Carpentry & Woodworking Calculators
Board foot, plywood sheets, stair stringers, joist spans, roof pitch, and more. Every result is code-referenced and ready for your next project.
Tools built for the jobsite
From quick board-foot estimates to IRC-referenced stair stringer layout. Free to use, no account required to view.
Board Foot Calculator
Calculate board feet for lumber purchases and project material estimates.
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Linear Footage Calculator
Calculate total linear feet of lumber or material including waste allowance.
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Plywood Sheet Estimator
Estimate how many plywood or OSB sheets you need for floors, walls, or roofing.
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Deck Board Calculator
Calculate the number of deck boards needed for a deck surface.
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Stair Stringer Calculator
Calculate stair riser height, tread depth, and stringer length per IRC code.
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Joist Span Lookup
Look up maximum floor joist span from IRC Table R502.3.1 (Douglas Fir-Larch, 40 psf).
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Roof Pitch Calculator
Calculate roof pitch, angle, pitch factor, and rafter length per foot of run.
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Ready to simplify your carpentry business?
Bit & Grain connects your tools to job costing, estimates, and scheduling in one place. Free to start.