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Stud wall calculator: how much timber for a partition?
Estimate the studs, rails and fixings for a timber stud partition, with optional plasterboard and insulation. Enter the wall length and height, timber size and stud spacing.
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How the calculation works
A stud wall has a sole plate along the floor, a head plate at the top, and vertical studs between them, usually at 400 mm or 600 mm centres, with noggins between the studs for stiffness. The calculator counts studs from the wall length and spacing, adds plates, noggins and extras for corners and openings, and applies your waste allowance.
Plasterboard and insulation are added from the wall area if you select them.
Choosing timber and spacing
CLS timber is planed with rounded edges and is the usual choice for internal partitions. Use treated timber where the wall may get damp.
400 mm centres give a stiffer wall and suit most plasterboard; 600 mm centres use less timber but need thicker board.
Worked example
A 4 m long, 2.4 m high partition in 50 × 100 mm CLS studs at 400 mm centres:
| Material | Quantity | Price (ex VAT) |
|---|---|---|
| Premium CLS Softwood Studding 100 x 50mm x 2.4m (4" x 2") NOM PEFC/16-37-158 | 18 | £108.00 |
| Paslode Galvanised-Plus IM360 Collated Nails 3.1mm x 90mm 1100 Pack | 1 | £90.44 |
| Materials total | £198.44 | |
Today's prices, excluding VAT and delivery. Labour, plant hire and some items are priced when you request a quote. Use the calculator above for your own measurements.
Frequently asked questions
What spacing should studs be at?
400 mm or 600 mm centres are standard, matching the width of a plasterboard sheet so the board edges land on a stud.
What size timber is used for a stud wall?
50 × 75 mm or 50 × 100 mm CLS is typical for internal partitions; deeper timber gives a stiffer wall and more room for insulation.
Do I need noggins?
Usually yes. Noggins fixed between studs stiffen the wall and give a fixing for heavy items and board edges.