Convert Joules to Tons of TNT
Convert Joules (J) to Tons of TNT (t(TNT)) instantly and accurately.
Conversion Formula
t(TNT) = J × 2.390057361e-10
About Joules
The joule (J) is the SI unit of energy, defined as one newton acting through one metre (1 J = 1 N·m = 1 kg·m²/s²). Named after James Prescott Joule, whose 1840s paddle-wheel experiments established the mechanical equivalent of heat (~4.15 J = 1 calorie). One joule is modest: it lifts a 100 g apple by 1 m, heats 0.239 mL of water by 1°C, or powers a 1 W LED for 1 second. Daily adult resting metabolism is ~6-9 MJ. 1 J = 1 W·s = 0.23901 cal = 9.4782 × 10⁻⁴ BTU = 2.7778 × 10⁻⁷ kWh.
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
| Joules (J) | Tons of TNT (t(TNT)) |
|---|---|
| 1 J | 2.39 × 10-10 t(TNT) |
| 2 J | 4.78 × 10-10 t(TNT) |
| 5 J | 1.195 × 10-9 t(TNT) |
| 10 J | 2.39 × 10-9 t(TNT) |
| 25 J | 5.975 × 10-9 t(TNT) |
| 50 J | 1.195 × 10-8 t(TNT) |
| 100 J | 2.39 × 10-8 t(TNT) |