How it works

1 Wall length & height

Enter dimensions in metres. Results update live as you type.

2 Stud centres

600 mm is NZ standard. Walls 2.4–3.0 m high require 400 mm per NZS 3604 — the calculator will remind you.

3 Nog rows

Auto-calculated: 2 rows ≤2.4 m, 3 rows ≤3.2 m, 4 rows above 3.2 m.

4 Waste allowance

Adds a buffer for cuts and offcuts. 10% is a safe default for most jobs.

5 Plasterboard

Calculated at 1200 mm sheet width across the full wall length.

6 Paint area

Wall length × height — useful for estimating paint and primer quantities.