Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Coverage must match the selected product, notch, substrate and installation method. Tool does not choose a mortar or trowel.
Example Calculation
- Tile area: 25 m²
- Manufacturer coverage per bag: 5 m²/bag
- Waste allowance: 10 %
Tile area = 25 m²; Manufacturer coverage per bag = 5 m²/bag; Waste allowance = 10 %. Primary result: 6.
Frequently asked questions
How do I use this calculator?
Enter tile area, manufacturer coverage per bag, waste allowance. The result updates automatically. Use Reset to restore the example values.
What method does it use?
bags=ceil(area ×(1+waste)/coverage).. Coverage must match the selected product, notch, substrate and installation method. Tool does not choose a mortar or trowel.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.