Fuel Economy Converter
Convert between 6 fuel-efficiency units — km/L, mile per US gallon, mile per UK gallon, L/100km, gallon per 100 miles, mile per liter. Reciprocal (L/100km) math handled correctly.
What powers the Fuel Economy Converter
6 fuel-economy units including reciprocal (L/100km)
US gallon AND UK gallon both supported
Reciprocal math handled correctly — higher km/L = lower L/100km
Indian km/L, EU L/100km, US/UK mpg all in one tool
Why the Fuel Economy Converter is different
Browser-native
The Fuel Economy Converter runs entirely in your browser. Input is processed locally — never uploaded, never logged, never cached anywhere outside your device.
No artificial limits
No daily quotas, no character ceilings, no "upgrade for more" walls. Every feature is the complete feature — the same on the first use as the thousandth.
Production-grade quality
Built to the same engineering bar as paid SaaS tools — accurate algorithms, audited logic, responsive design and accessibility-tested interactions.
Common use contexts
- Comparing car spec sheets across regions
- Calculating road-trip cost from rated economy
- EV "equivalent MPG" comparisons against gas vehicles
- Truck / fleet fuel efficiency analysis
Private and secure
Zero upload
All processing happens in your browser. Input is never transmitted, logged or cached.
Works offline
Once the page loads, the tool runs without an internet connection. No network calls happen during use.
No tracking
No accounts, no cookies for tool state. Only aggregate analytics count visits at the page level.