Fuel Cost Calculator

Use it when your task matches one of these common needs: Estimate fuel cost for a trip before driving. Compare one-way and round-trip fuel cost. It works best when you already know your one-way miles, expected MPG, price per gallon, and whether the trip is round trip.

In plain language: The calculator divides trip miles by miles per gallon to estimate gallons needed, then multiplies gallons by the price per gallon. The examples on the page are there so you can compare your inputs with a worked example before copying the answer.

One-way distance: Enter the miles from start to destination once. Turn on round trip if you are coming back the same way. Fuel economy: Use the MPG you expect for this trip. EPA label MPG is helpful, but traffic, speed, and load can move the real number. Fuel price: Enter the price per gallon you expect to pay at the pump, not an old saved price. Round trip: Leave it off for one-way driving. Turn it on to double the distance before the fuel cost is calculated.

Read the headline answer, then check the smaller lines beside it. For everyday tools, those lines usually show the distance, time, cost, units, or setting that made the answer change.

Real fuel cost changes with traffic, speed, weather, terrain, vehicle load, maintenance, fuel blend, driving style, and the actual price you pay. Also check that the distance is one-way, the round-trip switch matches the trip, the MPG fits your actual driving, and the gas price is the price you expect to pay.

No. You enter the fuel price yourself. Check a local station, a route app, or a current price source first, then put that price per gallon into the calculator.

Use your real MPG if you know it from recent driving. EPA MPG is a useful starting point, but hills, speed, traffic, weather, cargo, tires, and driving style can change the trip result.

No. This is fuel-only. Add tolls, parking, rental fees, tire wear, maintenance, and other travel costs separately if you need the full trip budget.

The IRS standard mileage rate is a broad tax or reimbursement rate. This calculator only estimates fuel cost from gallons and price per gallon, so it will usually be much lower.

Cost per mile is fuel price divided by MPG. For example, $3.75 per gallon at 28 MPG is about 13.4 cents of fuel per mile.

No. The calculator runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.