Wet Basis to Dry Basis Gas Calculator

Wet Basis to Dry Basis Gas Calculator: Remove Moisture Dilution

Gas analyzers measuring raw flue gas report concentrations that include water vapor (wet basis), but emissions regulations are usually written on a dry basis. This calculator converts a wet-basis reading into its dry-basis equivalent.

The Formula

Dry% = Wet% / (1 − Moisture Fraction)

Worked Example

A wet-basis reading shows 10% for a species, with 10% moisture content in the gas stream.

Dry% = 10 / (1 − 0.10) = 11.11%

How to Use This Calculator

1. Enter the wet-basis gas concentration percentage.
2. Enter the moisture fraction of the gas stream (0-1).
3. Click Calculate to get the dry-basis equivalent.

Related Calculations

Use with the Dry Basis to Wet Basis Calculator to convert back in the other direction.