Convert Inch-Pound-Force to Tons of TNT
Convert Inch-Pound-Force (in·lbf) to Tons of TNT (t(TNT)) instantly and accurately.
Conversion Formula
t(TNT) = in·lbf × 2.700402223e-11
About Inch-Pound-Force
An inch-pound-force (in·lbf) is the work done by one pound-force through one inch - exactly 0.11298482902761670 J (= 1/12 ft·lbf). It is the dominant torque unit for small fasteners and precision instruments in the US: a #6-32 screw in aluminium is torqued to 4-6 in·lbf; a dental implant abutment screw to ~25-30 Ncm (2.2-2.7 in·lbf). Hobby servo motor torque is quoted in oz·in (1 in·lbf = 16 oz·in). Bicycle stem bolts are typically 4-6 Nm (35-53 in·lbf). 1 in·lbf = 0.11298 J = 1/12 ft·lbf = 11.298 Ncm.
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
| Inch-Pound-Force (in·lbf) | Tons of TNT (t(TNT)) |
|---|---|
| 1 in·lbf | 2.7 × 10-11 t(TNT) |
| 2 in·lbf | 5.401 × 10-11 t(TNT) |
| 5 in·lbf | 1.35 × 10-10 t(TNT) |
| 10 in·lbf | 2.7 × 10-10 t(TNT) |
| 25 in·lbf | 6.751 × 10-10 t(TNT) |
| 50 in·lbf | 1.35 × 10-9 t(TNT) |
| 100 in·lbf | 2.7 × 10-9 t(TNT) |