Joules to kWh Converter

Convert energy between joules and kWh using the exact 3,600,000 joules per kilowatt-hour relationship.

Joules (J)

Kilowatt-hours (kWh)

—1 J = 2.77778e-7 kWh

Energy conversion, runtime & cost workbench

Convert energy across J, kJ, MJ, Wh and kWh, then translate the same energy into appliance runtime and electricity cost.

Known unitEnergy valuePower draw (W)Electricity price / kWh

—Joules

—kWh

—Runtime at selected power

—Energy cost

Unit	Equivalent

Energy and power are different quantities: runtime uses energy ÷ power and assumes constant power draw.