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Convert miles per gallon to liters per 100 kilometers. Used by drivers switching between US and European fuel economy standards.
Fuel Efficiency Converter converts between all major vehicle fuel economy units — US Miles Per Gallon (MPG), Imperial MPG, Litres per 100 Kilometres (L/100km), and Kilometres per Litre (km/L). Enter a value in any unit and see instant conversions across all four. Useful for comparing fuel efficiency ratings between American, European, and Asian vehicles.
Designed for direct use without extra steps or inflated trust claims.
Fuel Efficiency Converter is a privacy-first web utility engineered for direct, browser-level execution. Convert fuel efficiency units: MPG ↔ L/100km ↔ km/L. Supports US MPG, Imperial MPG, and metric units. Operating entirely within your local browser environment, it delivers fast, responsive transformations without requiring third-party software installation or remote server data transmission. Built for zero-latency execution, Fuel Efficiency Converter eliminates network round-trips by computing results directly within your device session. Whether you are running routine fuel efficiency converter workflows or fine-tuning output parameters for fuel economy converter, all data remains isolated in volatile memory with instant feedback.
Step 1: Enter a fuel efficiency value
Type your fuel efficiency value (e.g., 30 MPG or 8.5 L/100km) in the input field of your chosen unit.
Step 2: View all converted values
The converter instantly shows equivalent values in all other units: US MPG, Imperial MPG, L/100km, and km/L.
Step 3: Compare with vehicle benchmarks
Use the unit comparison table to see how your vehicle compares to common fuel efficiency ratings across regions.
To convert US MPG to L/100km, divide 235.215 by the MPG value. For example, 30 MPG = 235.215 ÷ 30 = 7.84 L/100km. The converter on this page does this calculation automatically.
US MPG uses the US gallon (3.785 litres) while Imperial MPG uses the UK gallon (4.546 litres). This means Imperial MPG values are about 20% higher than US MPG for the same car. A car rated at 30 US MPG would be approximately 36 Imperial MPG.
To convert L/100km to km/L, divide 100 by the L/100km value. For example, 8 L/100km = 100 ÷ 8 = 12.5 km/L. Lower L/100km values indicate better fuel efficiency.
Yes, completely free. No registration, no ads interrupting your workflow, and no watermarks. All conversions happen instantly in your browser.
All string manipulation, regex matching, and character transformations execute directly in your browser's JavaScript thread.
Yes. It offers full UTF-8 and Unicode support for multi-lingual text, accented characters, emoji, and non-Latin scripts.
It can handle large text documents with tens of thousands of lines, constrained only by your device's available memory.
Yes. Output options allow you to maintain, normalize, or convert line break conventions across Windows, macOS, and Linux formats.
Yes. Dedicated copy-to-clipboard buttons allow instant copying with visual confirmation.
Yes. Nothing you paste is logged, transmitted, or cached on any remote server.
Engineered for high-security, client-side browser execution with zero network transmission.
Client V8 & WASM
Computed in local browser memory with zero upload lag.
0 Bytes Transmitted
No payload uploads, database logs, or external API relays.
Volatile RAM Only
Inputs automatically purged when the page or tab is closed.
Clean & Unwatermarked
Native format downloads and clipboard synchronization.
Need alternatives or related utilities? Explore more in Utilities or view the complete tools directory.
This tool processes all inputs locally in your browser. Your files and data are never uploaded to our servers, keeping them 100% private.