Build & renovate
Stud Wall Calculator
Studs are wall length over spacing plus one for the end - then plates top and bottom, and noggins mid-height.
Calculator
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How it works
Studs = ceiling(length / centres) + 1. Timber = studs x height + 2 x length for the plates, plus 10%. Use 400 mm centres where plasterboard is heavy or the wall carries load; 600 mm suits standard partitions.
Frequently asked questions
400 or 600 mm stud centres?
600 mm suits standard 12.5 mm boarded partitions; 400 mm stiffens walls for tiling, heavy fixtures, or 9.5 mm board. Both match board widths (1200 mm).
What timber for stud walls?
CLS 38 x 63 or 38 x 89 is the norm. A 4 m partition at 2.4 m high on 600 centres: 8 studs plus plates - about 29 m of timber.