Explain how to calculate fuel efficiency.

Fuel efficiency is calculated by dividing the distance travelled by the amount of fuel used.

To calculate fuel efficiency, you first need to know two key pieces of information: the distance your vehicle has travelled and the amount of fuel it has consumed. The distance is usually measured in miles or kilometres, and the fuel is typically measured in litres or gallons.

For example, if you drove 300 miles and used 10 gallons of fuel, you would calculate the fuel efficiency by dividing the distance by the fuel used. So, 300 miles ÷ 10 gallons = 30 miles per gallon (mpg). This means your vehicle can travel 30 miles for every gallon of fuel it uses.

In metric units, if you drove 500 kilometres and used 50 litres of fuel, you would calculate the fuel efficiency by dividing the distance by the fuel used. So, 500 kilometres ÷ 50 litres = 10 kilometres per litre (km/l). This means your vehicle can travel 10 kilometres for every litre of fuel it uses.

Sometimes, fuel efficiency is expressed in terms of fuel consumption, which is the inverse of fuel efficiency. For example, in the UK, fuel consumption is often measured in litres per 100 kilometres (L/100 km). To convert from km/l to L/100 km, you can use the formula: 100 ÷ (km/l). So, if your vehicle has a fuel efficiency of 10 km/l, the fuel consumption would be 100 ÷ 10 = 10 L/100 km.

Understanding how to calculate fuel efficiency helps you to better manage your fuel costs and reduce your environmental impact.