How do I convert MPG (UK) to MPG (US)?

Use the formula shown above or enter a value to see MPG (UK) converted to MPG (US) instantly.

What is the formula for MPG (UK) to MPG (US)?

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

When should I use MPG (UK) vs MPG (US)?

MPG (UK) and MPG (US) 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 MPG (UK) to MPG (US)

Use the live converter below to translate between Mile per Gallon (UK) (MPG (UK)) and Mile per Gallon (US) (MPG (US)). Scroll further for quick examples, formula tips, and related units.

Formula insight: Direct fuel economy conversions use multiplication by the conversion factor to account for different distance and volume units.

Convert

MPG (UK) → MPG (US)

Mile per Gallon (UK)

MPG (UK)

Mile per Gallon (US)

0.8327

MPG (US)

Rounded result (4 decimals max)

Formula

1 MPG (UK) = 0.8327 MPG (US)

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 (US) to MPG (UK).

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MPG (UK) to MPG (US) quick table

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

Mile per Gallon (UK) (MPG (UK))	Mile per Gallon (US) (MPG (US))
2 MPG (UK)	1.6653 MPG (US)
4 MPG (UK)	3.3307 MPG (US)
6 MPG (UK)	4.996 MPG (US)
8 MPG (UK)	6.6614 MPG (US)
10 MPG (UK)	8.3267 MPG (US)
15 MPG (UK)	12.4901 MPG (US)
20 MPG (UK)	16.6535 MPG (US)

MPG (US) back to MPG (UK)

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

Mile per Gallon (US) (MPG (US))	Mile per Gallon (UK) (MPG (UK))
2 MPG (US)	2.4019 MPG (UK)
4 MPG (US)	4.8038 MPG (UK)
6 MPG (US)	7.2057 MPG (UK)
8 MPG (US)	9.6076 MPG (UK)
10 MPG (US)	12.0095 MPG (UK)
15 MPG (US)	18.0142 MPG (UK)
20 MPG (US)	24.019 MPG (UK)