Free carbon tools, checks and templates

50 free calculators, checks, templates and reference pages, sorted by what you need to do. 49 of them need no account.

Measure my emissions

• Upload a bill: A photo or PDF of an electricity bill or fuel invoice in, kg CO2 out, with the factor behind it. (Check. Free.)
• Your carbon number for a buyer: For when a buyer or bank asks: type your bill units, get the number and a reply to send. (Check. Free.)
• Electricity bill to CO2: Type the units on your bill. One month or a full year. (Calculator. Free.)
• Fuel to CO2: Diesel, petrol, LPG, CNG, PNG, furnace oil or coal, with the arithmetic shown. (Calculator. Free.)
• Monthly emissions register: A spreadsheet with the fuel and grid factors already filled in. (Download .xlsx. Free.)
• Scope 1, 2 and 3 hotspots: Estimate Scope 1 and 2 and see where your Scope 3 sits. (Check. Free.)
• Product carbon footprint: Cradle-to-gate emissions per unit of product, following ISO 14067. (Calculator. Free.)
• Freight emissions: Road, rail, sea and air legs, worked out the GLEC way. (Calculator. Free.)
• Cloud and data centre emissions: Server and cloud emissions by region, location and market based. (Calculator. Free.)
• Your 1.5°C pathway: The yearly cut your Scope 1 and 2 need from your bills, at the SBTi pace. (Check. Free.)
• Net-zero planner: Turn your recorded emissions into a plan with tasks you can track. (Planner. Free, sign-in.)

Export to the EU (CBAM)

• CBAM cost calculator: What your EU buyer pays for your steel, aluminium, cement or fertiliser, year by year to 2034. (Calculator. Free.)
• CBAM cost per tonne by sector: Cost per tonne from 2026 to 2034 for steel, aluminium, cement, fertilisers and hydrogen. (Reference. Free.)
• CBAM supplier data pack: The pack your EU buyer asks for, per CN code, ready to send. (Download .xlsx, PDF. Free.)
• CBAM report for your plant: Model your plant and download the operator report, verifier pack and buyer summary. (Download .xlsx, PDF. Free.)
• CBAM supplier data template: Every field an EU importer asks you for, one pack per installation and year. (Download .xlsx. Free.)
• Declarant data checklist: Who files for your shipment, and the list of what they need from you. (Download PDF. Free.)
• Carbon pricing impact: EU ETS and CBAM cost exposure to 2034, in best, base and worst price cases. (Calculator. Free.)
• What your product needs: A checklist for ESPR, the Digital Product Passport, REACH and the Battery Regulation. (Check. Free.)
• CBAM for Indian exporters: How to get your EU buyer charged on your real number, not the EU default value. (Guide. Free.)
• CBAM-Rechner: The CBAM cost calculator in German, for EU importers. (Calculator. Free.)

Report (BRSR, ESG, Scope 3)

• Which rules apply to me: Three questions show which of BRSR, CSRD, ISSB, GRI and CBAM apply to you. (Check. Free.)
• BRSR reply sheet: What a listed customer asks under BRSR Core, and a sheet to reply with. (Download PDF, CSV. Free.)
• BRSR supplier questionnaire: The value chain questions in the order customers ask them, with a unit beside every number. (Download .xlsx. Free.)
• Sample ESG report: A full 64-page report to copy the structure from, sent to your email. (PDF by email. Free, with email.)
• Scope 3 supplier evidence check: How much of your supplier base is backed by bills, and a request to send today. (Check. Free.)
• Scope 3 supplier request letter: A letter that asks suppliers for the bills they already keep. (Download .txt. Free.)
• Supplier emissions and risk: Score each supplier on emissions and risk for Scope 3 Category 1. (Calculator. Free.)
• Supply chain rules check: Which of LkSG, CSDDD, UFLPA and EUDR your suppliers bring into play. (Check. Free.)
• EcoVadis readiness: Where you stand on all four EcoVadis themes before the questionnaire arrives. (Check. Free.)
• Audit readiness score: How ready your ESG figures are for an assurance provider. (Check. Free.)
• Safety rates for BRSR: Work out LTIFR and TRIR from your hours and incidents. (Calculator. Free.)
• Does EPR apply to me: Plastic packaging, e-waste, batteries, tyres or used oil: see if the rules cover you. (Check. Free.)
• Carbon price stress test: What a carbon price would add to your costs, for TCFD and IFRS S2. (Check. Free.)

Get paid (green loans, carbon credits, carbon removal)

• Green loan check: Seven quick answers and your email show what a lender will ask you for. (Check. Free, with email.)
• Green loan schemes compared: SIDBI, ADEETIE and bank loans sorted by what the money is for, with a loan file to take to your bank. (Download PDF. Free.)
• What your loan KPI is worth: If you meet a sustainability-linked loan KPI every year, what the margin step-down is worth. Your lender sets the terms. (Check. Free.)
• Solar savings: Payback, IRR and CO2 avoided for rooftop solar or a PPA. (Calculator. Free.)
• Carbon credits in India: Three taps to the carbon market that applies to you, and what it takes. (Check. Free.)
• Carbon removal pathways: Biochar, rock weathering, direct air capture, agroforestry and rice methane compared: which remove carbon, and for how long. (Guide. Free.)
• One season on your farm: Pick your crop and follow residue to biochar to the proof a buyer pays for. (Guide. Free.)
• Check a removal credit: Trace a tonne to its field, kiln and lab test before you buy. (Guide. Free.)

Learn and look up

• Emission factor library: India factors for diesel, LPG, coal, grid power and more, with where each comes from. (Reference. Free.)
• India climate data: Grid factor since FY 2013-14, CCTS targets, CBAM default values and fuel conversions. (Download CSV. Free.)
• Answers: Straight answers on CBAM, BRSR, Scope 3, green loans and Senseible. (Guide. Free.)
• Guides: Longer reads on CBAM, Scope 3, BRSR and green finance. (Guide. Free.)
• Choose carbon accounting software: Weigh what matters, score your shortlist and take the questions to every demo. (Download .txt. Free.)
• Carbon accounting software compared: Tools scored on the same criteria, Senseible included. (Guide. Free.)
• White paper: How a bill becomes an emission figure: equations, factors, limits of AI and the audit trail. (Guide. Free.)
• Help Center: Uploads, monthly reads, payments and fixes for messages you may see. (Guide. Free.)

Before you start

Are these really free?

Yes. Nothing on this page costs anything. Most of it needs no account. The few that do are marked "Free, sign-in". The green loan check and the sample ESG report ask for your email.

Do you keep the bill I upload without an account?

No. Without an account nothing is stored on our side. The result stays in your browser for 24 hours. Sign in if you want to keep it as a record.

Is a free check the same as an accredited verification?

No. The free tools give you an estimate or a record built from your own bills. Accredited verification is done by an independent verifier, and carbon credits are issued by a registry.

Where should I start?

If a buyer or bank asked for your carbon footprint, upload one electricity bill. If you export steel, aluminium, cement or fertiliser to the EU, start with the CBAM cost calculator.

Start with one electricity bill: upload it and see the CO2 and the factor behind it. No account needed.