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calcthai.com · Trip Fuel Cost Calculator
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Trip Fuel Cost Calculator
Estimate trip fuel use and cost from distance and fuel economy. Add tolls and parking, then split the total using your own fuel price.
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Estimate trip fuel use and cost from distance and fuel economy. Add tolls and parking, then split the total using your own fuel price.
How it works
Litres = total kilometres ÷ kilometres per litre. Fuel cost = litres × price per litre. Add tolls and parking, then divide by people. Convert L/100 km to km/L with 100 ÷ the stated L/100 km figure.
Example: 600 km at 15 km/L uses 40 L. At THB 35/L, fuel costs THB 1,400. With THB 300 tolls and THB 100 parking, the total is THB 1,800, or THB 450 for each of four people.
Include both outward and return distances yourself. Initial prices are examples, not live data. Traffic, load and driving affect actual use. Depreciation and maintenance are excluded.
Frequently asked questions
How do I enter 7 L/100 km?
Convert it to 100 ÷ 7 ≈ 14.2857 km/L and enter that fuel economy.
What about unequal shares or several payers?
Use the related trip-split tool for separate expenses and payers.
Sources
Method last verified 19 Sep 2026