Convert Femtojoules to Tons of TNT
Convert Femtojoules (fJ) to Tons of TNT (t(TNT)) instantly and accurately.
Conversion Formula
t(TNT) = fJ × 2.390057361e-25
About Femtojoules
A femtojoule (fJ) is 10⁻¹⁵ J - the scale of gamma-ray photons, molecular motor work, and state-of-the-art digital logic. The electron rest-mass energy is 81.87 fJ; a 100 keV X-ray photon carries 16.02 fJ. A single myosin II motor protein power stroke dissipates ~5-40 fJ. ATP hydrolysis under cellular conditions yields ~80-100 fJ of free energy. Advanced 3 nm CMOS gates switch at ~0.1-1 fJ per operation. Ultrafast fiber laser oscillators produce pulses of 0.1-10 fJ before amplification. 1 fJ = 10⁻¹⁵ J = 6.242 keV.
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
| Femtojoules (fJ) | Tons of TNT (t(TNT)) |
|---|---|
| 1 fJ | 2.39 × 10-25 t(TNT) |
| 2 fJ | 4.78 × 10-25 t(TNT) |
| 5 fJ | 1.195 × 10-24 t(TNT) |
| 10 fJ | 2.39 × 10-24 t(TNT) |
| 25 fJ | 5.975 × 10-24 t(TNT) |
| 50 fJ | 1.195 × 10-23 t(TNT) |
| 100 fJ | 2.39 × 10-23 t(TNT) |