GJ
gigajoule
Energyexact by definition
The gigajoule is 10⁹ joules, exact by prefix. It is the billing unit for natural gas in Canada and much of Europe: one GJ is about 948,000 BTU, and a typical house burns 80 to 120 GJ a year on heating.
| 1 GJ | 1,000,000,000 J |
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