Convert Foot-Pound-Force to Nanojoules
Convert Foot-Pound-Force (ft·lbf) to Nanojoules (nJ) instantly and accurately.
Conversion Formula
nJ = ft·lbf × 1355817948
About Foot-Pound-Force
A foot-pound-force (ft·lbf) is the work done by one pound-force through one foot - exactly 1.3558179483314004 J. It is the standard torque and energy unit in US engineering. Automotive engine torque: Honda Civic ~125 lb-ft; Ford F-150 EcoBoost ~500 lb-ft. Muzzle energies: .22 LR ~140 ft·lbf; .308 Winchester ~2,600 ft·lbf; .50 BMG ~14,000 ft·lbf. Diesel pile hammers deliver 15,000-600,000 ft·lbf/blow. SAE Grade 8 bolts are specified at 7-950 ft·lbf. 1 ft·lbf = 12 in·lbf = 1.35582 J = 0.32405 cal.
About Nanojoules
A nanojoule (nJ) is 10⁻⁹ J - the scale of ultrashort laser pulses, flash memory write operations, and cellular ATP reserves. A Ti:sapphire laser oscillator produces pulses of 1-20 nJ at 80 MHz. Flash NAND programming costs ~1-10 nJ/bit written; a read is ~0.1 nJ/bit. The total ATP energy stored in a single red blood cell is ~1-5 nJ. The kinetic energy of a 1 µg particle at 1.4 m/s is ~1 nJ, illustrating that nanojoules describe real nanoscale mechanical events. 1 nJ = 10⁻⁹ J.
Quick Reference Table
| Foot-Pound-Force (ft·lbf) | Nanojoules (nJ) |
|---|---|
| 1 ft·lbf | 1.356 × 109 nJ |
| 2 ft·lbf | 2.712 × 109 nJ |
| 5 ft·lbf | 6.779 × 109 nJ |
| 10 ft·lbf | 1.356 × 1010 nJ |
| 25 ft·lbf | 3.39 × 1010 nJ |
| 50 ft·lbf | 6.779 × 1010 nJ |
| 100 ft·lbf | 1.356 × 1011 nJ |