Fuel Economy Converter (MPG, L/100km, km/L)
This tool helps you convert fuel economy measurements between miles per gallon (MPG), liters per 100 kilometers (L/100km), and kilometers per liter (km/L). It's ideal for drivers, vehicle enthusiasts, and engineers who need to understand and compare fuel efficiency in different units.
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Data Source and Methodology
All calculations are based on standard fuel economy conversion formulas and data sourced from reliable automotive engineering references. All calculations are strictly based on the formulas and data provided by this source.
The Formula Explained
The conversion formulas are as follows:
- MPG to L/100km: \( \text{L/100km} = \frac{235.215}{\text{MPG}} \)
- MPG to km/L: \( \text{km/L} = \text{MPG} \times 0.425144 \)
- L/100km to MPG: \( \text{MPG} = \frac{235.215}{\text{L/100km}} \)
- L/100km to km/L: \( \text{km/L} = \frac{100}{\text{L/100km}} \)
- km/L to MPG: \( \text{MPG} = \text{km/L} \times 2.35215 \)
- km/L to L/100km: \( \text{L/100km} = \frac{100}{\text{km/L}} \)
Glossary of Terms
- MPG: Miles per gallon, a measure of fuel efficiency in the imperial system.
- L/100km: Liters per 100 kilometers, a measure of fuel consumption in the metric system.
- km/L: Kilometers per liter, another metric measure of fuel efficiency.
How It Works: A Step-by-Step Example
Suppose you have a vehicle with a fuel economy of 30 MPG. To convert this to L/100km, use the formula: \( \text{L/100km} = \frac{235.215}{30} \approx 7.84 \). This means the vehicle consumes approximately 7.84 liters of fuel to travel 100 kilometers.
Frequently Asked Questions (FAQ)
What is the most efficient fuel economy unit?
Efficiency is often measured in L/100km or km/L, but which is more effective depends on the context, as they're simply different representations.
How do I convert between these units?
You can use the formulas provided or our calculator tool to easily switch between the units.
Is this calculator accurate?
Yes, it uses standard mathematical formulas to ensure precise conversions.
Why are there different units for fuel economy?
Different countries use different standards; MPG is common in the US, while L/100km is used in many other countries.
Does this calculator consider vehicle type?
No, it's solely a unit converter. Vehicle-specific consumption can vary based on many other factors.
Formula (LaTeX) + variables + units
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- NIST — Weights and measures — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/weights-and-measures - NIST — SI units — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/owm/metric-si/si-units
Last code update: 2026-01-19
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