Estimate how many carbon offsets a supply chain would need after planned reductions, based on purchased-goods, freight, and supplier emissions. The calculator separates the residual footprint from the portion you choose to cover and adds an optional buffer for inventory or verification uncertainty.
Offsets required = (Purchased goods + Freight + Other supplier emissions) × (1 − Reduction %) × Coverage % × (1 + Buffer %)
The main result is the number of one-metric-tonne CO₂e credits required under the assumptions entered. It is a planning quantity, not proof that a particular credit is eligible or has been retired.
Offset quality, eligibility, vintage, additionality, and retirement rules are not evaluated. Verify program requirements before purchasing credits.
With 6,500 + 1,800 + 2,700 = 11,000 t CO₂e, a 15% reduction leaves 9,350 t. Covering 100% with a 5% buffer requires 9,817.5 offsets.
Include them only if they fall inside the supply-chain boundary you are planning to offset; avoid counting emissions already included elsewhere.
The optional buffer provides extra credits for estimation uncertainty or program rules. Set it to zero when no buffer is needed.
A standard carbon credit generally represents one metric tonne of CO2e, but eligibility and issuance rules vary by program.
Yes. Enter the chosen coverage percentage to model a partial offset commitment.
No. A neutrality claim depends on boundaries, reductions, credit quality, retirement, and the rules of the claim framework.
| Variable | Meaning | Unit |
|---|---|---|
| Gross footprint | Sum of included supply-chain sources | t CO₂e |
| Reduction | Planned direct reduction before offsets | % |
| Coverage | Share of residual emissions selected for offsetting | % |
| Buffer | Additional credits above covered residuals | % |