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Carpentry & Framing

Carpentry and framing calculators for stairs, rafter spans, board feet, joist spans, and beam sizing

Calculators & Instant Answers

Interactive tools and pre-calculated results for common scenarios

Calculate stair dimensions including rise, run, and stringer length per building codes

Determine allowable rafter spans based on species, grade, spacing, and load conditions

Calculate board feet for lumber pricing and material takeoff

Determine allowable floor joist spans based on lumber specifications and loads

Calculate required header and beam sizes for openings based on span and loads

Look up maximum spans for floor joists, ceiling joists, and rafters from IRC span tables based on species, grade, size, and spacing.