How many screws per drywall sheet?

The quantity depends on the board dimensions, number of fixing lines and selected screw spacing.

Does screw spacing depend on the wall system?

Yes. Spacing requirements can differ with board type, framing, orientation and assembly.

Can I add a screw allowance?

Yes. A separate planning allowance can be added after the theoretical count.

Drywall fastener layout

Drywall Screw Spacing Calculator | Count & Fixing Layout

Estimate fastener quantity from board dimensions, number of fixing lines and screw spacing. The calculator keeps screws-per-board and total project quantity visible.

Fixing inputs

Board length

Board width

Fixing lines per board

Screw spacing

Number of boards

Fastener allowance (%)

Dimension unit

Screw spacing is an assembly requirement, not a universal constant. Use the applicable board and framing system documentation for the actual fixing pattern.

Enter board dimensions and fixing spacing.

Screw quantity

—

—Screws / board

—Theoretical total

—Planning total

—Rows used

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Screw-count formula

Screws per line = ceiling(board length ÷ spacing) + 1
Screws per board = screws per line × fixing lines
Project count = screws per board × board count
Planning count = project count × (1 + allowance ÷ 100)

Why edge placement matters

The simple line model places a fastener at each spacing interval plus an end position. Real installations may use different edge/setback rules, so the result should be treated as a quantity-planning estimate.

Frequently Asked Questions

Does this calculate edge setbacks?

No. It uses the full board length as the spacing run.

Can I use several fixing lines?

Yes.

Should I add spare screws?

An explicit allowance is available.

Does it choose screw type?

No.