Real Fuel Consumption Calculator for Cars and Motorcycles

Calculate real gasoline, diesel, or electric consumption from distance and fuel added. Compare cost per 100 km and check the result against the official figure.

Energy type
Currency 1 EUR = 1 EUR

Your measured trip

What did the trip actually use?

Your real consumption

6.5 L/100 kmGasoline
Trip cost€11.70€11.70 / 100 km

This trip is close to the official gasoline figure.

Compare running cost

Which option costs less per 100 km?

Longer bar means a higher running cost.

Gasoline

Add figures below
Cost / 100 km—
Consumption
—L/100 km

Diesel

Add figures below
Cost / 100 km—
Consumption
—L/100 km

Electric

Add figures below
Cost / 100 km—
Consumption
—kWh/100 km

Longer bar means a higher running cost.

Add official figure and comparison vehicles

Conversion ratios

Every row is linked to your real reading. Change a ratio to model a different vehicle, not a disconnected consumption.
Gasoline
Diesel
Electric
Distance per unit: 15.38 km/LUS fuel MPG: 36.2 mpgFormula: litres ÷ kilometres × 100Measurements stay in this browser.
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Frequently Asked Questions

How do I calculate real fuel consumption?

Enter the kilometres driven and the litres added at the next refill. Divide litres by kilometres and multiply by 100 to get L/100 km. For an electric vehicle, use kWh instead of litres to get kWh/100 km.

What should I enter for price?

Enter the price you actually paid per litre for gasoline or diesel, or per kWh for electricity. Select your currency first. The calculator then shows trip cost and cost per 100 km.

Can I compare gasoline, diesel, and electric cars?

Yes. The comparison shows the consumption and cost per 100 km for all three energy types. Enter the consumption and local price for the vehicles you want to compare.

Why is real consumption different from the official figure?

Official figures come from controlled tests. Traffic, speed, hills, payload, tire pressure, temperature, air conditioning, and driving style can make a real trip higher or lower.

# Calculate What Your Car Really Costs to Run

This calculator answers the practical question behind a fuel log: how much did my car really use and what did the trip cost? Enter distance, fuel or energy added, and the price you paid. You get real consumption, trip cost, and cost per 100 km.
3 readings Distance, amount, and price
L/100 km Gasoline and diesel
kWh/100 km Electric vehicles

# How to Measure Real Consumption

Fill the tank or charge the vehicle, reset the trip, and measure until the next refill or charge. Enter the distance and amount added. The formula is amount ÷ kilometres × 100. For example, 45 litres over 600 km is 7.5 L/100 km.
What you know Calculation Result
Litres and kilometresLitres ÷ kilometres × 100L/100 km
Kilowatt-hours and kilometreskWh ÷ kilometres × 100kWh/100 km
Amount and price per unitAmount × priceTrip cost
Consumption and priceConsumption × priceCost per 100 km

# Compare Gasoline, Diesel, and Electric Cost

Use the three comparison cards to see the running cost in one view. Enter each vehicle's consumption and the price you pay locally. Comparing cost per 100 km is more useful than comparing litres, kWh, or MPG alone because it puts different energy types on the same distance.

# Real Versus Official Consumption

Use the same vehicle reference
Add the official figure shown for your car or motorcycle in the optional section. Real driving can use more or less energy because of traffic, speed, hills, payload, tire pressure, temperature, air conditioning, and driving style.

Bibliographic References

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