Gas Cost Calculator
Estimate fuel needed, trip cost, cost per mile, and annual fuel cost from MPG and gas price.
- Last reviewed
- July 8, 2026
- Cost
- Free to use
- Data
- Runs in your browser
Fuel Needed
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Weekly Trip Cost
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Cost per Mile
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Estimated Annual Cost
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Methodology
How this calculator handles inputs
This calculator uses the values you enter above and applies the formula explained in the guide below. Results update in the browser and are intended for quick planning, comparison, and sanity-checking.
- Use consistent periods, currencies, and units across inputs.
- Review any assumptions before using the result in a decision.
- Recalculate when rates, prices, tax rules, or business terms change.
Guide
How it works
Use this calculator to estimate fuel cost from distance, vehicle MPG, gas price, and trips per week.
What this calculator does
The gas cost calculator estimates fuel needed, weekly trip cost, cost per mile, and annualized fuel cost.
Formula
Gallons used = miles / MPG
Fuel cost = gallons used x gas price
How to use it
Enter trip distance, your vehicle miles per gallon, gas price per gallon, and how many times you make the trip each week.
Common mistakes
- using highway MPG for city driving
- forgetting return-trip distance
- using outdated fuel prices
FAQs
Can I use this for commuting?
Yes. Enter the weekly commute distance or enter one round trip and the number of trips per week.
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