Estimate the quantity and budget of carbon offsets needed after accounting for measured emissions, internal reductions, and offsets already held. The calculator keeps gross emissions and reductions visible so purchased credits do not obscure operational progress. Enter a price per metric ton to produce a planning cost; actual procurement quality and eligibility require separate due diligence.
The main result is the additional offset quantity required to match the remaining emissions under the entered assumptions. It does not establish whether a credit is eligible or whether a neutrality claim is appropriate.
Carbon-credit quality, additionality, permanence, leakage, retirement, vintage, registry status, and claim rules are outside this arithmetic estimate.
For 10,000 tCO₂e gross emissions, 2,500 tCO₂e of internal reductions, 1,000 tCO₂e of offsets held, and a $20 price, residual emissions are 7,500 tCO₂e, the additional requirement is 6,500 tCO₂e, and the budget is $130,000.
No. Internal reductions lower the organization's own footprint, while offsets are external credits applied to residual emissions.
Residual emissions are floored at zero, so the calculator will not produce a negative offset requirement.
No. A claim also depends on inventory quality, reduction strategy, credit eligibility, retirement, and the applicable standard.
You may include them in the per-ton price or budget for them separately, but use a consistent procurement assumption.
It is the share of residual emissions covered by offsets already held, capped at 100%.
| Variable | Meaning |
|---|---|
| Gross emissions | Inventory total before entered internal reductions |
| Residual emissions | Gross emissions less internal reductions, floored at zero |
| Offsets held | Eligible credits already available |
| Additional requirement | Residual emissions less held offsets, floored at zero |