Fuel Economy Converter
Convert between MPG, L/100km, km/L, and more
Calculator
Note: Fuel economy has two measurement systems:
- Distance per volume (mpg, km/L) - higher is better
- Volume per distance (L/100km) - lower is better
30 mpg US = 7.8404807 L/100km
Quick Conversions
Common Conversions
Fuel Efficiency Guide
How to Use
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Fuel Economy
L/100km = 235.215 ÷ MPG | MPG = 235.215 ÷ L/100km
MPG and L/100km are inversely related. Higher MPG = Lower L/100km = Better efficiency.
Frequently Asked Questions
L/100km = 235.215 ÷ MPG. Example: 30 MPG = 7.84 L/100km. Inverse relationship - higher MPG = lower L/100km.
US gal = 3.785 L, UK gal = 4.546 L. UK MPG is ~20% higher. 30 US MPG = 36 UK MPG.
Cars: 30-40 MPG (7-8 L/100km) good, 50+ excellent. SUVs: 25-30 good. Hybrids: 50-60 MPG. EVs: kWh/100km.
Cost/mile = Fuel price ÷ MPG. $3.50/gal ÷ 30 MPG = $0.117/mile. For L/100km: (L/100km × price) ÷ 100.
Converters
Unit converters for length, weight, temperature, and more