Convert Nanojoules to Megatons of TNT
Convert Nanojoules (nJ) to Megatons of TNT (Mt(TNT)) instantly and accurately.
Conversion Formula
Mt(TNT) = nJ × 2.390057361e-25
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.
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.
Quick Reference Table
| Nanojoules (nJ) | Megatons of TNT (Mt(TNT)) |
|---|---|
| 1 nJ | 2.39 × 10-25 Mt(TNT) |
| 2 nJ | 4.78 × 10-25 Mt(TNT) |
| 5 nJ | 1.195 × 10-24 Mt(TNT) |
| 10 nJ | 2.39 × 10-24 Mt(TNT) |
| 25 nJ | 5.975 × 10-24 Mt(TNT) |
| 50 nJ | 1.195 × 10-23 Mt(TNT) |
| 100 nJ | 2.39 × 10-23 Mt(TNT) |