How to make a monthly budget you can actually stick to
A practical guide to making a monthly budget in the U.S., with dollar examples, biweekly paychecks and simple methods like 50/30/20 and zero-based budgeting.
Fuel cost calculator (gas trip cost)
Calculate how much gas a trip will cost, round trip and per person. Works in miles and gallons (MPG) or kilometers and liters (L/100 km).
Fix the highlighted fields to see your result.
Fuel cost—
- Fuel needed
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- Per person
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- Fuel economy equivalent
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How it is calculated
Gallons = Miles ÷ MPG · Cost = Gallons × Price
Liters = Km × (L/100 km) ÷ 100 · Cost = Liters × Price
Assumptions and limitations
- Fuel economy is constant for the whole trip.
- Tolls, parking and vehicle wear are not included.
- Fuel prices change daily; we do not show live prices.
This tool is educational and provides estimates. It is not a credit offer or financial advice. Actual terms are set by each institution.
Frequently asked questions
How do I calculate the gas cost of a trip?
Divide the distance by your car’s miles per gallon to get the gallons you need, then multiply by the price per gallon. 300 miles ÷ 30 mpg = 10 gallons × $3.50 = $35.
Where do I find my car’s fuel economy?
On the window sticker, in the owner’s manual or on FuelEconomy.gov, the official U.S. site from the Department of Energy and the EPA. Real mileage depends on speed, traffic, load and weather.
How do I convert MPG to liters per 100 km?
Divide 235.215 by the MPG. 30 mpg ≈ 7.84 L/100 km. The calculator also shows the equivalent.