Tile Adhesive Calculator

How to use

1. Enter the surface you are tiling, in square meters, in the Area field.
2. Choose the Tile size band: small, medium or large format - bigger tiles need bigger trowel notches.
3. Set the Bed thickness (mm); six millimeters suits most walls and floors.
4. Press Calculate / Generate to see adhesive in kilograms.
5. Read the 20kg bags line, already rounded up so you can order directly.
6. Add one spare bag for wastage and substrate unevenness, then confirm against the coverage chart on the bag you buy.

About this tool

Adhesive consumption follows trowel notch size plus any back-buttering for large tiles; ~0.85 kg per m² per mm of combined bed is the manufacturer rule of thumb.

Adhesive is the hidden line item of every tiling job: buy too few bags and the work stops mid-wall while the color batch changes; buy too many and the surplus hardens in the garage. This calculator sizes the order before you visit the shop. It estimates consumption from the two factors that actually drive it - the trowel notch your tile size demands and the bed thickness you plan to build - using the manufacturer rule of roughly 0.85 kilograms of powder per square meter per millimeter of combined bed. The result appears in kilograms and 20 kilogram bags.

Two habits keep the estimate honest. First, add a margin: uneven substrates, textured tile backs and generous back-buttering on large-format tiles all push real consumption above the calculation, so one spare bag is cheap insurance. Second, check the coverage chart printed on the adhesive bag you actually buy, because deformable and rapid-set formulas differ from standard powder. The tool assumes flat, primed surfaces and normal ceramic or porcelain tiles; heavily uneven floors can consume half again as much. It quotes material only - primers, spacers and grout are separate purchases with their own math.

FAQ

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