Energy Converter

Convert between chemical, electrical and physical energy units.

Energy
6
Printable Chart
Related Conversions
1 J to kWh 25 J to kWh 50 J to kWh 100 J to kWh 250 J to kWh 2,500 J to kWh 25,000 J to kWh 100,000 J to kWh 450,000 J to kWh 2,000,000 J to kWh 5,000,000 J to kWh 10,000,000 J to kWh
Reverse Conversions
5 kWh to J 500 kWh to J 10,000 kWh to J 25,000 kWh to J 100,000 kWh to J 400,000 kWh to J 450,000 kWh to J 800,000 kWh to J 1,200,000 kWh to J 2,000,000 kWh to J 5,000,000 kWh to J 10,000,000 kWh to J
More Energy Conversions
1 MJ to BTU 100 J to cal 1 GJ to kWh 1 GJ to MJ 2 MJ to BTU 100 kJ to kcal 1 MJ to kWh 2 GJ to MJ 10 BTU to J 250 cal to J

Trending Now

Days Until Halloween Days Until New Year 1 acre to m² Days Until Christmas Percentage Calculator Age Calculator 70 kg to pounds 350 °F to °C FIFA World Cup 2026 55 mph to km/h

Recent Tools

Popular Conversions

Kilowatt-Hours to Megajoules Megajoules to Kilowatt-Hours Joules to Calories Kilocalories to Kilojoules British Thermal Units to Joules Watt-Hours to Joules

Common Benchmarks

Slice of bread 330 kJ
Phone battery 40 kJ
100 W bulb for 1 hour 0.1 kWh
Microwave 10 minutes 0.17 kWh
Gasoline liter 34 MJ
AA battery 10 kJ

Formula

kWh = J × 2.77777778e-7

Example

Example: convert 500000 joules to kilowatt-hours.

500000 J = 0.13888889 kWh

Conversion table

joules (J) kilowatt-hours (kWh)
1 J 2.77777778e-7 kWh
2 J 5.55555556e-7 kWh
5 J 0.00000139 kWh
10 J 0.00000278 kWh
20 J 0.00000556 kWh
50 J 0.00001389 kWh
100 J 0.00002778 kWh

Explanation

These are both units.

How to convert joules to kilowatt-hours

  1. Start with the value in joules (J).
  2. Multiply it by 2.77777778e-7.
  3. The result is the measurement in kilowatt-hours (kWh).

Example: 500000 J → 0.13888889 kWh

Frequently Asked Questions

How much is 500000 joules in kilowatt-hours?

500000 joules is about 0.138889 kilowatt-hours.

What is a joule?

A joule is a unit of energy.

What is a kilowatt-hour?

A kilowatt-hour is a unit of energy.

When are joules used?

It is used when working with energy measurements.

When are kilowatt-hours used?

It is used when working with energy measurements.

Why do some conversions produce very small or very large numbers?

The result can look tiny or huge because the units are meant for very different scales. A joule is used for everyday scales, while a kilowatt-hour is used for much larger scales. That’s why 1 kilowatt-hour equals 3,600,000 joules.