Carbon Calculators

Build a complete, auditable corporate GHG inventory across every scope and category — including the value-chain Scope 3 sources most tools skip.

Find the calculator for the regime that binds you — CSRD, IFRS S2, SEC or CBAM — check whether you're in scope, and get a defensible first estimate.

Set a science-based target, test the reduction pathway, and check a net-zero or carbon-neutral claim against the standard that governs it.

Attribute financed emissions correctly for loans, equity, mortgages and insurance, pick your PCAF asset class, and score the data quality of each figure.

Estimate what carbon costs you under a tax, an ETS or an internal shadow price — then find the cheapest tonnes to abate before you pay for them.

Price what carbon offsetting costs, tell offsets from durable removals, check a credit stands up, and keep your emissions accounting line clear.

Calculate scope 3 emissions for flights, fleets, freight and commuting on trusted factors, each mapped to the right GHG Protocol category from the start.

Calculate Scope 1 fuel and Scope 2 electricity emissions, get location- and market-based figures, and settle the RECs, PPAs and residual-mix questions.

Quantify the non-combustion Scope 1 emissions that skip the stack — refrigerant leaks, process reactions and vented gas — on defensible factors.

Measure the carbon of websites, AI prompts, streaming, email and cloud storage on a named method — with the grid and model assumptions made explicit.

Measure emissions and removals from agriculture, forestry and land use, and get a defensible land-sector figure built on IPCC factors, source by source.

Calculate waste emissions by disposal route and stream, account for the end-of-life of what you sell, and test whether reusable really beats single-use.

Estimate embodied carbon by material or across a whole building, benchmark against a baseline, and test a low-carbon substitution before you specify it.

Set the system boundary and allocation rules first, then calculate a credible ISO 14067 product carbon footprint — cradle-to-gate or cradle-to-grave.

Get a credible whole-entity carbon footprint for a business, restaurant, venue, farm or household from a handful of inputs — on the same named factors.

Convert any greenhouse gas to CO₂e with GWP factors, and turn tonnes of CO₂ into trees or everyday equivalents. Free building-block carbon converters.