21 Kilojoules to Gigajoules
Convert 21 kilojoules (kJ) to gigajoules (GJ) with formulas, examples, and conversion tables.
kJ
GJ
21 kJ = 2.1e-5 GJ
Full precision:0.000021 GJ
Step-by-Step Solution
To convert 21 kilojoules to gigajoules, we divide by 1000000 because one gigajoule equals exactly 1000000 kilojoules.
1 gigajoule = 1000000 kilojoules
Since there are 1000000 kilojoules in every gigajoule, we divide our value by this factor:
21 ÷ 1000000 = 2.1e-5 gigajoules
So 21 kilojoules = 2.1e-5 gigajoules.
Quick check: 2.1e-5 × 1000000 = 21 kilojoules
Kilojoules to Gigajoules Conversion Table
| Kilojoules | Gigajoules |
|---|---|
| 1 kJ | 1e-6 GJ |
| 2 kJ | 2e-6 GJ |
| 3 kJ | 3e-6 GJ |
| 4 kJ | 4e-6 GJ |
| 5 kJ | 5e-6 GJ |
| 10 kJ | 1e-5 GJ |
| 20 kJ | 2e-5 GJ |
| 21 kJ | 2.1e-5 GJ |
| 50 kJ | 5e-5 GJ |
| 100 kJ | 0.0001 GJ |
21 Kilojoules in Other Units
| Unit | 21 kJ = |
|---|---|
| Kilojoules to Joules | 21000 J |
| Kilojoules to Megajoules | 0.021 MJ |
| Kilojoules to Gigajoules | 0.000021 GJ |
| Kilojoules to Watt-hours | 5.8333 Wh |
| Kilojoules to Kilowatt-hours | 0.0058333 kWh |
| Kilojoules to Megawatt-hours | 0.00000583 MWh |
| Kilojoules to Calories | 5019.12 cal |
| Kilojoules to Kilocalories | 5.0191 kcal |
| Kilojoules to BTU | 19.9041 BTU |
| Kilojoules to Therms | 0.00019904 therm |
| Kilojoules to Foot-pounds | 15488.78 ft·lb |
| Kilojoules to Electronvolts | 1.3107e+23 eV |
| Kilojoules to Ergs | 2.1e+11 erg |