Trip estimates

Gas Mileage Calculator

Calculate your vehicle's fuel efficiency in MPG and estimate trip fuel costs. Use this Travel and transport tool to enter your numbers, review the result, and understand the key assumptions before making the next decision.

What you get
A focused calculator, clear explanation, common questions, and useful next tools.
Quick intro
Calculator
Result
Explanation
Common questions
Related tools

Calculator tool

How this calculator works
The result depends on the numbers you enter and the assumptions shown below.

MPG = Miles driven ÷ Gallons used. Trip cost = (Miles ÷ MPG) × gas price. The average new US car gets about 28 MPG.

Review the inputs carefully and treat the output as an estimate. For decisions involving money, taxes, health, law, or security, compare the result with trusted professional guidance when needed.

Frequently asked questions

How do I improve my MPG?

Maintain steady speeds, keep tires properly inflated, avoid hard acceleration/braking, remove excess weight, and keep up with maintenance (air filters, spark plugs, oil changes).