Room Construction Calculator

How it works

Enter your room dimensions and get instant estimates for wall framing, ceiling framing, sheet materials, linings, and insulation — with NZ-standard nog rows and waste allowance built in.


Room dimensions

Enter length, width, and height in metres. Results update instantly.

Stud & batten centres

Select spacing for wall studs and ceiling battens — 600 mm is standard NZ residential.

Waste allowance

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

Insulation

Select batt type for walls and ceiling. The insulation card hides automatically if none selected.

Nog rows

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

Plasterboard

Wall and ceiling sheets calculated separately with a combined total.