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energy · International · Modern

kilowatt-hour

kW·hexact
Record
M485
Definition quality
Standardized
Conversion mode
multiplicative
Calculator
Fully calculable

Definition

1 kWh = exactly 3.6×10^6 J.

Reference value

One kilowatt-hour is equal to 3,600,000 joules.

History & use

Common electrical-energy unit.

Modern use

Current-use record in the project inventory; exact scope should follow the definition and regional/system context shown here.

Did you know?

Energy, not power.

Sources & evidence

Source tier Tier A · confidence High

Related measurements

joule

J

energy · International · Modern

SI derived unit of energy and work; 1 J = 1 N·m = 1 kg·m²·s⁻².

calorie

cal

energy · International · Modern / historical

The generic calorie is variant-dependent; NIST lists thermochemical, International Table, mean, 15 °C, and 20 °C calories.

variant

kilocalorie

kcal

energy · International · Modern / historical

A kilocalorie is 1000 calories, so its joule value depends on the calorie convention.

variant

British thermal unit

Btu

energy · International · Modern / historical

British thermal unit is variant-dependent; NIST lists IT, thermochemical, mean, and temperature-specific forms.

variant

electronvolt

eV

energy · International · Modern / historical

Non-SI unit accepted for use with the SI; 1 eV = exactly 1.602176634×10⁻¹⁹ J.