Stair and roof limits follow the 2021 IRC. Check your local code.
Construction charts and guides
Free charts for the job site, one US Letter page each, with answers to the questions people ask most.
Seven charts to print
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Fraction to decimal chart: inches, millimeters and feetEvery 64th of an inch as a decimal, in millimeters and in decimal feet. -
Roof pitch chart: degrees, slope and rafter lengthEvery pitch from 1/12 to 24/12: angle, slope and rafter length. -
Stair rise and run code: 7-3/4" risers, 10" treadsRisers, treads and run for stairs from 2' to 10', at code limits and the 7-11 rule. -
How to calculate board feetBoard feet for 1x4 to 6x6 lumber from 8' to 16' long, plus hardwood in quarters. -
How many bags of concrete in a yard?Bags of 80, 60 or 40 lb concrete per yard, and for slabs from 8' × 8' to 24' × 24'. -
How to calculate square footage from inches and fractionsSquare feet from feet, inches and fractions, for rooms, tile, sheets and doors. -
Crown molding angles chart: miter and bevel settingsMiter and bevel settings for 52/38 and 45/45 crown, for corners from 60° to 150°.
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