Free carbon calculators
Every calculator shows which emission factor it used, where it comes from, and its license. No signups, no dark patterns.
For organizations
Organization footprint (Scope 1+2+3)
One screening view of your whole organization — energy, vehicles, travel, waste and water.
Electricity (any country)
Grid emissions with country-specific factors and open provenance.
Electricity (Singapore)
Grid emissions from the kWh on a Singapore bill, using the official EMA factor.
Fleet fuel
Diesel and petrol across vans, trucks and organization-run vehicles.
Refrigerant & air-con leaks
Scope 1 fugitive emissions from refrigerant top-ups, by gas type.
Business flights
Per-trip flight emissions by haul length.
Freight & shipping
Road, sea, air and rail freight per tonne-km.
Waste disposal
Scope 3 category 5 by waste stream and disposal route.
Water & wastewater
Mains supply and treatment, per cubic metre.
Purchased goods & services (spend)
Scope 3 screening from your spend ledger, by category.
Employee commuting
Scope 3 category 7 from a simple commute survey.
Office footprint
A fast whole-office estimate from energy, travel and waste.
School & campus
Classrooms, labs, transport, water and waste for any campus.
Clinic & healthcare
Consultation rooms, cooling, water and waste for care providers.
Manufacturing site
Process energy, fuels, refrigerants, freight and waste.
Restaurant & F&B
Kitchens, cold rooms, gas and deliveries.
Retail store
Storefront energy, logistics and packaging basics.
Warehouse & logistics
Sheds, forklifts, and the fleet that feeds them.
Construction project
Site fuel, plant and materials transport.
Events & conferences
Venues, travel and catering for a one-off event.
Hotel operations
Room-nights, laundry, kitchens and pools.
Office IT equipment
Laptops, monitors and servers — embodied and in use.