# Watt-seconds to Kilowatt-hours Conversion

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

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

## How to Convert Watt-seconds to Kilowatt-hours

To convert a watt-second measurement to a kilowatt-hour measurement, divide the energy by the conversion ratio.

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 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.
5,000,000 Ws = (5,000,000 ÷ 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.

## Watt-seconds

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.

## Kilowatt-hours

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.

## Watt-second to Kilowatt-hour Conversion Table

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

## References

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