Try the core calculators
No card, no time limit. Useful for first-pass estimates and seeing whether the workflow fits.
Run practical carbon calculations for free. Unlock a professional report only when the work needs a branded, client-ready output. Embeds and commercial workspace setup remain separate services.
No card needed·Not sure where to start? Use Project Intake.
Tools and outputs
Run the project calculators before paying. Unlock a report only when a result needs to become a client-ready project record.
No card, no time limit. Useful for first-pass estimates and seeing whether the workflow fits.
Branded PDF, project inputs, assumptions and permanent re-export access for the project you unlock.
View report options →Use the tools yourself, or ask for help configuring reports, embeds, SharePoint pages or client website installs.
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 calculator →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 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 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 calculator →Use the calculators freely, keep useful work in your account and unlock a client-ready report only when the project needs a professional output.
Present the result, project context and key outputs in a concise client-ready opening section.
Record material inputs, assumptions, deductions and methodology notes behind the calculation.
Apply saved organisation branding and export a polished report without rebuilding the work in a document.
Revise the same unlocked project and export it again without spending another report credit.
Try it now
Adjust the live calculators below. Create a free account to keep your work, then unlock a professional report only when you need a client-ready output.
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 →Report unlocks turn calculator results into cleaner client-facing outputs with project inputs, saved assumptions and organisation branding.
See report options →Optional workspace services can keep embedded lead capture, stock records, basket views and proposal links close to the tools for teams that need them.
Explore embeddable tools →Pricing
Use the project calculators and see the result first. Choose a report only when you need a branded, reusable professional output.
Use the project tools to test the opportunity and assumptions.
Turn one finished project into a structured professional output.
Re-export an unlocked project without spending another credit.
Pay for the volume of professional outputs you actually need.
Biochar, feasibility, cookstove, solar, borehole, forestry, verification, footprint and methodology tools.
Create an account when you want to save and return to calculation inputs.
Unlock branded PDFs per project with permanent re-export access.
Contact us for tailored implementation or an existing workspace requirement.
How we compare
A spreadsheet is fine for a private scratch model. TCW is for the point where the same calculation needs to be reused, shared, exported, embedded or tied to stock, basket and client-facing workflows without rebuilding the model each time.
| 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 | ||
| Calculate-first and report-unlock journey | Manual handoff | Usually gated from the start | |
| 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 | - | |
| Client website and SharePoint use | Not practical | Custom project | |
| 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.
You can use the project calculators and see results without paying. Create a free account to keep useful work. Buy a report only when a project needs a branded professional output.
One- and three-report purchases add credits to your account. Using a credit permanently unlocks that project for re-export. Unlimited Reports provides report access for 12 months.
Yes. Contact us if you need help configuring team workflows, embeds, SharePoint or client websites. These are separate setup requirements rather than part of a report purchase.
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.
Unlocked projects can be exported again after edits without using another report credit. Contact us if you need a tailored public sharing workflow.
We review emission factors against UK DESNZ guidance, IPCC updates and relevant carbon-standard methodology changes.
No card to calculate. Pay only when a project needs a professional report.
The Carbon Workbench - Explore the guides, then move into the right tool.