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kWh to Joules

Convert kilowatt-hours to joules instantly.

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Formula

1 kWh = 3,600,000 joules

Unit Relationship

Kilowatt-hours and joules both measure energy. One kilowatt-hour equals exactly 3,600,000 joules, so convert kWh to joules by multiplying by 3,600,000.

Worked Example

For 1 kWh: 1 × 3,600,000 = 3,600,000 J.

Unit Definitions

kWh: A kilowatt-hour is the energy used when one kilowatt of power is sustained for one hour. It is commonly used for electrical energy consumption.

Joules: The joule is the SI unit of energy. One joule is equal to one watt-second.

Practical Uses

converting electricity consumption from kilowatt-hours into SI energy units
engineering and physics calculations that require energy in joules
comparing electrical energy with mechanical or thermal energy
translating utility-scale energy values into scientific units

Precision and Rounding

The relationship 1 kWh = 3,600,000 J is exact. Display rounding affects presentation only, not the conversion factor.

Important Notes

A kilowatt-hour measures energy, not power.
One kilowatt-hour is exactly 3.6 megajoules.
Do not confuse kilowatts, which measure power, with kilowatt-hours, which measure energy.

Quick Reference

kWh	Joules
1	3600000
5	18000000
10	36000000
100	360000000

Frequently Asked Questions

How do you convert kWh to joules?

Multiply the number of kilowatt-hours by 3,600,000.

How many joules are in 1 kWh?

There are exactly 3,600,000 joules in 1 kilowatt-hour.

Is a kilowatt-hour a unit of power?

No. A kilowatt-hour is a unit of energy, while a kilowatt is a unit of power.

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