1 exajoule(EJ)=278 terawatt-hours（TWH）
| 1 exajoule | = | 278 terawatt-hours |
| Units |
| 1 metric tonne = 2204.62 lb. |
| = 1.1023 short tons |
| 1 kilolitre = 6.2898 barrels |
| 1 kilolitre = 1 cubic metre |
| 1 kilocalorie (kcal) = 4.1868 kJ = 3.968 Btu |
| 1 kilojoule (kJ) = 1,000 joules = 0.239 kcal = 0.948 Btu |
| 1 petajoule (PJ) = 1 quadrillion joules (1 x 1015) |
| 1 exajoule (EJ) = 1 quintillion joules (1 x 1018) |
| 1 British thermal unit (Btu) = 0.252 kcal = 1.055 kJ |
| 1 barrel of oil equivalent (boe) = 5.8 million Btu = 6.119 million kJ |
| 1 kilowatt-hour (kWh) = 860 kcal = 3600 kJ = 3412 Btu |
1A=1000P，1P=1000T，1T=1000G，1G=1000M，1M=1000K，1K=1000。1A=10的18次方，即100亿亿。
quintillion 英 [kwɪnˈtɪljən] 美 [kwɪnˈtɪljən] num. 百万的三次方 ,10¹⁸
