Poundal
The poundal is a non-SI unit of force. It is a part of the absolute foot-pound-second system of units, a coherent subsystem of English units introduced in 1879, and one of several specialized subsystems of mechanical units used as aids in calculations. It is defined as 1 lb·ft/s².
1 pdl = 0.138 254 954 376 N exactly
| Newton | Dyne | Kilopond | Pound-force | Poundal | |
|---|---|---|---|---|---|
| 1 N | := 1 kg·m/s² | = 105 dyn | ~= 0.10197 kp | ~= 0.22481 lbf | ~= 7.2330 pdl |
| 1 dyn | = 10−5 N | := 1 g·cm/s² | ~= 1.0197×10−6 kp | ~= 2.2481×10−6 lbf | ~= 7.2330×10−5 pdl |
| 1 kp | = 9.80665 N | = 980665 dyn | := gn·(1 kg) | ~= 2.2046 lbf | ~= 70.932 pdl |
| 1 lbf | = 4.4482216152605 N | ~= 444822 dyn | ~= 0.45359 kp | := gn·(1 lb) | ~= 32.174 pdl |
| 1 pdl | = 0.138254954376 N | ~= 13825 dyn | ~= 0.014098 kp | ~= 0.031081 lbf | := 1 lb·ft/s² |
| The values for the pound-force are calculated using the same value for the standard acceleration of gravity gn which is official for defining the kilopond (a.k.a. kilogram-force), something which is not required. Other values such as gn = 32.16 ft/s² are also used. | |||||