Fixed metric example
How many 60×60 cm tiles cover 20 m²?
A 600×600 mm tile covers 0.36 square metre. Dividing 20 m² by that face area gives 55.556, so the base count rounds up to 56 tiles.
Keep the units consistent
Sixty centimetres is 0.6 metre. Multiplying 0.6 by 0.6 gives 0.36 m² per tile. TileCalc keeps this ratio exact internally rather than repeatedly rounding converted areas.
Why the base count is 56
The exact division is greater than 55, and a fraction of a purchased tile is not available. The base count therefore rounds upward. Any separate allowance is applied to the unrounded ratio before the final purchase count is rounded.
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