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Automotive · Free tool

Fuel Economy Converter

MPG (US) ↔ MPG (UK) ↔ L/100km ↔ km/L. All four values side by side with efficiency tier labels.

Updated April 2026
30 MPG (US) =
7.84 L/100 km
Efficiency tier: Good (mid-size sedan)
Reference table
MPG (US)
30.00
MPG (UK)
36.03
L/100 km
7.84
km/L
12.75
How it works
MPG (US) to L/100km uses 235.215 / MPG. MPG (UK) gallons are larger, so 282.481 / MPG. L/100km and km/L are reciprocals scaled by 100. Lower L/100km is better; higher MPG & km/L are better.
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What it does

Converting fuel economy between regions is weirdly mathy. All four values at once, with a tier label so you know “35 MPG” is respectable.

Runs entirely in your browser — no upload, no account, no watermark. For more tools in this category see the full tools index.

Embed this tool on your siteShow snippet

Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.

<iframe src="https://freetoolarena.com/embed/fuel-economy-converter" width="100%" height="720" frameborder="0" loading="lazy" title="Fuel Economy Converter" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>
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How to use it

  1. Enter value + from-unit.
  2. Pick target unit.
  3. Read the full 4-way table.

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