How this calculator works
Divide a straight wall run by the maximum on-centre spacing, round the number of bays up and add an end stud. Waste is applied to the resulting whole count. This is a regular-stud takeoff: corners, wall intersections, kings, jacks, headers, blocking and plates require separate counts. Canadian surfaced dry 2 x 4 lumber is commonly 38 x 89 mm in the cited CWC table.
Formula
Net studs = ceil(length / maximum spacing) + 1; purchased studs = ceil(net studs x (1 + waste)); maximum length = (net studs - 1) x spacing; cost = purchased studs x unit price.
Worked example
A 4 m wall at 400 mm centres needs 10 bays and 11 regular studs. With no waste and a $5 unit price the cost is $55.
Advertisement
Frequently asked questions
Does this choose a structural spacing?
No. Enter the spacing specified for the wall assembly and local requirements. The count does not assess loads or stud capacity.
Why add one stud?
Ten spaces between studs require eleven studs, including both ends of the run.
Does the count include openings?
No. A framing plan must separately allow for the studs, headers and supports around each opening.