# Watt-Hours to Gigajoules Converter

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

Results in Gigajoules: 1 Wh = 3.6E-6 GJ
Hint: use a scientific notation calculator to convert E notation to decimal

Do you want to convert gigajoules to watt-hours?

## How to Convert Watt-Hours to Gigajoules

To convert a measurement in watt-hours to a measurement in gigajoules, multiply the energy by the following conversion ratio: 3.6E-6 gigajoules/watt-hour.

Since one watt-hour is equal to 3.6E-6 gigajoules, you can use this simple formula to convert:

gigajoules = watt-hours × 3.6E-6

The energy in gigajoules is equal to the energy in watt-hours multiplied by 3.6E-6.

For example, here's how to convert 500,000 watt-hours to gigajoules using the formula above.
gigajoules = (500,000 Wh × 3.6E-6) = 1.8 GJ

## What is a Watt-Hour?

The watt-hour is a measure of electrical energy equal to one watt of power over a one hour period.

Watt-hours are usually abbreviated as Wh, although the formally adopted expression is W·h. The abbreviation W h is also sometimes used. For example, 1 watt-hour can be written as 1 Wh, 1 W·h, or 1 W h.

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.

## What is a Gigajoule?

One gigajoule is equal to 1,000,000,000 joules, which is 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 billions, or 109. Gigajoules can be abbreviated as GJ; for example, 1 gigajoule can be written as 1 GJ.

## Watt-Hour to Gigajoule Conversion Table

Table showing various watt-hour measurements converted to gigajoules.
Watt-hours Gigajoules
1 Wh 0.0000036 GJ
2 Wh 0.0000072 GJ
3 Wh 0.0000108 GJ
4 Wh 0.0000144 GJ
5 Wh 0.000018 GJ
6 Wh 0.0000216 GJ
7 Wh 0.0000252 GJ
8 Wh 0.0000288 GJ
9 Wh 0.0000324 GJ
10 Wh 0.000036 GJ
100 Wh 0.00036 GJ
1,000 Wh 0.0036 GJ
10,000 Wh 0.036 GJ
100,000 Wh 0.36 GJ
1,000,000 Wh 3.6 GJ

## 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