# Plaster Calculator

> Cement bags and sand for plastering, from area, thickness and mortar mix.

Calculate cement bags and sand for plaster free: enter area, thickness (6 to 20 mm) and mix ratio. Instant step-by-step results in your browser.

- **Canonical:** https://build.ailovekit.com/calculators/plaster-calculator/
- **Category:** Calculator
- **Processing:** Runs entirely in your browser. Files are never uploaded to AiLoveKit servers.

## How It Calculates

- **Formula:** Dry mortar = area × thickness × 1.33; split by mix ratio

**Inputs:**

- Plaster area
- Thickness
- Mortar mix
- Waste %

All calculation runs locally in your browser; results update as you type and include the substituted working.

## Plaster Quantities Without the Site Guesswork

Plastering mixes small numbers - 12 mm here, 1:4 there - into surprisingly large material orders. AiLoveKit's **plaster calculator** multiplies your area by the chosen thickness, applies the 1.33 dry-mortar factor and splits cement from sand by your mix ratio, with the full working shown.

## Common Plaster Specs

- **Internal walls** - 12 mm at 1:4.

- **External walls** - 15 to 20 mm at 1:6.

- **Ceilings** - 6 to 10 mm at 1:4.

## Frequently Asked Questions

**Which thickness do I need?**

12 mm is standard for internal brick walls, 6 mm for smooth concrete surfaces, and 15 to 20 mm for external or uneven walls.

**What mix ratio should I use?**

1:4 (cement:sand) for internal walls and ceilings; 1:6 for external work and where economy matters more than strength.

**Does this cover both sides of a wall?**

The calculator works on whatever area you enter. For both faces, enter double the wall face area.

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Source: https://build.ailovekit.com/calculators/plaster-calculator/
Part of AiLoveKit: https://build.ailovekit.com/
Machine-readable index: https://build.ailovekit.com/llms.txt