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Unit Converter

 

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1. Select a Property from the drop-down list.
   (Options include: Acceleration, Area, Electricity, Energy, Force, Length, Light, Mass, Density, Pressure, Power, Temperature, Time, Torque, Velocity, Viscosity, Volume, etc.)
   
2. Select the Units to convert to/from in the A and B lists.

Property: _____________________________

A ------- Select a Property ------- B ------- Select a Property -------

 

Quick Reference to Constants

Physics

Speed of light: c = 2.997925E8 m/s
Electron charge: e = 1.6021E-19 Cb
Electron mass: m = 9.11E-31 kgr
Faraday's constant: F = 9.6487E4 Cb/mol
Plank's constant: h = 6.6256E-34 J sec
Rydberg constant: R = 1.097373E7 1/m
Bohr radius: ao = 5.29167E-11 m
Gravitational constant: G = 6.67E15 n m^2 / kg^2
Permitivity of free space: eo = 8.85E-12 Cb^2/ Nm^2
Permeability of free space: mu o = 4*piE-7 N/A^2

 

Chemistry & Thermodynamics

Avogadro's constant: Na = 6.02252E23 1/mol
Boltzman's constant: k = 1.380622E-23 J/'K
Universal gas constant: R = 8.3143 J / 'Kmol

 

Earth Science

Mean distance of Earth to Sun: 1.5E14 m
Mass of the Sun: 1.99E30 kgr
Mass of the Earth: 5.97E24 kgr

 

Standard Atmosphere at Sea Level

Density rho = 1.225 kgr/m^3
Temperature = 288.2 'K
Pressure = 101300 Pa
Viscosity = 1.79E5 Nsec / m^2

 

Ideal Gas Properties

Air

Molecular mass: 28.967
Gas constant: 287 J/ kgr'K
cp = 1004 J/ kg'K (at 25'C)
gamma = 1.4 (at 25'C)

 

Water Vapor

Molecular mass: M = 18.015
Gas constant: R = 461.5 J/kgrK
cp = 1866 J/kgrK (at 25 'C)
gamma = 1.33 (at 25 'C)
Triple point: 273.16 'K