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 Refractive Index of Air Calculator 
 Based on Modified Edlén Equation 

Refractive Index of Air Calculator is a web-based tool for calculating the index of refraction of air and wavelength of light in air as a function of various input parameters, using the Ciddor Equation or a modified version of the Edlén Equation.

Index of Refraction of Air
Jack A. Stone and Jay H. Zimmerman

Vacuum Wavelength and Ambient Conditions
Based on Modified Edlén Equation

InputAmount
Vacuum Wavelength:
Air Temperature:
Atmospheric Pressure:
Air Humidity:
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Engineering Metrology
Precision Engineering Division
Manufacturing Engineering Laboratory
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Date Created: Wednesday, November 22, 2000
Last Updated: Wednesday, November 24, 2004