Convert Attojoules to Megatons of TNT
Convert Attojoules (aJ) to Megatons of TNT (Mt(TNT)) instantly and accurately.
Conversion Formula
Mt(TNT) = aJ × 2.390057361e-34
About Attojoules
An attojoule (aJ) is 10⁻¹⁸ J - the scale of individual X-ray photons and superconducting qubit circuits. A 1 keV X-ray photon carries 160 aJ; a visible green photon (~550 nm) carries ~0.36 aJ. Josephson junction energies in superconducting qubits are set in tens to hundreds of aJ to achieve quantum coherence at millikelvin temperatures. XRISM's cryogenic TES X-ray spectrometer resolves individual photon energies at the hundreds-of-aJ level with ~7 eV FWHM resolution. 1 aJ = 10⁻¹⁸ J = 6.242 eV.
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
| Attojoules (aJ) | Megatons of TNT (Mt(TNT)) |
|---|---|
| 1 aJ | 2.39 × 10-34 Mt(TNT) |
| 2 aJ | 4.78 × 10-34 Mt(TNT) |
| 5 aJ | 1.195 × 10-33 Mt(TNT) |
| 10 aJ | 2.39 × 10-33 Mt(TNT) |
| 25 aJ | 5.975 × 10-33 Mt(TNT) |
| 50 aJ | 1.195 × 10-32 Mt(TNT) |
| 100 aJ | 2.39 × 10-32 Mt(TNT) |