Drop Ceiling Calculator
Calculate gypsum board or fiber panels, grid profile length and screws for a drop or suspended ceiling in any rectangular room.
What this calculates
Calculates ceiling area, gypsum board panels (1.2×2.4 m), total grid and perimeter profile length, and approximate screw count for a steel-framed suspended ceiling.
Formula used
Area = length × width. Panels = ceil(area × (1 + waste) ÷ 2.88 m²). Perimeter = 2 × (length + width). Intermediate grid rows = ceil(min dimension ÷ spacing) − 1. Total grid = perimeter + rows × max dimension.
Worked example
A 5 m × 4 m room: area = 20 m². With 10% waste: 22 m² ÷ 2.88 = 8 panels. Perimeter = 18 m. At 60 cm spacing: 6 intermediate rows × 5 m = 30 m. Total grid ≈ 48 m.
Grid spacing options
60 cm (24 in): standard for gypsum board ceilings — stiffer, better acoustic performance. 120 cm (48 in): used for larger panels or where fewer intermediate supports are acceptable. Check the system manufacturer's specifications for maximum allowable spans.
When not to use this calculator
T-bar suspended tile grids (600×600 mm or 1200×600 mm tiles) have a different grid system. For those, use the tile count per m² and the specific runner/cross-tee layout from the manufacturer.
Frequently asked questions
How many ceiling panels do I need?
Room area with waste ÷ 2.88 m² per panel (1.2×2.4 m), rounded up.
How much grid track do I need?
Perimeter + intermediate runners. Depends on room size and grid spacing (60 or 120 cm is standard).
What is the standard grid spacing?
60 cm is the most common for gypsum board ceilings. 120 cm for larger panels. Check the system spec.
What panel size does this use?
1.2 m × 2.4 m (standard gypsum board). For ceiling tiles (600×600 mm), calculate separately as ~2.78 tiles/m².
Assumptions
- Panel size: 1.2 m × 2.4 m (2.88 m² per panel).
- Screws: ~28 per panel.
- Grid = perimeter + intermediate runners at the specified spacing.
- Does not include suspension wires, hangers, joint compound or access hatches.
Fire-rated ceiling assemblies and acoustic ceilings require specific panel types, grid systems and installation details. Do not use this estimate for code-compliance or fire-rating purposes.
Common mistakes
- Not planning the grid layout to avoid narrow border tiles at the walls.
- Forgetting suspension wires and anchor points in the slab above.
- Using gypsum board in wet areas without moisture-resistant panels.