Convert Megatons of TNT to Kilojoules
Convert Megatons of TNT (Mt(TNT)) to Kilojoules (kJ) instantly and accurately.
Conversion Formula
kJ = Mt(TNT) × 4184000000000
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 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.
Quick Reference Table
| Megatons of TNT (Mt(TNT)) | Kilojoules (kJ) |
|---|---|
| 1 Mt(TNT) | 4.184 × 1012 kJ |
| 2 Mt(TNT) | 8.368 × 1012 kJ |
| 5 Mt(TNT) | 2.092 × 1013 kJ |
| 10 Mt(TNT) | 4.184 × 1013 kJ |
| 25 Mt(TNT) | 1.046 × 1014 kJ |
| 50 Mt(TNT) | 2.092 × 1014 kJ |
| 100 Mt(TNT) | 4.184 × 1014 kJ |