Trip Fuel Cost Calculator

Gallons needed, total fuel cost, and cost per mile from trip distance, mpg, and pump price

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Fuel, Pressure & Fill-Up Gear

The calculator turns miles, mpg, and pump price into gallons and dollars. A gas can covers a reserve, a pressure gauge and inflator keep rolling resistance honest, and an OBD reader helps you grab the trip-computer mpg you actually plug in.

Scepter 5-Gallon Gas Can FSCG552

Reserve fuel for a long trip or a remote fill. The calculator tells you gallons needed; the can is how you carry a measured extra without guessing at the pump.

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AstroAI Digital Tire Pressure Gauge (0–150 PSI)

Underinflated tires raise rolling resistance and burn more fuel than the mpg you typed. Check cold PSI against the door sticker before you trust a commute-cost number.

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AstroAI 12V Portable Tire Inflator

Set door-sticker pressure after a temperature swing. Soft tires are a common reason actual dollars run higher than gallons × pump price from window-sticker mpg.

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ANCEL AD310 Classic OBD2 Scanner

Live data and stored codes on most 1996+ OBD2 vehicles. Pair it with fill-up math when the dash trip computer and the window sticker disagree.

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Run the Trip Fuel Numbers

Miles, mpg, and $/gallon. Gallons needed, total cost, cost per mile. Round-trip and multi-trip commute modes.

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Wrong Tire Size Changes Rolling Load

Diameter % and speedometer error from two size codes. Size and pressure both move real-world mpg.

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How to Use This Trip Fuel Cost Calculator

Enter the one-way distance, the mpg you actually get (or the EPA number that matches the trip), and the pump price. Choose round-trip if you are coming back the same way. Set number of trips above 1 to roll a commute into a weekly or monthly total.

Gallons = miles ÷ mpg
Total cost = gallons × $/gallon
Cost per mile = $/gallon ÷ mpg

Find a real mpg instead of the window sticker: guide. Receipt higher than this screen: troubleshooting. City vs highway rating: comparison.

Trip Fuel Cost Calculator