How much will my trip cost in gas?

Estimate a trip's gasoline gallons and fuel budget from total miles, miles per gallon and price per gallon, without tolls or lodging. Calculate it clearly with Figur.

Turn trip miles and MPG into a fuel budget

Gallons needed = total trip miles ÷ miles per gallon (MPG). Fuel cost = gallons × price per gallon. Enter the full planned distance, including the return leg if needed; this calculator does not double the distance automatically. Use miles, MPG and a price for the same gallon unit. The cost uses unrounded gallons even though the displayed fuel quantity is rounded.

Method and assumptions

Gallons = distance ÷ MPG. Trip fuel cost = (distance ÷ MPG) × price per gallon.

  • MPG and price remain constant for the whole distance. No live fuel prices or route lookup are used.
  • Fuel units must match: do not mix US MPG with an imperial-gallon price or liters without conversion.
  • Tolls, parking, lodging, food and vehicle wear are excluded. Traffic, idling, terrain and weather can change actual MPG.

Fuel-budget estimate, not a guaranteed travel price. Verify your total route distance, real-world MPG and local fuel price.

Sources and references

Worked example

Drive 320 total miles at 28 MPG with gasoline at $3.45 per gallon.

320 ÷ 28 = 11.4286 gallons. Multiply the unrounded amount by $3.45 for a fuel budget of $39.43.

Frequently asked questions

Does it include the return trip?

Only if the distance you enter includes it. For a 160-mile outbound leg and the same return, enter 320 miles.

Does it use current gas prices?

No. Enter a local price yourself. The calculator does not fetch station prices or driving routes.

Does it show the whole travel budget?

No. The result is fuel only. Add tolls, parking, lodging and other expenses separately.

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