Gas Efficiency Calculator

Formatting only. This does not change the calculation.
Odometer difference between two fill-ups. Used in "distance and fuel used" mode, and as the trip length when converting.
Volume needed to refill the tank after that distance.
Price per unit of the fuel volume unit above (per US gallon, per imperial gallon or per litre).
Converted economy
28.0000
Fuel Economy Converter and MPG Calculator
Converted unit
Miles per US gallon (mpg, US)
Miles per US gallon
28.0000 mpg
Miles per imperial gallon
33.6266 mpg
Kilometres per litre
11.9040 km/L
Litres per 100 km
8.4005 L/100km
Miles per litre
7.3968 mi/L
Kilometres per US gallon
45.0616 km/gal
US gallons per mile
0.035714 gal/mi
US gallons per 100 miles
3.5714 gal/100 mi
Fuel needed for the distance
12.5000
Fuel volume unit
US gallons
Fuel cost for the distance
45.00
Fuel cost per distance unit
0.1286
Worked out from NIST Handbook 44, Appendix C - General Tables of Units of Measurement and 3 other sources.

How this is worked out

5 steps
  1. Distance 350 mi = 563.2704 km; fuel 12.5 gal-us = 47.3176 L.
  2. Economy = 563.2704 km / 47.3176 L = 11.90402 km/L.
  3. 11.904024 km/L = 28 mpg-us.
  4. Fuel for 350 mi = 563.2704 km / 11.904024 km/L = 47.3176 L = 12.5 gal-us.
  5. Cost = 12.5 gal-us x 3.6 = 45, i.e. 0.1286 per mi.

Results are general information, not financial, tax, legal, medical or engineering advice.