complete.tools

Watt-Hour Converters

Convert watt-hours to and from kilowatt-hours, joules, BTU, and other energy units.

What this tool does

Convert watt-hours to and from kilowatt-hours, joules, BTU, and other energy units. Type an amount in watt-hours, choose the units, and the tool converts it to kilowatt-hours. It offers 10 energy units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one from 10 options, including Watt-hour, Kilowatt-hour, Megawatt-hour, Joule, Kilojoule, Megajoule. Starts as Watt-hour.
  • To: Choose one of the same 10 units as "From". Starts as Kilowatt-hour.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from watt-hours to kilowatt-hours:

  • 1 Wh = 0.001 kWh
  • 5 Wh = 0.005 kWh
  • 10 Wh = 0.01 kWh
  • 50 Wh = 0.05 kWh
  • 100 Wh = 0.1 kWh

Multiply the number of watt-hours by 0.001 to get kilowatt-hours. Both units are exact definitions, so 0.001 is the exact factor: 1 Wh = 0.001 kWh.

Sources: Watt-hour: exact by definition. Kilowatt-hour: exact by definition.

Limitations

  • Converts units of energy only. It does not work out energy from power, time, voltage or charge.

FAQs

Q: How many kilowatt-hours are in one watt-hour?
A: One watt-hour is 0.001 kilowatt-hours. Change the value to convert any amount; the other units are listed below the result.
Q: Which definition of the units does this page use?
A: Calories here are thermochemical calories (1 cal = 4.184 J exactly), the definition commonly used in chemistry and nutrition. The International Table calorie (4.1868 J) is slightly larger. BTU here is the International Table BTU (about 1055.06 J), the usual definition for heating and cooling. The thermochemical BTU is slightly smaller.
Q: Can I convert from kilowatt-hours to watt-hours?
A: Yes. Choose kilowatt-hour in the From box and watt-hour in the To box. One kilowatt-hour is 1000 watt-hours.

Explore Similar Tools

Explore more tools like this one: