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

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

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

The converter calculates mi/kWh by applying the category-specific conversion factor for Fuel Economy.

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

MPG (UK) and mi/kWh 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 mi/kWh

Use the live converter below to translate between Mile per Gallon (UK) (MPG (UK)) and Mile per kWh (mi/kWh). 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) → mi/kWh

Mile per Gallon (UK)

MPG (UK)

Mile per kWh

0.0247

mi/kWh

Rounded result (4 decimals max)

Formula

1 MPG (UK) = 0.0247 mi/kWh

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
Alternative Fuels Data Center: Fuel Properties Comparison
U.S. Department of Energy. Lists gasoline energy content, used alongside the EPA MPGe consumer-label constant (33,705 Wh/gallon, about 8.90 kWh per liter) to convert between liquid-fuel efficiency (km/L) and EV metrics (km/kWh, kWh/100 km, Wh/km). View source
Petroleum-Equivalent Fuel Economy Calculation — 10 CFR 474.3
U.S. Department of Energy. EPA's consumer MPGe label uses a fixed 33,705 Wh/gallon energy-equivalence constant from five-cycle dynamometer testing, while a separate Petroleum Equivalency Factor for manufacturer CAFE compliance credit is being phased down from 82,049 to 28,996 Wh/gallon between model years 2010 and 2030 — two different constants for two different purposes. View source

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

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Try a real EV

Pick a model to fill in its EPA-rated efficiency.

Range & charging cost estimator

Based on Tesla Model 3 RWD (25.7 kWh/100mi, EPA-rated).

Usable battery (kWh)

Electricity price ($/kWh)

Estimated range

292 mi

Cost per charge

$12.00

Cost per mile

$0.041

MPG (UK) to mi/kWh 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 kWh (mi/kWh)
2 MPG (UK)	0.0494 mi/kWh
4 MPG (UK)	0.0988 mi/kWh
6 MPG (UK)	0.1482 mi/kWh
8 MPG (UK)	0.1976 mi/kWh
10 MPG (UK)	0.247 mi/kWh
15 MPG (UK)	0.3706 mi/kWh
20 MPG (UK)	0.4941 mi/kWh

mi/kWh back to MPG (UK)

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

Mile per kWh (mi/kWh)	Mile per Gallon (UK) (MPG (UK))
2 mi/kWh	80.956 MPG (UK)
4 mi/kWh	161.9121 MPG (UK)
6 mi/kWh	242.8681 MPG (UK)
8 mi/kWh	323.8241 MPG (UK)
10 mi/kWh	404.7802 MPG (UK)
15 mi/kWh	607.1703 MPG (UK)
20 mi/kWh	809.5603 MPG (UK)