Convert Megatons of TNT to Nanojoules
Convert Megatons of TNT (Mt(TNT)) to Nanojoules (nJ) instantly and accurately.
Conversion Formula
nJ = Mt(TNT) × 4.184000000e+24
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 Nanojoules
A nanojoule (nJ) is 10⁻⁹ J - the scale of ultrashort laser pulses, flash memory write operations, and cellular ATP reserves. A Ti:sapphire laser oscillator produces pulses of 1-20 nJ at 80 MHz. Flash NAND programming costs ~1-10 nJ/bit written; a read is ~0.1 nJ/bit. The total ATP energy stored in a single red blood cell is ~1-5 nJ. The kinetic energy of a 1 µg particle at 1.4 m/s is ~1 nJ, illustrating that nanojoules describe real nanoscale mechanical events. 1 nJ = 10⁻⁹ J.
Quick Reference Table
| Megatons of TNT (Mt(TNT)) | Nanojoules (nJ) |
|---|---|
| 1 Mt(TNT) | 4.184 × 1024 nJ |
| 2 Mt(TNT) | 8.368 × 1024 nJ |
| 5 Mt(TNT) | 2.092 × 1025 nJ |
| 10 Mt(TNT) | 4.184 × 1025 nJ |
| 25 Mt(TNT) | 1.046 × 1026 nJ |
| 50 Mt(TNT) | 2.092 × 1026 nJ |
| 100 Mt(TNT) | 4.184 × 1026 nJ |