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Wood Movement Calculator

Predict how much a panel will swell and shrink across the seasons so your joints never crack.

Your panel

Grain orientation
Heated home in winter ≈ 6%
Humid summer ≈ 10–12%
Climate presets:

How other species compare at this width

The method

Movement = width × dimensional change coefficient × change in moisture content. Coefficients are the USDA Wood Handbook averages per 1% moisture change; real boards vary, so treat results as a planning estimate and leave a little extra room.

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