Estimate trip fuel cost from distance, economy, and price per unit. Fully client-side — no account, uploads, or remote storage.
Added Apr 18, 2026
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Result
Enter a value for unit system to see your result.
Calculates the fuel cost for a trip given distance, vehicle fuel efficiency, and fuel price. Supports both metric (L/100km) and imperial (miles per gallon) units.
Fuel used (L) = Distance (km) × Efficiency (L/100km) ÷ 100
200 km × 8 L/100km ÷ 100 = 16 litres; 16 × $1.80 = $28.80.
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Result
120 miles ÷ 30 mpg = 4 gallons; 4 × $3.50 = $14.00.
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Result
Divide 235.21 by the L/100km value. For example: 8 L/100km = 235.21 ÷ 8 ≈ 29.4 mpg.
A car that uses 6 L/100km instead of 8 L/100km saves 25% on fuel for every trip — equivalent to getting a 25% discount on fuel prices.