Gigajoule to Watt Hour Converter
Energy · unit-converter
Convert Gigajoule to Watt Hour with fixed input and output units, a step-by-step formula line, and reference tables. Factors are joule-based; food energy uses thermochemical calories. The full Energy Converter also includes MMBtu, toe, thermal kWh, and MeV/GeV.
Calculator
From: Gigajoule (gj)
To: Watt Hour (wh)
About Gigajoule
One gigajoule is 1,000,000,000 J. Utility-scale and fuel-system reporting commonly use GJ.
About Watt Hour
One watt-hour is 3,600 J—the energy from 1 W for one hour. Common for small batteries and device ratings.
How to convert gigajoules to watt hours
1 gigajoule is equal to 277777.77777777775191 watt hour when both are expressed in joule-equivalents:
1 gj = (1,000,000,000 J ÷ 3,600 J) wh = 277777.77777777775191 wh
Each gigajoule is defined as 1,000,000,000 J and each watt hour as 3,600 J in this tool, so one gj equals 1,000,000,000 ÷ 3,600 wh = 277777.77777777775191 wh.
Let d(gj) be the numeric amount in Gigajoule (gj), and d(wh) the amount in Watt Hour (wh). Then:
d(wh) = d(gj) × (1,000,000,000 / 3,600)
Equivalently, divide by how many gj fit into one wh (joules per wh divided by joules per gj):
d(wh) = d(gj) ÷ 0.0000036
Or: watt hour = gigajoule ÷ 0.0000036
Examples
Example #1: Convert 1 gj to watt hour
1 gj = 1 gj × (1,000,000,000/3,600) wh = 277777.777778 wh
1 gj = 1 gj ÷ 0.0000036 = 277777.777778 wh
Example #2: Convert 10 gj to watt hour
10 gj = 10 gj × (1,000,000,000/3,600) wh = 2777777.7777800001 wh
10 gj = 10 gj ÷ 0.0000036 = 2777777.7777800001 wh
Summary
To convert Gigajoule to Watt Hour, multiply the value in gj by the ratio of joules per gj divided by joules per wh. Equivalently: value_wh = value_gj × (1000000000 / 3600). Numerically, 1 gj equals 277777.77777777775 wh.
Relationship context
You are converting between SI energy (joules) (Gigajoules) and electrical energy (watt-hours) (Watt Hours). All values are mapped through joules first. The numeric factor is 2.777778e+5.
Conversion tables
| Gigajoule (gj) | Watt Hour (wh) |
|---|---|
| 0.1 | 27,777.7777778 |
| 1 | 277,777.777778 |
| 2 | 555,555.555556 |
| 3 | 833,333.333333 |
| 4 | 1,111,111.1111099999 |
| 5 | 1,388,888.8888900001 |
| 6 | 1,666,666.6666699999 |
| 7 | 1,944,444.44444 |
| 8 | 2,222,222.2222199999 |
| 9 | 2,500,000 |
| Gigajoule (gj) | Watt Hour (wh) |
|---|---|
| 10 | 2,777,777.7777800001 |
| 20 | 5,555,555.5555600002 |
| 30 | 8,333,333.3333299998 |
| 40 | 11,111,111.1110999994 |
| 50 | 13,888,888.8889000006 |
| 60 | 16,666,666.6666999999 |
| 70 | 19,444,444.4444000013 |
| 80 | 22,222,222.2221999988 |
| 90 | 25,000,000 |
| 100 | 27,777,777.7778000012 |