Watt-Seconds to Kilowatt-Hours Converter

Enter the energy in watt-seconds below to get the value converted to kilowatt-hours.


Result in Kilowatt-Hours:

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1 Ws = 2.7778E-7 kWh
Hint: use a scientific notation calculator to convert E notation to decimal

Do you want to convert kilowatt-hours to watt-seconds?

How to Convert Watt-Seconds to Kilowatt-Hours

To convert a measurement in watt-seconds to a measurement in kilowatt-hours, divide the energy by the following conversion ratio: 3,600,000 watt-seconds/kilowatt-hour.

Since one kilowatt-hour is equal to 3,600,000 watt-seconds, you can use this simple formula to convert:

kilowatt-hours = watt-seconds ÷ 3,600,000

The energy in kilowatt-hours is equal to the energy in watt-seconds divided by 3,600,000.

For example, here's how to convert 5,000,000 watt-seconds to kilowatt-hours using the formula above.
kilowatt-hours = (5,000,000 Ws ÷ 3,600,000) = 1.388889 kWh

Watt-seconds and kilowatt-hours are both units used to measure energy. Keep reading to learn more about each unit of measure.

What Is a Watt-Second?

The watt-second is a measure of electrical energy equal to one watt of power over a one second period. One watt-second is equal to 1/3,600 of a watt-hour or one joule.

Watt-seconds are usually abbreviated as Ws, although the formally adopted expression is W·s. The abbreviation W s is also sometimes used. For example, 1 watt-second can be written as 1 Ws, 1 W·s, or 1 W s.

In formal expressions, the centered dot (·) or space is used to separate units used to indicate multiplication in an expression and to avoid conflicting prefixes being misinterpreted as a unit symbol.[1]

Learn more about watt-seconds.

What Is a Kilowatt-Hour?

A kilowatt-hour is a measure of electrical energy equal to one kilowatt, or 1,000 watts, of power over a one hour period. Kilowatt-hours are a measure of electrical work performed over a period of time, and are often used as a way of measuring energy usage by electric companies.

Kilowatt-hours are usually abbreviated as kWh, although the formally adopted expression is kW·h. The abbreviation kW h is also sometimes used. For example, 1 kilowatt-hour can be written as 1 kWh, 1 kW·h, or 1 kW h.

Learn more about kilowatt-hours.

Watt-Second to Kilowatt-Hour Conversion Table

Table showing various watt-second measurements converted to kilowatt-hours.
Watt-seconds Kilowatt-hours
1 Ws 0.00000027778 kWh
2 Ws 0.00000055556 kWh
3 Ws 0.00000083333 kWh
4 Ws 0.0000011111 kWh
5 Ws 0.0000013889 kWh
6 Ws 0.0000016667 kWh
7 Ws 0.0000019444 kWh
8 Ws 0.0000022222 kWh
9 Ws 0.0000025 kWh
10 Ws 0.0000027778 kWh
100 Ws 0.000027778 kWh
1,000 Ws 0.000278 kWh
10,000 Ws 0.002778 kWh
100,000 Ws 0.027778 kWh
1,000,000 Ws 0.277778 kWh
10,000,000 Ws 2.7778 kWh


  1. Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019, https://www.bipm.org/documents/20126/41483022/SI-Brochure-9-EN.pdf

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