The exajoule (EJ) is equal to 1018 (one quintillion) joules. The 2011 Tōhoku earthquake and tsunami in Japan had 1.41 EJ of energy according to its rating of 9.0 on the moment magnitude scale. Yearly U.S. energy consumption amounts to roughly 94 EJ.
| Definition | Relation to SI units |
|---|---|
= 1018 joule |
| quad | gallon-atmosphere (imperial) | terajoule | foot-poundal | yottajoule | horsepower-hour | gallon-atmosphere (US) | gigajoule |
|---|---|---|---|---|---|---|---|
| 1 | 2.290449966093 × 1015 | 1,055,055.85262 | 2.5036855629267 × 1019 | 1.05505585262 × 10-6 | 393,014,778,922.23 | 2.750715716152 × 1015 | 1,055,055,852.62 |
| 4.3659543530906 × 10-16 | 1 | 4.6063256925 × 10-10 | 10,930.9768822 | 4.6063256925 × 10-22 | 0.0001716 | 1.2009499 | 4.6063256925 × 10-7 |
| 9.4781712031332 × 10-7 | 2,170,927,691.084 | 1 | 23 730 360 404 232 | 1.0 × 10-12 | 372,506.1359986 | 2,607,175,448.8838 | 1 000 |
| 3.9941117798796 × 10-20 | 9.148313190797 × 10-5 | 4.2140110093805 × 10-14 | 1 | 4.2140110093805 × 10-26 | 1.5697449581601 × 10-8 | 0.0001099 | 4.2140110093805 × 10-11 |
| 947,817.1203133 | 2.170927691084 × 1021 | 1 000 000 000 000 | 2.3730360404232 × 1025 | 1 | 3.7250613599864 × 1017 | 2.6071754488838 × 1021 | 1.0 × 1015 |
| 2.5444335776439 × 10-12 | 5,827.8978016 | 2.684519537696 × 10-6 | 63,704,616.141728 | 2.684519537696 × 10-18 | 1 | 6,999.0134307 | 0.0026845 |
| 3.6354174810871 × 10-16 | 0.8326742 | 3.835568490138 × 10-10 | 9,101.9422626 | 3.835568490138 × 10-22 | 0.0001429 | 1 | 3.835568490138 × 10-7 |
| 9.4781712031332 × 10-10 | 2,170,927.691084 | 0.001 | 23,730,360,404.232 | 1.0 × 10-15 | 372.5061360 | 2,607,175.4488838 | 1 |
| Symbol | Definition |
|---|---|
| ≡ | exactly equal |
| ≈ | approximately equal to |
| = | equal to |
| digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |
| 1 exajoules | = 1.0E+18 joules |
| 2 exajoules | = 2.0E+18 joules |
| 3 exajoules | = 3.0E+18 joules |
| 4 exajoules | = 4.0E+18 joules |
| 5 exajoules | = 5.0E+18 joules |