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

Temperature (°C)

Wood temperature in degrees Celsius.

Relative humidity (%)

Relative humidity in percent.

Look up equilibrium moisture content of wood by temperature and relative humidity with bilinear interpolation. 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]

Equilibrium moisture (%)

Equilibrium 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.

• Biscuit Slot Depth Lookup

  Look up the standard joiner plunge depth for size 0, 10, and 20 compressed-wood biscuits.

• Riser Board Thickness Lookup

  Look up the typical riser board thickness for plywood, MDF, and solid wood materials.

• DIN 4556 Desk Height Lookup

  Look up the DIN 4556 standard work height of 680 mm and the adjustment range of height-adjustable desks.