Complex Dielectric Constant of Water

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Calculates the complex dielectric constant of water for a given frequency and temperature using the model derived by Thomas Meissner and Frank Wentz in "The Complex Dielectric Constant of Pure and Sea Water from Microwave Satellite Observations". Their paper can be found here

For pure water the model is valid for frequencies up to 500 GHz from a temperature of -20 °C (note that this is super cooled water NOT ice) to +40 °C.

Graph of Real and Imaginary Dielectric Constant of Water against Frequency

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Enter values and press Enter or click on the Calculate button


Temperature °C       Static εr
Frequency GHz       Real εr
         Imaginary εr
   Loss Tangent

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Note that neither Thomas Meissner or Frank Wentz are in any way related to, or affiliated with, this site.

Related links


Chemical Composition of the Oceans



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This page was last changed on: 27 May 2012.

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