Plaster Calculator
Calculate how much plaster you need for walls and ceilings based on area, thickness, and plaster type.
Plaster Needed
Plaster coverage depends on the type and application thickness.
Common plaster types:
| Type | Coverage per 25 kg bag | Typical Thickness |
|---|---|---|
| Gypsum (finish) | 70–90 sq ft at 2 mm | 2–3 mm |
| Cement plaster | 25–35 sq ft at 12 mm | 12–15 mm |
| Lime plaster | 40–55 sq ft at 12 mm | 12–20 mm |
| One-coat (multi-finish) | 50–70 sq ft at 10 mm | 10–13 mm |
Coverage formula:
Volume = Area × Thickness
Bags = Volume / Coverage per bag
Tips:
- Add 10% for waste and uneven surfaces
- Two coats are standard for most applications
- Allow proper drying time between coats (24–48 hours)