Convert Megatons of TNT to Exajoules
Convert Megatons of TNT (Mt(TNT)) to Exajoules (EJ) instantly and accurately.
Conversion Formula
EJ = Mt(TNT) × 0.004184
About Megatons of TNT
A megaton of TNT (Mt(TNT)) = 10⁶ tons of TNT = exactly 4.184 PJ. The Soviet Tsar Bomba (1961) yielded ~50 Mt - the largest human-made explosion ever, with a fireball 8 km in diameter. Castle Bravo (1954) yielded ~15 Mt, 2.5× its 6 Mt design yield. Modern thermonuclear warheads typically range from 0.1-1.2 Mt. The 2011 Tōhoku earthquake released ~500 Mt in seismic energy. The Krakatoa 1883 eruption released ~200 Mt; Tambora 1815 ~33,000 Mt. 1 Mt(TNT) = 4.184 PJ = 1,162,800 MWh.
About Exajoules
An exajoule (EJ) is 10¹⁸ J - the scale of global energy consumption. World primary energy supply in 2022 was ~580-610 EJ: coal ~160 EJ; oil ~190 EJ; gas ~145 EJ; nuclear ~26 EJ; wind ~8 EJ; solar PV ~8 EJ. Global electricity generation of ~29,000 TWh = 104 EJ. Solar energy incident on Earth's atmosphere is ~5.5 × 10⁶ EJ/year - approximately 9,000× total human demand. Annual fossil fuel combustion releases ~490 EJ/year, producing ~36.8 Gt CO₂. 1 EJ = 10¹⁸ J = 277.78 TWh = 238.85 Mtoe.
Quick Reference Table
| Megatons of TNT (Mt(TNT)) | Exajoules (EJ) |
|---|---|
| 1 Mt(TNT) | 0.004184 EJ |
| 2 Mt(TNT) | 0.008368 EJ |
| 5 Mt(TNT) | 0.02092 EJ |
| 10 Mt(TNT) | 0.04184 EJ |
| 25 Mt(TNT) | 0.1046 EJ |
| 50 Mt(TNT) | 0.2092 EJ |
| 100 Mt(TNT) | 0.4184 EJ |