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Construction Calculators

Framing Calculator

Calculate the number of studs needed to frame a wall from its length, on-center spacing and number of door/window openings.

ft
Each opening typically needs about 3 extra studs for king, jack/trimmer and cripple studs.
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Field studs (on-center) —
Total studs needed —
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About the Framing Calculator

This calculator estimates how many studs you need to frame a wall, starting from the regularly-spaced "field" studs along its length, then adding extra studs for each door or window rough opening.

Formula: Field Studs = (Wall Length ÷ Spacing in Feet) + 1; Total Studs = (Field Studs + Openings × Extra Studs per Opening) × (1 + Waste %)

16in o.c. is standard for most residential walls; 24in o.c. is common for non-load-bearing interior partitions with advanced framing. Add extra studs for corners, T-intersections and blocking that this simplified count doesn't capture.

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