Fuel Cost Calculator
Gallons or liters for a trip, then cost at the price you type. This is not a live station feed and not a fuel unit converter.
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How to estimate trip fuel cost
- Enter the trip distance and choose miles or kilometers.
- Enter fuel economy as US miles per gallon or as liters per 100 km.
- Type the price per US gallon or per liter. The page does not load a live pump price.
- Read fuel needed and trip cost. Nothing is sent to CZNull.
Fuel cost
Trip spend from distance, economy, and a typed price
| Fuel needed (US gal) | miles / mpg |
|---|---|
| L/100 km to mpg | mpg = 235.214583 / (L/100 km) |
| US gallon | 3.785411784 liters |
| Cost per gallon | gallons × price |
| Cost per liter | liters × price |
| Price source | The number you type. Not a live fuel-price feed. |
How trip fuel cost is computed
Distance converts to miles. Economy converts to US mpg. Fuel in gallons is miles divided by mpg. Liters use 3.785411784 liters per US gallon. If you entered L/100 km, mpg is 235.214583 divided by that figure. Cost multiplies volume by the price unit you picked.
Fuel economy, US gallon, and trip cost
US mpg, L/100 km, the US gallon, and a typed unit price are the entities on this page. UK mpg is not the input. Open the mpg calculator when you know distance and fuel used and want economy, not spend.
Typed price, not a pump feed
Enter the price you saw or plan to pay. CZNull does not fetch station prices or taxes. This page is not the fuel unit converter. Pair a drive time with speed, distance, and time.
Use cases
Road-trip budgets, comparing a highway mpg figure to a city L/100 km sticker, and converting a liter price to a gallon trip. Idle, hills, and cargo are not modeled.
Limits
Distance and economy must be greater than 0. Price can be 0. Invalid input shows in the status line. Figures stay in this tab.