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Tile Backer Board Calculator

Estimate backer board sheets, screws, seam tape, and setting-bed needs from tiled area and sheet size.

Inputs

Area and sheet

Range: 1–100,000 ft2

Range: 1–12 ft

Range: 1–12 ft

Allowance, fasteners and bed

Range: 0–30

Range: 0.25–4

Fastener spacing follows the board maker's schedule; 1 per sq ft is a common field value.

Range: 0–2,000 ft

Alkali-resistant tape or mesh for board seams, corners and penetrations. Enter 0 if the board does not need taped seams.

A cement mortar bed needs a minimum board thickness and a wet-area rated board; a thin-set bed is the usual residential choice.

Result

Area to board
110.0
Screws needed
110.00 screws
Coverage per sheet
15.0
Backer board sheets
8.00 sheets
Seam tape length
0
Thin-set bed: 1/4 in or thicker board is suitable on a stable substrate; tape seams per the board maker

How this was calculated

Backer board sheets
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Planning estimate only. Verify the entered measurements, product data sheet, site conditions, and applicable local requirements before ordering or installing. This calculator does not establish product suitability or code compliance.