United States · Auto

Gas Cost Calculator

Estimate fuel cost from miles driven, vehicle MPG and gasoline price per gallon.

US units & dollarsRuns in your browserFormula & assumptions ↓

Your inputs

Your results

Enter your values and calculate to see the result.

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How this Gas Cost Calculator works

The calculator uses the values you enter and transparent arithmetic to produce a US-focused planning estimate. Change the assumptions to compare realistic scenarios rather than relying on a single default.

Formula and assumptions

Results use the displayed inputs only. Costs not represented by an input are excluded. Financing calculations use standard amortization mathematics where applicable.

Example and planning tips

Use current quotes for APR, fuel or electricity prices, trade-in values and dealer charges. Comparing several scenarios can show how term length, efficiency, rates and upfront cash affect total cost.

Important limitations

This tool is educational and does not constitute a lender quote, dealer offer, tax calculation or financial advice. Actual vehicle costs vary by state, lender, vehicle, driver and transaction.

Browse all US auto calculators.

How to use this calculator

  1. Set Miles driven (default 1000).
  2. Set Fuel economy (default 25).
  3. Set Gas price (default 3.5).
  4. Select Calculate to update the result. Reset restores the starting values.

Planning estimate only. Dealer fees, taxes, incentives, lender terms, insurance, depreciation and local rules can change actual costs unless explicitly included.

Maintained by the CalculatorsOnline Editorial Team. Read our methodology policy.