Free Paint Calculator South Africa — How Much Paint Do I Need?
Use Rich Paints' free online paint calculator to estimate exactly how much paint you need for any project in South Africa. Enter your wall area or measure each wall individually and get an instant recommendation in litres with pack quantities priced in South African Rand.
Paint Coverage Rates — South African Reference Guide
| Paint Type | Coverage per Litre | Recommended Coats | Best For |
|---|---|---|---|
| Interior Acrylic | 10–12 m²/L | 2 coats | Walls & ceilings (smooth plaster) |
| Exterior Acrylic | 8–10 m²/L | 2 coats | Outside walls & facades |
| Roof Paint | 4–6 m²/L | 2 coats | Corrugated iron & IBR roofing |
| Primer / Undercoat | 8–10 m²/L | 1 coat | New plaster, bare wood, metal |
| Textured Surfaces | 6–8 m²/L | 2 coats | Rough plaster & face-brick |
How to Calculate Paint — Step by Step
- Choose your method: Quick estimate (enter m²), Measure walls (wall by wall with deductions), or Roof (with pitch factor correction).
- Enter measurements: Width × height for each wall in metres. Or tap a room preset: small room (28 m²), medium (48 m²), large (72 m²).
- Deduct windows and doors: Standard window = 1.5 m², standard door = 2.0 m². The calculator subtracts these automatically when you enter the count.
- Adjust surface and coats: Set to 2 coats (always recommended). Choose smooth, textured, or rough surface. Add 10% wastage allowance.
- Read your results: The calculator shows litres needed and the most cost-effective pack combination. Order factory-direct from Rich Paints.
Paint Calculation Formula
Litres needed = (Wall area m² × surface factor × number of coats) ÷ coverage rate (m²/L) × (1 + wastage %). The calculator handles all variables automatically.
Frequently Asked Questions — Paint Calculator South Africa
- How much paint do I need for a room?
- For a medium room (~48 m² wall area), approximately 12 litres for 2 coats on smooth plaster with 10% wastage. Use our calculator for your exact dimensions.
- How many coats of paint should I use?
- Always 2 coats for professional coverage and UV protection. A single coat rarely gives full opacity.
- How much paint for a 100 m² roof?
- Approximately 40 litres for a corrugated iron roof — 2 coats at 5 m²/litre.
- Does surface texture affect how much paint I need?
- Yes. Textured surfaces use 12% more, rough surfaces up to 25% more than smooth plaster.
- What is the coverage rate for interior paint in South Africa?
- Rich Paints interior acrylic covers 10–12 m²/L on smooth plaster. Exterior: 8–10 m²/L. Roof paint: 4–6 m²/L.
- Where can I buy paint in South Africa?
- Rich Paints sells factory-direct from Centurion (160 Johann Ave, Raslouw AH) and online at richpaints.co.za/shop with delivery across Gauteng.
Shop Paint After Calculating
Rich Paints manufactures premium interior, exterior and roof paint in Centurion and sells factory-direct. Order online at richpaints.co.za/shop or call 012 012 6224. Delivery across Gauteng and South Africa.