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

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

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

Common Fuel Economy Conversions

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

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

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

gal/100mi (US) and MPG (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 gal/100mi value corresponds to a lower mpg value (better economy in both cases).

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

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

Frequently Asked Questions

Q How do I convert gal/100mi (US) to MPG (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 gal/100mi (US) in MPG (US)?
30 gal/100mi (US) ≈ 18.441987 MPG (US).

ℹ️ About These Units

gal/100mi (US)
gal/100mi

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

MPG (US)
mpg

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