Convert Picojoules to Megatons of TNT
Convert Picojoules (pJ) to Megatons of TNT (Mt(TNT)) instantly and accurately.
Conversion Formula
Mt(TNT) = pJ × 2.390057361e-28
About Picojoules
A picojoule (pJ) is 10⁻¹² J - the scale of laser pulses in scientific instruments and chip-level capacitor storage. A 1 pF capacitor charged to 1 V stores exactly 0.5 pJ. Laser pulse energies in OCT and ultrafast spectroscopy are typically 1-1,000 pJ. Single-photon SNSPD detector dead-time dissipates 1-100 pJ per event. Phase-change memory cells (PCM, ReRAM) switch at 10-100 pJ per state transition, setting a lower bound on non-volatile memory energy efficiency. 1 pJ = 10⁻¹² J = 6.242 MeV.
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
| Picojoules (pJ) | Megatons of TNT (Mt(TNT)) |
|---|---|
| 1 pJ | 2.39 × 10-28 Mt(TNT) |
| 2 pJ | 4.78 × 10-28 Mt(TNT) |
| 5 pJ | 1.195 × 10-27 Mt(TNT) |
| 10 pJ | 2.39 × 10-27 Mt(TNT) |
| 25 pJ | 5.975 × 10-27 Mt(TNT) |
| 50 pJ | 1.195 × 10-26 Mt(TNT) |
| 100 pJ | 2.39 × 10-26 Mt(TNT) |