Practical guide
CTM, Cashbuild and Harvey: Which Tile Coverage to Use?
Use product-specific coverage to compare tile quantities from different South African suppliers.
Updated 15 October 2026
Reviewed by the 99Tools team. Editorial and corrections policy.
CTM floor and wall tiles
For a CTM tile calculator comparison, match the same net area, waste percentage and product. Read the box coverage and pack quantity on the selected label or quote. A difference in box rounding can change the purchase even when the measured area matches.
Cashbuild roof tiles
For a Cashbuild roof tile calculator estimate, use the installed coverage of the exact roof profile and confirm whether the quote is per unit or pack. Roof measurements must include slopes and overhangs. Floor tile box coverage does not apply.
Harvey roof products
A Harvey tile calculator must distinguish the actual product. Large steel panels and other Harvey products have different installed coverage. Use the current manufacturer specification for the selected profile, pitch and overlap, rather than a generic tiles-per-m² rate.
Independent estimates
99Tools is not affiliated with CTM, Cashbuild or Harvey. Brand names describe the product information you may enter. Prices, availability and installation details must come from your chosen supplier; this page does not provide live stock or quotations.
Use the related calculators
Apply the explanation above with your own figures. Open a calculator below, check every input and review the result assumptions before making a decision.
Frequently asked questions
How do I calculate tiles per square metre?
Divide 1 by the coverage of one tile in square metres. A 600 × 600 mm tile has a nominal face area of 0.36 m². Use supplier coverage when available, add your chosen waste once, then round up whole boxes.
Does the calculator add waste automatically for a pattern?
No. Enter one allowance agreed with your tiler for the actual layout, cuts and breakage. The example 10% is editable and is not a guarantee for every job.
Is this the CTM tile calculator?
No. 99Tools is independent. Use the exact product label or quote for tiles per box and square metres per box, including products bought from CTM.
Can I use square feet?
Yes. Select feet for surface dimensions and deductions. One square foot is exactly 0.09290304 m². Product dimensions remain in millimetres and box coverage in m².