Estimate labour hours, paint quantity and total job cost for interior and exterior painting jobs.
For a repaint of 100 m² of interior walls (1 coat), an experienced painter averages approximately 3–4 hours. Two coats on new plasterboard takes 6–8 hours plus prep time. This calculator uses industry-standard production rates for each surface type.
Measure the surface area, determine the number of coats and surface type, calculate labour hours at your hourly rate, add material costs (paint, primer, sundries), then add your profit margin. This calculator handles the labour and paint estimate — add sundries (brushes, tape, drop sheets) separately.
Interior repainting in NZ typically ranges from $10–$20/m² for labour only, depending on the painter's rate and job complexity. New builds with prep work run $20–$35/m². Exterior weatherboard painting is $25–$50/m² due to additional preparation and access requirements.