CEILING
False Ceiling Calculator: Gypsum Boards & Channels
How to calculate false ceiling materials: gypsum boards, perimeter channel, intermediate channels, ceiling sections, hangers, clips and screws for any room size.
Assumptions used EDIT ▾
GI sections usually come in 3 m or 3.66 m.
Gypsum about 650–800, cement fibre about 1,200–1,350.
Intermediate channels are hung from the slab with soffit cleats, anchor fasteners and GI hangers; ceiling sections are clipped across them; the perimeter channel is nailed to the walls at about 610 mm. Spacings differ between makers and tenders (intermediate channels 900–1220 mm), so use your drawing or the maker's guide.
BOARDS
6boards
1830 × 1220 mm · 120 sq ft of board
- Perimeter channel4 pieces of 3.66 m
- 44 ft
- Intermediate channel2 rows · 2 pieces of 3.66 m
- 20 ft
- Ceiling section6 rows · 7 pieces of 3.66 m
- 72 ft
- Hangers (soffit cleat + anchor fastener)
- 6
- Connecting clips
- 12
- Wall nails / screws for perimeter
- 22
- Drywall screws
- 168
- Joint tape
- 16 m
- Jointing compound
- 4 kg
- Board weighteach · 114 kg in all
- 19.0 kg
How it’s calculated
Boards = ceiling area × (1 + wastage) ÷ board area; intermediate channels every 1220 mm, ceiling sections every 457 mm
Example: A 12 × 10 ft room: 120 sq ft → about 6 boards of 6 × 4 ft, 44 ft of perimeter channel.
Questions
How many gypsum boards for a 10 × 12 room?+
The ceiling is 120 sq ft. A 6 × 4 ft board covers about 24 sq ft, so 5 boards plus wastage: buy 6.
What is the spacing of channels in a gypsum false ceiling?+
Commonly intermediate channels at about 1220 mm and ceiling sections at about 457 mm across them, hung from the slab at about 1220 mm. Follow your drawing or the board maker's guide.
Estimates for planning, based on the assumptions shown. They are not a guarantee of quantities or professional engineering advice; check critical work with a qualified professional.