Work out the offsets needed to neutralise a given quantity of emissions.
Offset quality varies widely, so buying a buffer above the nominal requirement is prudent. A mature tree absorbs only about 21 kg of CO2 a year, which is why tree-equivalent figures are so large. Offsets should follow emissions reduction rather than replace it, since permanence and additionality are difficult to verify.
Carbon Offset
Offsets = emissions ÷ (1 − under-delivery allowance); cost = offsets × price per tonne
Offsets = emissions ÷ (1 − under-delivery allowance); cost = offsets × price per tonne Offset quality varies widely, so buying a buffer above the nominal requirement is prudent. A mature tree absorbs only about 21 kg of CO2 a year, which is why tree-equivalent figures are so large.
Offsets should follow emissions reduction rather than replace it, since permanence and additionality are difficult to verify.
This calculator takes 4 inputs: Annual emissions to offset, Offset price per tonne, Allowance for offset under-delivery, Years to offset. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.