Watt-seconds to Gigajoules Conversion

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

Results in Gigajoules:
Loading content.
1 Ws = 1.0E-9 GJ
Hint: use a scientific notation calculator to convert E notation to decimal

How to Convert Watt-seconds to Gigajoules

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

Since one gigajoule is equal to 1,000,000,000 watt-seconds, you can use this simple formula to convert:

gigajoules = watt-seconds ÷ 1,000,000,000

The energy in gigajoules is equal to the watt-seconds divided by 1,000,000,000.

For example, here's how to convert 500,000,000 watt-seconds to gigajoules using the formula above.
500,000,000 Ws = (500,000,000 ÷ 1,000,000,000) = 0.5 GJ

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


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]


One gigajoule is equal to 1,000,000,000 joules, which are the energy equal to the force on an object of one newton at a distance of one meter.

The gigajoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "giga" is the prefix for 109. Gigajoules can be abbreviated as GJ; for example, 1 gigajoule can be written as 1 GJ.

Watt-second to Gigajoule Conversion Table

Watt-second measurements converted to gigajoules
Watt-seconds Gigajoules
1 Ws 0.000000001 GJ
2 Ws 0.000000002 GJ
3 Ws 0.000000003 GJ
4 Ws 0.000000004 GJ
5 Ws 0.000000005 GJ
6 Ws 0.000000006 GJ
7 Ws 0.000000007 GJ
8 Ws 0.000000008 GJ
9 Ws 0.000000009 GJ
10 Ws 0.00000001 GJ
100 Ws 0.0000001 GJ
1,000 Ws 0.000001 GJ
10,000 Ws 0.00001 GJ
100,000 Ws 0.0001 GJ
1,000,000 Ws 0.001 GJ
10,000,000 Ws 0.01 GJ
100,000,000 Ws 0.1 GJ
1,000,000,000 Ws 1 GJ


  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

More Watt-second & Gigajoule Conversions