Use this workshop calculation to turn measured dimensions and the selected construction convention into a cut, spacing, fit, or material-planning value.

Measured moisture (%)

Meter reading in percent, between zero and one hundred.

Species correction (%)

Species-specific correction offset in percent, between minus five and five.

Correct a resistance moisture meter reading by a wood species correction offset. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Corrected moisture (%)

Corrected wood moisture content in percent.

• Nominal dimensions, kerf, moisture movement, hardware clearances, wall squareness, and manufacturer instructions can change the required shop dimension. Measure the actual assembly and test critical joints on scrap before cutting finished material.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Complement the calculated dimension with a physical story stick, dry fit, or full-size layout. Follow the hardware, coating, adhesive, or machine manufacturer's limits where they differ from a rule of thumb.

• Capacitive Meter Correction

  Correct a capacitive moisture meter reading by a wood species correction percent.

• Holz Quellung

  Expected across-grain wood swelling over a rising dry-basis moisture content, using a species- and direction-specific measured movement coefficient.

• Holz Schwindmass

  Expected across-grain wood shrinkage over a falling dry-basis moisture content, using a species- and direction-specific measured movement coefficient.