Convert Microjoules to Megatons of TNT
Convert Microjoules (µJ) to Megatons of TNT (Mt(TNT)) instantly and accurately.
Conversion Formula
Mt(TNT) = µJ × 2.390057361e-22
About Microjoules
A microjoule (µJ) is 10⁻⁶ J - the scale of precision laser ablation, ESD damage events, and individual LIDAR pulses. LASIK eye surgery delivers 0.5-2 µJ per pulse at 193 nm, ablating ~0.25 µm of corneal tissue per pulse. ESD events that destroy IC gates correspond to 1-1,000 µJ; the Human Body Model test discharges ~500 µJ at 2 kV. Q-switched microchip laser pulses for rangefinding are 1-100 µJ. The kinetic energy of a 1 mg grain of sand falling 10 cm is mgh ≈ 0.98 µJ. 1 µJ = 10⁻⁶ 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
| Microjoules (µJ) | Megatons of TNT (Mt(TNT)) |
|---|---|
| 1 µJ | 2.39 × 10-22 Mt(TNT) |
| 2 µJ | 4.78 × 10-22 Mt(TNT) |
| 5 µJ | 1.195 × 10-21 Mt(TNT) |
| 10 µJ | 2.39 × 10-21 Mt(TNT) |
| 25 µJ | 5.975 × 10-21 Mt(TNT) |
| 50 µJ | 1.195 × 10-20 Mt(TNT) |
| 100 µJ | 2.39 × 10-20 Mt(TNT) |