Convert Kilojoules to Gigajoules
Convert Kilojoules (kJ) to Gigajoules (GJ) instantly and accurately.
Conversion Formula
GJ = kJ × 1.000000000e-6
About Kilojoules
A kilojoule (kJ) is exactly 1,000 J and is the standard energy unit for food and physical chemistry. EU, Australian, and NZ food labels are mandatory in kJ: recommended adult intake is ~8,400 kJ/day. Bond dissociation energies: C-H bond 413 kJ/mol; C=C double bond 614 kJ/mol; N≡N triple bond 945 kJ/mol. Specific heat of water: 4.184 kJ/(kg·K). A cyclist riding at 150 W for one hour expends 540 kJ. Charpy and Izod impact toughness tests record results in J and kJ. 1 kJ = 1,000 J = 239.0 cal = 0.94782 BTU = 0.27778 Wh.
About Gigajoules
A gigajoule (GJ) is 10⁹ J - the scale of fossil-fuel commodity volumes. One barrel of crude oil contains ~5.80 GJ; one metric tonne of hard coal ~29.3 GJ. Canadian energy bills express household consumption in GJ: average Canadian households use ~100-130 GJ/year. A 1 GW power plant at 33% efficiency burns ~10.9 GJ/h of fuel to generate 1 GWh = 3.6 GJ of electricity. Detonation of 1 tonne of TNT releases 4.184 GJ. 1 GJ = 10⁹ J = 277.78 kWh = 947,817 BTU = 9.4782 therms.
Quick Reference Table
| Kilojoules (kJ) | Gigajoules (GJ) |
|---|---|
| 1 kJ | 1 × 10-6 GJ |
| 2 kJ | 2 × 10-6 GJ |
| 5 kJ | 5 × 10-6 GJ |
| 10 kJ | 1 × 10-5 GJ |
| 25 kJ | 2.5 × 10-5 GJ |
| 50 kJ | 5 × 10-5 GJ |
| 100 kJ | 1 × 10-4 GJ |