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 Refractive Index of Air Calculator 
 Based on Ciddor 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 Ciddor Equation

InputAmount
Vacuum Wavelength:
Air Temperature:
Atmospheric Pressure:
Air Humidity:
Carbon Dioxide Content:
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Engineering Metrology
Precision Engineering Division
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Date Created: Thursday, December 07, 2000
Last Updated: Wednesday, November 24, 2004