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L/100 km to MPG Converter

Convert fuel economy among L/100 km, US MPG and UK MPG.

✓ Method reviewed · 2026-08-22
CALCULATORHow do I convert L/100 km to US or UK MPG?

Results are for information and preliminary estimation. For critical technical work, manufacturer data, local codes and qualified professional review take precedence.

CALCULATION ENGINEFUEL-ECONOMY-CONVERT · R1.5.1Engine and route QA: PASS · Method and limits visible
Trust & methodology →
1Enter real inputs
2Press Calculate
3Read result with assumptions
Method & assumptions

How is it calculated?

US MPG ≈ 235.214583 / (L/100 km). UK MPG ≈ 282.480936 / (L/100 km). The metrics run in opposite directions.

Example

Example: 6.5 L/100 km is about 36.2 US MPG and 43.5 UK MPG.

What questions does this tool answer?

  • How do I convert L/100 km to US or UK MPG?
  • mpg to l100km
  • l100km to mpg
  • How is L/100 km to MPG Converter calculated?
WHAT CHANGES THE RESULT

Check these before using the estimate

Automotive estimates are highly sensitive to driving conditions. For consumption, tire sizing and charging, the vehicle manufacturer’s approved limits remain the final reference.

  • Real consumption, speed, traffic, load and weather
  • Vehicle and tire manufacturer approvals and geometry
  • Charging losses and usable battery window
  • Fuel, toll and energy prices changing over time
FAQ

Frequently asked questions

Why are US and UK MPG different?+

US and Imperial gallons have different volumes.

Does higher MPG mean lower consumption?+

Yes. MPG measures distance per fuel while L/100 km measures fuel per distance.