Fuel unit converter
Convert fuel volume and fuel economy between Indian, US, and UK units. Type a value and see every equivalent instantly.
Conversion reference
- 1 US gallon = 3.785 litres • 1 Imperial gallon = 4.546 litres
- km/L × 2.352 = mpg (US) • km/L × 2.825 = mpg (UK)
- L/100km = 100 ÷ km/L
FAQs about fuel units
How many litres are in a gallon?
One US gallon is 3.785 litres and one Imperial (UK) gallon is 4.546 litres. India measures fuel in litres, so this helps when reading US or UK figures.
How do I convert km/L to mpg?
Multiply km/L by 2.352 for US miles per gallon, or by 2.825 for UK miles per gallon. A car doing 18 km/L is about 42 mpg (US).
What is L/100km?
It is the litres used to travel 100 km — common on European cars. Lower is better. Convert from km/L by dividing 100 by your km/L figure.
Why do US and UK gallons differ?
They are simply two different historical units. The Imperial gallon used in the UK is about 20% larger than the US gallon, so always check which one a figure uses.
Which fuel economy unit is best?
In India, km/L is standard and easy to relate to the pump. L/100km and mpg are useful when comparing with cars or reviews from Europe or the US.
Is the conversion exact?
The volume and economy factors used here are the standard exact values, so the results are accurate for everyday use.