How do I convert L/100mi to MPG (UK)?

Use the formula shown above or enter a value to see L/100mi converted to MPG (UK) instantly.

What is the formula for L/100mi to MPG (UK)?

The converter calculates MPG (UK) by applying the category-specific conversion factor for Fuel Economy.

When should I use L/100mi vs MPG (UK)?

L/100mi and MPG (UK) are both part of the Fuel Economy category; pick the unit that matches your measurement context (e.g., scale, region, or industry standard).

Fuel Economy & Efficiency Reference

Convert L/100mi to MPG (UK)

Use the live converter below to translate between Liter per 100 miles (L/100mi) and Mile per Gallon (UK) (MPG (UK)). Scroll further for quick examples, formula tips, and related units.

Formula insight: Converting between efficiency (km/L, MPG) and consumption (L/100km) units requires using the inverse relationship: consumption = 100 ÷ efficiency.

Convert

L/100mi → MPG (UK)

Liter per 100 miles

L/100mi

Mile per Gallon (UK)

454.609

MPG (UK)

Rounded result (4 decimals max)

Formula

1 L/100mi = 454.609 MPG (UK)

Conversion sourcesTap or click to view references

The International System of Units (SI) — NIST Special Publication 330
National Institute of Standards and Technology (NIST). The SI Brochure (SP 330) is the definitive English edition of the BIPM SI tables. NIST’s edition lists the official constants and conversion factors tying inch-pound units to SI, which SwapUnits applies for length, mass, temperature, pressure, volume, and related conversions. See /standards/nist-si-tenfold for the complete decimal multiple/submultiple table. View source · View SI table
Fuel Economy Guide (Model Year 2024)
U.S. Environmental Protection Agency & U.S. Department of Energy. Describes how MPG, km/L, and L/100 km ratings are calculated for the U.S. Monroney label and how to interpret efficiency versus consumption metrics. View source

Results update as you type. Swap the direction to convert back from MPG (UK) to L/100mi.

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L/100mi to MPG (UK) quick table

Multiply any row by the same factor to scale results. Use the converter above to enter exact values with your own units.

Liter per 100 miles (L/100mi)	Mile per Gallon (UK) (MPG (UK))
2 L/100mi	227.3045 MPG (UK)
4 L/100mi	113.6523 MPG (UK)
6 L/100mi	75.7682 MPG (UK)
8 L/100mi	56.8261 MPG (UK)
10 L/100mi	45.4609 MPG (UK)
15 L/100mi	30.3073 MPG (UK)
20 L/100mi	22.7305 MPG (UK)

MPG (UK) back to L/100mi

Keep the reciprocal handy when double-checking calculations or undoing a conversion.

Mile per Gallon (UK) (MPG (UK))	Liter per 100 miles (L/100mi)
2 MPG (UK)	227.3045 L/100mi
4 MPG (UK)	113.6523 L/100mi
6 MPG (UK)	75.7682 L/100mi
8 MPG (UK)	56.8261 L/100mi
10 MPG (UK)	45.4609 L/100mi
15 MPG (UK)	30.3073 L/100mi
20 MPG (UK)	22.7305 L/100mi