Fuel Average Calculator

Formatting only. This does not change the calculation.
Choose "distance and fuel used" to work economy out from a tank fill.
Used when converting an existing figure.
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
7.8405
Fuel Economy Converter and MPG Calculator
Converted unit
Litres per 100 kilometres (L/100km)
Miles per US gallon
30.0000 mpg
Miles per imperial gallon
36.0285 mpg
Kilometres per litre
12.7543 km/L
Litres per 100 km
7.8405 L/100km
Miles per litre
7.9252 mi/L
Kilometres per US gallon
48.2803 km/gal
US gallons per mile
0.033333 gal/mi
US gallons per 100 miles
3.3333 gal/100 mi
Fuel volume unit
US gallons
Worked out from NIST Handbook 44, Appendix C - General Tables of Units of Measurement and 3 other sources.

How this is worked out

2 steps
  1. 30 Miles per US gallon (mpg, US) = 12.754311 km/L.
  2. 12.754311 km/L = 7.840486 L/100km.

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