Metal Stud Calculator
Calculate the number of metal studs, track lengths, cladding panels and screws for a light-gauge steel-framed partition wall.
What this calculates
Calculates wall area, number of vertical studs, total linear meters of track (top + bottom), number of cladding panels for one face (with waste), and estimated screws.
Formula used
Studs = ceil(length ÷ spacing) + 1 (end stud). Track = 2 × length. Panels = ceil(area × (1 + waste%) ÷ panel area). Screws = panels × 28.
Worked example
A wall 5 m × 2.6 m, studs at 40 cm, 1.2 m × 2.4 m panels, 10% waste: studs = ceil(5 ÷ 0.40) + 1 = 14. Track = 10 m. Panel area = 2.88 m². Panels = ceil(13 × 1.10 ÷ 2.88) = ceil(4.97) = 5. Screws = 140.
Standard spacings
400 mm (16 in) o.c.: standard for 12.5 mm drywall. 600 mm (24 in) o.c.: acceptable for 15 mm drywall in non-structural partitions. 300 mm (12 in) o.c.: heavy-duty, tile backing or high-traffic areas.
When not to use this calculator
Load-bearing metal stud walls, exterior sheathing systems, seismic or high-wind applications require structural engineering. This calculator is for non-structural interior partitions only.
Frequently asked questions
What stud spacing for drywall?
400 mm (16 in) for 12.5 mm board, 600 mm (24 in) for 15 mm board. Check the drywall manufacturer's span table.
How many screws per drywall sheet?
About 28 screws for a standard 1.2 × 2.4 m sheet at 400 mm stud spacing. This calculator uses that figure.
What is the difference between studs and tracks?
Studs are vertical members; tracks are horizontal channels at floor and ceiling that the studs slot into. Each wall needs 2 × wall length of track.
Can I use 600 mm spacing?
Yes for non-structural partitions with 15 mm drywall — fewer studs, lower cost. Verify with local code and board manufacturer.
Assumptions
- Panels calculated for one face only — double panels and screws for a two-face wall.
- Screws estimated at 28 per panel (standard 400 mm spacing layout).
- Does not include doors, windows, insulation, joint tape or compound.
- Non-structural interior partitions only.
Load-bearing or exterior steel stud walls, seismic design and fire-rated assemblies require engineering review and specific tested systems. Do not use this calculator for structural applications.
Common mistakes
- Forgetting the end stud — always add one stud at each end of the wall.
- Counting panels for only one face on a double-clad wall.
- Not accounting for door and window openings — add headers and extra studs around openings.