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USCS and SI Units

Below are a unit conversions to convert between different units in the USCS and SI Unit systems

 

Fundamental Constants

Below are a list of Fundamental Scientific Constants including the quantity, symbol and value with units

Quantity Symbol Value
electron charge e 1.602176634 × 10-19 C
Faraday constant F 96485.33212 C/mol
Universal gas constant R 8.314462618 J/mol K
gravitation-Newtonian constant G 6.67430 × 10-11 Nm2/kg2
gravitational acceleration (standard) g 9.80665 m/s2
speed of light c 299792458 m/s
Planks constant h 6.6260715 x 10-34 J/Hz
Boltzmann constant k 1.380649 × 10-23 J/K
Avogadro’s Number Na 6.03 × 1023

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Manufacturing for Mechanical Engineers Copyright © 2026 by Peter Kazarinoff is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License, except where otherwise noted.