16 in on center is standard; 24 in for advanced framing where allowed.

Why a double top plate?

It ties wall sections together and spreads loads between studs.

How many studs per foot of wall?

A quick rule is one stud per foot of wall, which covers corners and openings.

Can I use metal studs instead?

Yes for non-load-bearing walls; wood is still standard for bearing walls.

2×6 allows thicker insulation and is common on exterior walls.

How do I frame a corner?

Three-stud corners or California corners leave nailing for drywall.

Wall stud calculator

Wall length and height, spacing and openings: you get studs including opening extras, bottom and double top plates, and header length.

Purchase quantity

22 unit

Net measurement: 20 unit · Waste 10 %

Studs22 unit
Stud length8.202 ft
Bottom plate and double top plate64.961 ft
Headers (est. 4 ft per opening)7.874 ft

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How it's calculated (visible formula)

studs = ceil(length ÷ spacing) + 1 + 2 × openings; plates = 3 × length

Net geometric measurement, no waste.
Adjustable waste % for cuts and breakage.
Purchase rounded up to sellable units (boxes, bags, buckets, boards).

See methodology and formula versions

How to calculate it, step by step

Measure wall length and height.
Pick stud spacing (16 or 24 in on center).
Studs = length ÷ spacing + 1.
Add two per opening (king and jack) plus corners.
Work out bottom plate, double top plate and headers.

Worked example: 20 ft × 8 ft wall at 16 in OC with 2 openings

20 ft ÷ 16 in = 15 + 1 = 16
+2 × 2 openings = 20
+10% → 22 studs

→ 22 studs, 60 ft of plate and 8 ft of header.

Common mistakes

Forgetting corner and opening studs.
Counting only one top plate.
No backing for intersecting walls.

Pro tips

Lay out from one end so studs land on sheathing joints.
Add blocking for cabinets, grab bars or heavy fixtures.
Use dry lumber (≤ 19% MC) to avoid twisting.
Anchor the sole plate to the slab per code.

From calculation to quote

Add labour, overhead and your margin, and generate the professional PDF.

Create quote Calculate margin & GST

FAQs

Stud spacing?: 16 in on center is standard; 24 in for advanced framing where allowed.
Why a double top plate?: It ties wall sections together and spreads loads between studs.
How many studs per foot of wall?: A quick rule is one stud per foot of wall, which covers corners and openings.
Can I use metal studs instead?: Yes for non-load-bearing walls; wood is still standard for bearing walls.
2×4 or 2×6 studs?: 2×6 allows thicker insulation and is common on exterior walls.
How do I frame a corner?: Three-stud corners or California corners leave nailing for drywall.

Sources and standards

Maintained by Srikanta M · Formula v1.0.0 · Verified 2026-09-10 · Updated 2026-09-10 · Limits: quantity estimation, not structural design or site supervision.