Master Unit Converter
This converter requires the use of Javascript enabled and capable browsers. You may convert between any of the displayable Designation Category values in the drop down box. Enter a valid numeric value in the Conversion Quantity field (initially defaults to 1 and resets to 1) and then click on and select the Convert From field designation, then select a value, and select the Convert To field designation, and select a value. Click on the Convert Units button to actually convert the values. The calculated values will appear in the Converted Value field. To do another, click the Clear Values button and then enter a new value. (The last-used designations will remain but the Converted Value will be cleared and the Convert Quantity will be reset to 1.) Calculated accuracy of most current Javascript enabled browsers is generally 16 places. See the Constants information below the converter table.
For printable reference, you may want to try:
Conversion Factors Table
Unit Conversion Table
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Constants for further reference
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
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