links and embeddable tools for your own site or client work.
Project, business, finance and commercial tools in one account.
Turn results into something you can send after a call.
Configure calculators and widgets without building them yourself.
Keep exports and embeds closer to your own client workflow.
How we compare
For a one-off note, a spreadsheet is fine. The problem starts when you need repeatable assumptions, clean exports, share links, embeddable tools or client-facing outputs that do not break the moment someone edits the wrong cell.
| Feature | Carbon Workbench | Spreadsheet | Traditional GHG software |
|---|---|---|---|
| Carbon project calculator library | Build yourself | Usually corporate footprint focused | |
| Saved assumptions and repeatable outputs | Easy to overwrite | ||
| Branded PDF exports and CSV-ready outputs | Manual formatting | Often limited or expensive | |
| Shareable calculation links | Send a file | Account access often needed | |
| Embeddable calculators and widgets | - | Rare | |
| Methodology and market context | Separate notes | Variable | |
| Stock baskets and proposal links | Manual | - | |
| Setup time | Minutes | Hours or days | Weeks |
| Starting price | £0 | £0 + upkeep | Often £500+/mo |
FAQ
Answered honestly.
Calculations reference published sources such as IPCC AR6, UK DESNZ 2024 and methodology guidance from recognised carbon standards where relevant. The biochar workflow also reflects 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.
The free tier includes core calculators and guidance tools so you can test the workflow without a card. Upgrade to Pro for the full calculator suite, saved calculations, branded PDF and CSV-ready outputs, share links, embeddable tools, branding controls and the Stock Desk workflow.
Yes - cancel any time from your account. No long-term commitment. You keep Pro access until the end of your billing period.
Yes - start with Pro for the full tool suite, branded exports, share links and embeddable calculators. Optional setup support is there if you want help configuring embeds, stock workflows, proposal links, SharePoint, client websites or team onboarding.
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 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.
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.