Calculating a car’s CO2 emissions from its mpg
February 22, 2010
Motorists who drive cars that were first registered before 2001 are unlikely to be aware of how much CO2 their vehicle emits.
A car’s V5 document (sometimes referred to as the logbook) details the amount of CO2 the vehicle emits per kilometre, but this is not the case for vehicles registered before 1st march 2001.
How to calculate CO2 g/km from mpg
If you know a car’s mpg figure, you can use a simple calculation to work out its CO2 g/km figure.
The calculation is simple, but you may find it helps to use a calculator.
The ethical choice
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Information correct at time of publication.