How do I convert Wh/km to mi/kWh?

Use the formula shown above or enter a value to see Wh/km converted to mi/kWh instantly.

What is the formula for Wh/km to mi/kWh?

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

When should I use Wh/km vs mi/kWh?

Wh/km 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 Wh/km to mi/kWh

Use the live converter below to translate between Watt-hour per kilometer (Wh/km) 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

Wh/km → mi/kWh

Watt-hour per kilometer

Wh/km

Mile per kWh

621.3712

mi/kWh

Rounded result (4 decimals max)

Formula

1 Wh/km = 621.3712 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 lower heating value (about 32 MJ/gal, which is roughly 9.5 kWh per liter), letting the app convert between liquid-fuel efficiency (km/L) and EV metrics (km/kWh, kWh/100 km, Wh/km). View source

Results update as you type. Swap the direction to convert back from mi/kWh to Wh/km.

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Wh/km 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.

Watt-hour per kilometer (Wh/km)	Mile per kWh (mi/kWh)
2 Wh/km	310.6856 mi/kWh
4 Wh/km	155.3428 mi/kWh
6 Wh/km	103.5619 mi/kWh
8 Wh/km	77.6714 mi/kWh
10 Wh/km	62.1371 mi/kWh
15 Wh/km	41.4247 mi/kWh
20 Wh/km	31.0686 mi/kWh

mi/kWh back to Wh/km

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

Mile per kWh (mi/kWh)	Watt-hour per kilometer (Wh/km)
2 mi/kWh	310.6856 Wh/km
4 mi/kWh	155.3428 Wh/km
6 mi/kWh	103.5619 Wh/km
8 mi/kWh	77.6714 Wh/km
10 mi/kWh	62.1371 Wh/km
15 mi/kWh	41.4247 Wh/km
20 mi/kWh	31.0686 Wh/km