Fuel Consumption Converter
Convert between L/100km, MPG (US), MPG (imperial), and km/L.
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Fuel consumption: L/100km (AU/EU), MPG (US/UK), km/L (Japan/India). Higher MPG = better, but lower L/100km = better. Inverse relationship makes comparison unintuitive.
The Inverse Relationship
7 L/100km ≈ 33.6 MPG (US) or 40.4 MPG (imp). Small improvements at high consumption save more fuel.
US vs Imperial MPG
US gallon = 3.785 L; imperial = 4.546 L. 40 MPG (imp) ≈ 33.3 MPG (US). Always verify which gallon.
How to Use This Calculator
- Select 'Fuel'
Choose the category from the dropdown.
- Select your source unit
Pick the unit you're converting from.
- Enter the value
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- Select your target unit
Choose the unit you need.
Applications
Vehicle Comparison
5 L/100km ≈ 47 MPG (US). Understanding both helps read international reviews.
Fleet Cost Estimation
8 L/100km × 15,000 km/yr × $1.80/L ≈ $2,160/yr.
Trip Planning
1,500 km at 7 L/100km = 105 L of fuel needed.
Frequently Asked Questions
How do you convert L/100km to MPG?
US: 235.215 ÷ L/100km. 8 L/100km = 29.4 MPG (US). Imperial: 282.481 ÷ L/100km.
How do you convert MPG to L/100km?
US: 235.215 ÷ MPG. 30 MPG = 7.84 L/100km.
What is good fuel economy?
Under 7 L/100km is efficient (petrol). Hybrids: 4–5 L/100km. EVs: 15–20 kWh/100km.