Wood Moisture Content Calculator

Calculate the equilibrium moisture content (EMC) of wood based on ambient temperature and relative humidity. Uses the Hailwood-Horrobin model.

Inputs

Temperature

°F

Relative Humidity

Tab to move between fields

Results

Equilibrium MC

25.5%

Ideal for Interior Use0

Furniture Target MC7%

Interior Min MC6%

Interior Max MC8%

How to Use This Calculator

Enter Temperature and Relative Humidity.
Review the Equilibrium MC (%) result.
Use Ideal for Interior Use and Furniture Target MC (%) to inform your decision.
Use the chart to visualize the results and explore different scenarios by adjusting inputs.

How the result changes with Relative Humidity

Relative Humidity	Equilibrium MC
14	4.8%
37	16.5%
64	38.8%
86	77.9%

What each input means

Temperature: Ambient air temperature in degrees Fahrenheit
Relative Humidity: Relative humidity percentage of the environment

How this is calculated

Worked example, using the default values

Identify Input Parameters
Temperature = 70, Relative Humidity = 50 = 2 input(s) provided
Calculate Equilibrium MC
Equilibrium MC
25.5 = 25.5
Calculate Ideal for Interior Use
Ideal for Interior Use
0 = 0
Calculate Furniture Target MC
Furniture Target MC
7 = 7

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