Example 1 — Standard tiled floor
- Area: 18 m²
- Consumption: 3.5 kg/m²
- Waste: 10%
- Bag size: 25 kg
You need 69.30 kg of adhesive
That equals 3 full bags
This is a typical case where bag count matters more for purchasing than the kilogram value alone.
Tile adhesive requirement
Enter tiled area and adhesive coverage — we’ll figure kilograms, full bags, and a rough cost with waste.
Shopping estimate: kg from area and coverage (or trowel notch), plus waste, then full bags. Need square footage or a tile count first? Try floor area or tile quantity, then come back for adhesive.
Results
Enter data and click Calculate.
How the results are calculated
kg = area × consumption × type factor × (1 + waste%); bags = ceil(kg ÷ bag size). Bed thickness converts to consumption at roughly 1.5 kg/m² per mm.
How to use this calculator
- Enter the tiled area.
- Add the adhesive consumption in kg/m² based on the product datasheet or planned layer.
- Include a waste percentage for practical losses and site handling.
- Read the result in kilograms and full bags.
Example scenarios
Example 2 — Smaller bathroom
- Area: 7.2 m²
- Consumption: 4.0 kg/m²
- Waste: 8%
- Bag size: 20 kg
You need 31.10 kg of adhesive
That equals 2 full bags
Even on smaller areas, reserve still matters because some material is always lost during mixing, spreading, and touch-ups.
Example 3 — Larger area with higher consumption
- Area: 24 m²
- Consumption: 5.2 kg/m²
- Waste: 12%
- Bag size: 25 kg
You need 139.78 kg of adhesive
That equals 6 full bags
With larger tile formats or a thicker adhesive layer, the total rises quickly, which is why it is better to calculate it early instead of guessing.
FAQ
What drives adhesive use?
Tile format, substrate, bed thickness, and whatever the manufacturer’s datasheet says.
Is the result exact for every product?
No — it’s a buying aid. Best bet: enter the coverage from that adhesive’s technical sheet.
Why show bags, not just kg?
Because that’s how you buy on site. Kilograms are for the math; bags are for the shopping list.
Is waste worth adding?
Yes. Some always stays on tools, in the bucket, during touch-ups, and on uneven floors.
Does this replace counting tiles?
No. Area or tile count first — adhesive is the next step.
What usually pushes real use higher?
Uneven substrate, thicker bed, large-format tiles, and ordinary on-site losses.
Small bathroom — still worth being precise?
Yes. On small jobs it’s easy to underbuy “by eye” and lose a day reordering.
What else might help next?
Tile quantity or floor area — the natural pair before adhesive.