Stud Wall Calculator
Work out how many vertical studs your wall needs.
Vertical studs
11studs
- Spacing used
- 400 mm centres
Includes a stud at each end. Add extras for openings, corners, junctions and structural design.
v1.1 · Reviewed September 2026
How this is worked out
The wall length in millimetres is divided by the stud spacing and rounded up to give the number of bays, then one stud is added so there is a stud at each end.
Worked example
- Wall length 4 m
- Spacing 400 mm centres
4000 ÷ 400 = 10 bays, plus 1 end stud
11 studs
Assumptions and limits
- Counts vertical studs only. Head plate, sole plate and noggins are not included.
- Openings, corners, junctions and any structural requirement need extra studs.