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Motorcycle Fuel Consumption Calculator

Calculates L/100 km, km/L, mpg, cost per km, tank range and trip cost from distance and fuel used.

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The most reliable way to measure real fuel consumption is the 'tank-to-tank' method: fill the tank completely, reset the trip meter, and at the next full fill-up divide the fuel added by the distance driven.

The calculator gives consumption in L/100 km and km/L, plus the US and UK mpg equivalents. Enter the fuel price to get the cost per km and the cost of a planned trip.

km

Between two full fill-ups

L
TRY/L

Optional

km

Optional

L

Optional

Consumption per 100 km

3 L

Per litre

33.3 km

mpg (US / UK)

78.4 / 94.2

Miles per gallon equivalent

How it is calculated

L/100 km = fuel (L) ÷ distance (km) × 100; km/L = distance ÷ fuel. They are inverses: dividing 100 by one gives the other.

Cost per km = fuel × price per litre ÷ distance. Fuel for a trip = trip distance × L/100 km ÷ 100.

Tank range = tank capacity ÷ L/100 km × 100. Remember to keep a reserve for refuelling.

Formula

  • L/100 km = litres ÷ km × 100
  • km/L = km ÷ litres
  • Cost per km = litres × price ÷ km
  • Trip cost = trip km × L/100 km ÷ 100 × price
  • mpg (US) = 235.21 ÷ L/100 km · mpg (UK) = 282.48 ÷ L/100 km

Worked example

  1. 19.6 litres over 320 km: 9.6 ÷ 320 × 100 = 3.0 L/100 km; 320 ÷ 9.6 = 33.3 km/L (78.4 mpg US, 94.2 mpg UK)
  2. 2At an example price of 45 TRY per litre: 9.6 × 45 ÷ 320 = 1.35 TRY/km; 100 km = 135 TRY
  3. 3A 500 km trip: 500 × 3.0 ÷ 100 = 15 litres → 15 × 45 = 675 TRY
  4. 4Range on a 12-litre tank: 12 ÷ 3.0 × 100 = 400 km

Good to know

  • Low tyre pressure increases rolling resistance and fuel use; check the pressure regularly with cold tyres.
  • A dirty air filter, a worn spark plug and a badly adjusted carburettor or injection system all increase consumption.
  • Short city trips and stop-and-go traffic make the same motorcycle use noticeably more fuel than on the open road.

Frequently asked questions

How much fuel does my motorcycle use per 100 km?

It depends on the model and how you ride; measure tank-to-tank for an accurate figure. As a rough guide, 125 cc scooters and motorcycles use about 2–3 L/100 km and 250–700 cc motorcycles about 3.5–5.5 L/100 km; riding style and load change this considerably.

How do I convert L/100 km to km/L?

Divide 100 by the L/100 km figure: 3 L/100 km = 100 ÷ 3 = 33.3 km/L. For the reverse, divide 100 by the km/L figure.

Why fill the tank completely?

Only the fuel used between two full fill-ups is known exactly. Measurements with partial fills are misleading because the fuel level in the tank is uncertain.

I changed tyre size – is the measurement still correct?

If the speedometer is off, the distance is off too. Find the error with our tyre size calculator and correct the distance, or measure the distance with a navigation app.

Results are for information only and are based on theoretical calculations. For parts and maintenance, follow your motorcycle's owner's manual and the manufacturer's specifications. Last reviewed: October 8, 2026

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