Wood Movement Predictor

Our wood movement calculator predicts how much lumber will expand or contract as moisture content changes with seasonal humidity variations. Understanding wood movement is essential for furniture makers, cabinet builders, and woodworkers who want their projects to last without cracking, warping, or joint failure.

Wood moves primarily across the grain (tangentially and radially) but very little along the grain. Different species move at different rates - oak and maple are notorious for significant seasonal movement, while pine is more stable. This calculator uses published tangential shrinkage coefficients to predict movement accurately.

This tool helps woodworkers design joinery that accommodates wood movement, such as breadboard ends, floating panels, and slotted screw holes. If you're asking "how much will my tabletop expand?" or "do I need to allow for wood movement?", this calculator provides the answer based on your specific wood species and moisture conditions.