MPG (US) to gal/100mi (US) Converter

Convert MPG (US) (mpg) to gal/100mi (US) (gal/100mi) instantly. These units have an inverse relationship — use the converter above for accurate results.

MPG (US) to gal/100mi (US) 6 units

Common Fuel Economy Conversions

MPG (US) to gal/100mi (US) Conversion Table

MPG (US) (mpg) gal/100mi (US) (gal/100mi)
5 mpg 110.65192 gal/100mi
10 mpg 55.32596 gal/100mi
15 mpg 36.883973 gal/100mi
20 mpg 27.66298 gal/100mi
25 mpg 22.130384 gal/100mi
30 mpg 18.441987 gal/100mi
35 mpg 15.807417 gal/100mi
40 mpg 13.83149 gal/100mi
50 mpg 11.065192 gal/100mi
60 mpg 9.22099336 gal/100mi
80 mpg 6.91574502 gal/100mi
100 mpg 5.53259601 gal/100mi

📐 How to Convert MPG (US) to gal/100mi (US)

MPG (US) and gal/100mi (US) have an inverse (reciprocal) relationship — one measures how far you go per unit of fuel (efficiency), while the other measures how much fuel is needed per distance (consumption).

To convert, the value is first expressed as km/L, then the target unit's formula is applied. A higher mpg value corresponds to a lower gal/100mi value (better economy in both cases).

Example: 30 MPG (US) ≈ 18.441987 gal/100mi (US)

Convert gal/100mi (US) → MPG (US) instead →

Frequently Asked Questions

Q How do I convert MPG (US) to gal/100mi (US)?
These units have a reciprocal (inverse) relationship. To convert, first find the km/L equivalent, then apply the target unit's formula. Use the converter above for instant results.
Q What is 30 MPG (US) in gal/100mi (US)?
30 MPG (US) ≈ 18.441987 gal/100mi (US).

ℹ️ About These Units

MPG (US)
mpg

A fuel efficiency unit. Measures how far a vehicle travels per unit of fuel — higher is better.

gal/100mi (US)
gal/100mi

A fuel consumption unit. Measures how much fuel a vehicle uses per unit of distance — lower is better.