Stud Calculator: measuring notes and method
Measure across the stud positions
Run length is the horizontal distance along the wall; length per piece is the required stud length.
A count is not a framing schedule
Use the framing drawing to count corner assemblies, lintel supports, blocking and any studs removed or added around openings. Keep these identifiable in the takeoff.
Formula
Pieces before waste = round up(run ÷ maximum spacing) + 1 + extras. Apply waste and round up.
Worked examples in metric and imperial units
Illustrative values match Reset example and stay fixed when you edit the calculator. Both columns describe the same calculation; converted inputs are rounded.
Metric worked example
- Run length
- 6 m
- Maximum centres
- 450 mm
- Length per piece
- 2.4 m
- Extra pieces for ends / openings
- 0
- Waste allowance
- 10 %
Studs to buy: 17
Imperial worked example
- Run length
- 19.685 ft
- Maximum centres
- 17.7165 in
- Length per piece
- 7.874 ft
- Extra pieces for ends / openings
- 0
- Waste allowance
- 10 %
Studs to buy: 17
Follow the calculation
Lengths in this working are in metres.
- Intervals = 6 ÷ 0.45, rounded up.
- Add one end piece and 0 extra pieces, then multiply by 1.1 and round up.
- Each counted piece is 2.4 m long.
Reviewed 19 October 2026. How calculations are checked · Report a correction