Walls and ceilings, then openings
Measure the surfaces that receive board. Deduct doors and windows. Mix 4×8 and 4×12 in one takeoff only if you split the lines — coverage is not the same.
Waste rises with stairs, drops and odd corners. Keep it visible. Fire-rated or moisture boards belong on separate lines from standard 1/2 in.
Fasteners after sheets
Walls often take 28–36 screws per 4×8 sheet; ceilings more. Construclytic’s fastener calculator rounds to 1,000-count boxes after a per-sheet figure and waste. That is a hang count, not a finishing-level spec.
Do it in order
- Measure net wall and ceiling area after openings.
- Divide by the selected sheet coverage and apply waste, then round up to whole sheets.
- Add fasteners, tape, compound and bead as separate estimate lines.
Worked example — 18 of 4×8 sheets, 32 screws, 5% fastener waste
18 sheets × 32 screws × 1.05 ≈ 605 screws, which is one 1,000-count box. The board count itself still comes from net area, not from the screw box.
Planning boundary
These tools count sheets and fasteners. They do not select fire ratings, acoustic assemblies or finishing levels.
Do I count both sides of a partition?
If both sides receive board, yes — two faces.
Is a sheet count a labour hour?
No. Hanging and finishing production rates stay with the crew.
Where does paint come in?
After finishing. Paint calculators do not replace a board count.