Convert Millijoules to Tons of TNT
Convert Millijoules (mJ) to Tons of TNT (t(TNT)) instantly and accurately.
Conversion Formula
t(TNT) = mJ × 2.390057361e-13
About Millijoules
A millijoule (mJ) is 10⁻³ J - the scale of surgical lasers, spark ignition, and the kinetic energy of small everyday objects. Nd:YAG lasers for ophthalmology and tattoo removal deliver 10-200 mJ per pulse. The minimum spark energy to ignite methane-air is ~0.29 mJ; an automotive spark plug discharges 30-60 mJ per cycle. A 2 g mosquito flying at 1 m/s has kinetic energy ½ × 0.002 × 1² = 1 mJ. Electrocautery monopolar pulses deliver 50-500 mJ to coagulate blood vessels. 1 mJ = 10⁻³ J = 0.2390 cal.
About Tons of TNT
A ton of TNT is an energy unit defined as exactly 10⁹ thermochemical calories = 4.184 GJ. The Trinity test (first nuclear weapon, 1945) yielded ~21 kilotons TNT = 87.9 TJ. The Tsar Bomba yielded ~50 megatons TNT = 209 PJ - the largest human-made explosion in history. Hiroshima's Little Boy yielded ~15 kilotons = 62.8 TJ. The Tunguska 1908 airburst released ~10-15 megatons TNT. Earthquake magnitude 6.0 releases ~63 kilotons TNT equivalent in seismic energy. 1 t(TNT) = 4.184 GJ = 4,184 MJ = 1,162.8 kWh.
Quick Reference Table
| Millijoules (mJ) | Tons of TNT (t(TNT)) |
|---|---|
| 1 mJ | 2.39 × 10-13 t(TNT) |
| 2 mJ | 4.78 × 10-13 t(TNT) |
| 5 mJ | 1.195 × 10-12 t(TNT) |
| 10 mJ | 2.39 × 10-12 t(TNT) |
| 25 mJ | 5.975 × 10-12 t(TNT) |
| 50 mJ | 1.195 × 10-11 t(TNT) |
| 100 mJ | 2.39 × 10-11 t(TNT) |