MPG (US) to L/100km Converter
Enter a value to instantly convert between fuel economy units.
1 MPG (US) = 235.2146 Liters per 100km
Key Formulas
MPG (US) → Liters per 100km
L/100km ≈ 235.215 / mpgLiters per 100km → MPG (US)
mpg ≈ 235.215 / L/100kmKm per Liter → MPG (US)
mpg = km/L × 2.35215MPG (US) → Km per Liter
km/L = mpg × 0.425144Formula
L/100km = (235.214583333) / mpg (numerator shown rounded)To convert US mpg to L/100 km, divide 235.215 by the mpg figure. The relationship is inverse, so doubling mpg halves the consumption. The constant is 100 times 3.785411784 L per US gallon, divided by 1.609344 km per mile. A car rated 30 mpg uses about 7.84 L/100 km, and 25 mpg uses about 9.41 L/100 km. The inverse scale shows why a gain from 15 to 20 mpg saves about 3.92 L per 100 km, while 30 to 35 mpg saves about 1.12 L.
Source: NIST named gallon and mile definitions; reciprocal fuel ratio derived from them
Reviewed by the Convert Calc editorial team · Last reviewed: · see our methodology
Frequently Asked Questions
Real-World Examples
Example: US sedan at 30 mpg, shown as L/100 km.
30 mpg = 7.84048611111111 L/100km
Example: US hybrid at 50 mpg, as L/100 km for a European comparison.
50 mpg = 4.704291666666666 L/100km
Example: US pickup at 20 mpg, in L/100 km.
20 mpg = 11.760729166666666 L/100km
Example: US compact at 40 mpg, restated as L/100 km.
40 mpg = 5.880364583333333 L/100km
Related Converters
See This in Context
Further Reading
-
MPG vs. L/100km: Convert and Compare Fuel Consumption
Derive reciprocal fuel conversions, identify US or Imperial gallons, and compare hypothetical fuel use over equal distances.
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MPGe Explained: Energy Equivalence, Charging Losses and Range
Understand MPGe's 33.7 kWh equivalence and why outlet-based efficiency cannot be multiplied by usable battery capacity to derive EV range.