Gas Mileage & Fuel Cost Calculator

Gas Mileage & Fuel Cost Calculator: Measure fuel over the same trip; use US gallons.

Your Numbers

Distance (miles)

Fuel used (US gallons)

Price per gallon ($)

Results

Fuel economy (MPG)—

Trip fuel cost ($)—

Input check—

Results update live as you type. Estimates only — not financial, tax, or investment advice.

Add This Calculator to Your Website

Free to embed — copy the snippet below and paste it into your site's HTML. It stays up to date automatically and links back to this page.

<iframe id="cc-gas-mileage-fuel-cost-calculator" src="https://calccentral.xyz/embed/automotive/gas-mileage-fuel-cost-calculator/" title="Gas Mileage & Fuel Cost Calculator by CalcCentral" width="100%" height="728" loading="lazy" style="border:1px solid #e2e8f0;border-radius:12px;max-width:680px;width:100%;"></iframe>
<p style="font:12px/1.4 -apple-system,Segoe UI,Roboto,sans-serif;color:#64748b;margin:6px 0 0;max-width:680px;"><a href="https://calccentral.xyz/automotive/gas-mileage-fuel-cost-calculator/" target="_blank" rel="noopener">Gas Mileage & Fuel Cost Calculator</a> by CalcCentral</p>
<script>window.addEventListener("message",function(e){if(e.origin!=="https://calccentral.xyz")return;var d=e.data||{};if(d.ccSlug==="gas-mileage-fuel-cost-calculator"&&d.ccHeight){var f=document.getElementById("cc-gas-mileage-fuel-cost-calculator");if(f)f.style.height=d.ccHeight+"px";}});</script>

The Formula

MPG = miles ÷ gallons; trip cost = gallons × price

Understanding the Gas Mileage & Fuel Cost Calculator

300 miles using 10 gallons gives 30 MPG and costs $35 at $3.50 per gallon.

Measure fuel over the same trip; use US gallons.

Frequently Asked Questions

How is this calculated?

MPG = miles ÷ gallons; trip cost = gallons × price

What assumptions apply?

Measure fuel over the same trip; use US gallons.