# Ceiling Panel Count Calculator

> Count the suspended-ceiling tiles a room needs from its size and the tile size, with a waste allowance, the number of boxes and wall angle lengths.

Category: Construction · Applies to: Worldwide · Last updated: 2026-10-29
Interactive calculator: https://calculators.geekmidst.com/calculators/ceiling-panel-count-calculator

Count the tiles across and along the room, rounding each up because cut tiles at the edges still use a whole tile, then add the wall angle around the perimeter.

Also called: Ceiling tile calculator, Drop ceiling calculator.

## Inputs
- Room length (unit m; default 6)
- Room width (unit m; default 4)
- Tile length (along the room) (unit mm; default 600)
- Tile width (unit mm; default 600)
- Waste allowance (unit %; default 5)
- Tiles per box (default 16)
- Wall angle length (unit m; default 3)

## Results
- Tiles to buy
- Layout (along × across)
- Boxes
- Ceiling area
- Perimeter
- Wall angle pieces

## Formula

```
Tiles = ⌈L ÷ tile length⌉ × ⌈W ÷ tile width⌉ × (1 + waste);  Wall angle = ⌈2(L + W) × (1 + waste) ÷ piece length⌉
```

Where:
- L, W: room length and width
- waste: allowance for breakage and spares

## Worked example
1. Along: 6 ÷ 0.6 = 10 tiles; across: 4 ÷ 0.6 = 6.67 → 7 tiles.
2. Tiles = 10 × 7 = 70, which is 5 boxes of 16.
3. Perimeter = 2 × (6 + 4) = 20 m → 7 pieces of 3 m.

**Result:** A 6 × 4 m room needs 70 tiles of 600 × 600 mm (5 boxes) and 7 lengths of 3 m wall angle.

## What the result means

Centring the grid so border tiles are at least half a tile looks better; it can add a row in each direction, so check the setting-out before ordering.

## Assumptions and limits
- Each cut border tile uses a whole tile.
- Main runners, cross tees and hangers depend on the grid system and are not counted.

## Questions

### How many 600 × 600 tiles per m²?

Each tile is 0.36 m², so about 2.78 tiles per m² before cuts and waste.

### Can offcuts be reused?

Rarely: the edge profile is on the factory edge, so cut pieces usually only fit at the room perimeter.

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_Quantities are estimates. Confirm requirements with your engineer or supplier before ordering materials._

Source: GM¹X CalcVerse — https://calculators.geekmidst.com/calculators/ceiling-panel-count-calculator