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Carbon Savings Calculator

CO₂ avoided by renewable generation or efficiency, expressed in trees and car miles.

Enter values

UK ~233, US ~370, EU average ~250

Results update as you type.

Result

CO₂ avoided per year

1,048.5 kg

Over the period
26.213 tonnes
Equivalent trees planted
1,248
a mature tree absorbs ~21 kg CO₂ a year
Car miles avoided
3,869 miles/year
Flights avoided (London–New York)
26.58
Per day
2.873 kg

About the Carbon Savings Calculator

CO₂ avoided by renewable generation or efficiency, expressed in trees and car miles.

Also known as: co2 saved calculator, carbon offset calculator, emissions avoided, green energy co2.

How to use this calculator

  1. Enter energy from renewables or saved, grid carbon intensity, over how many years.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

kg CO₂ = kWh × grid carbon intensity ÷ 1000

Worked example

Using the values pre-filled in the calculator above:

  • Energy from renewables or saved = 4,500 kWh/year
  • Grid carbon intensity = 233 g CO₂/kWh
  • Over how many years = 25

the calculator returns:

  • CO₂ avoided per year: 1,048.5 kg
  • Over the period: 26.213 tonnes
  • Equivalent trees planted: 1,248
  • Car miles avoided: 3,869 miles/year