Framing Calculators
Wall framing, header sizing, and structural material calculators.
Framing calculations combine piece counts, spans, and spacing rules from the American Wood Council. Use these tools to estimate studs, plates, and headers for wall framing or to calculate stair stringer cuts, riser height, and tread count from total rise and run.
Wall Framing Calculator
FramingCalculate studs, plates, and headers needed to frame any wall. Works for 2×4 and 2×6 construction.
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Stair Stringer Calculator
FramingCalculate riser height, tread count, stringer length, and lumber needed for any staircase.
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Roof Rafter Calculator
FramingCalculate rafter length, board count, and lumber needed for a gable roof based on span and pitch.
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Floor Joist Span Calculator
FramingFind the maximum allowable floor joist span for common lumber sizes and species based on AWC span tables.
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Window & Door Header Calculator
FramingDetermine the correct header size for window and door openings based on span and load above.
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Subfloor Calculator
FramingCalculate OSB or plywood subfloor panels, adhesive, and screws needed for any floor area.
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