Work out kilowatt hour to joule instantly with clear inputs, formula shown and shareable results.
Converting Kilowatt-hours to Joules is one multiplication: a single kWh is 3600000 J, so the amount is scaled by that factor. Reversing the direction divides by the same factor. The factor is an exact definition rather than a rounded figure, so the result stays precise at any magnitude. A watt is one joule per second, so one kilowatt sustained for 3,600 seconds is 3.6 million joules exactly.
Kilowatt-hours → Joules
J = kWh × 3600000
Joules → Kilowatt-hours
kWh = J ÷ 3600000
One kWh equals 3600000 J. That value is exact by definition.
Divide by 3600000 rather than multiplying, or flip the direction selector which does it for you.