This list of mechanical constants represent the most common values used in engineering, physics, and chemistry.
If you know of others that should be added, please send me an
e-mail.
Visit
NIST for all constants, units, and uncertainties.
This is their
Extensive Listing of constants.
| Name | Symbol | Value |
| Horsepower | HP | 745.7 W |
| Atmosphere | Atm | 14.70 lb/in2 |
| Pi | P | 3.141 592 653 589 793 238 46 |
| Natural log base | e | 2.718 281 828 459 045 235 36 |
| Square root of 2 | √2 | 1.414 213 562 372 095 048 80 |
| Euler's constant | g | 0.577 215 664 901 532 860 61 |
| Golden Ratio | f | 1.618 033 988 749 894 848 20 |
| 1º of latitude at 40º latitude | | 69 mi |
| Acceleration of gravity | g | 32.1726 ft/s2 |
| Knot | kt | 1.1508 mi/hr |
| Speed of sound @ 0ºC | | 1087.1 ft/s |
| Water heat of fusion @ 0ºC | ∆Hfus | 79.71 cal/g |
| Water heat of vaporization @ 0ºC | ∆Hvap | 539.55 cal/g |
| Acre | | 43 560 ft2 |