Guides

Woodworking and Carpentry Maths Guides

Learn the measurements, formulas, and planning checks behind common lumber/timber, panel, stair, rafter, deck, and miter calculations.

How to Calculate Board Feet

Learn the board foot formula and how to use it when buying rough lumber or timber.

Understand the difference between volume pricing and length pricing for wood projects.

Learn why a 2x4 is not usually 2 inches by 4 inches and how to plan with actual sizes.

Estimate plywood, MDF, OSB, and panel quantities without under-buying.

Learn how to calculate deck boards using deck dimensions, board coverage, spacing, waste allowance, and common layout planning tips.

Learn the basic rise, run, and tread count ideas behind stair stringer layout.

Estimate basic rafter length using rise, run, pitch, and roof geometry.

Understand common miter angle calculations for frames, trim, and polygon projects.