How to use it
- Enter the total area in square metres.
- Enter the expected waste percentage.
- Read the Base slabs and Total slabs results.
What it does – The calculator takes the area you plan to cover and the percentage of waste you expect, then tells you two numbers: the exact count of 0.6 m × 0.6 m slabs needed for the bare area, and the total count after adding waste. Why it matters – Ordering too few slabs means costly delays; ordering too many wastes money and storage space. How to read the results – The “Base slabs” line is the minimum you need for the surface. The “Total slabs” line includes the extra pieces you should order based on your waste %. The tool uses the fixed slab size of 0.6 m by 0.6 m, so each slab covers 0.36 m². By dividing your total area by 0.36 you get the base count, then the waste percentage is applied to that number. Results are rounded up because you can’t purchase a fraction of a slab. This quick calculation helps contractors, DIY homeowners, and landscape designers plan budgets and deliveries with confidence.
Pro tips
- Add 5‑10% waste for cuts and breakage; adjust if the site is complex.
- Always round up to the next whole slab; you can’t buy part of one.
- Order a few extra slabs to match delivery pallet sizes.
- Double‑check measurements before entering; a 0.1 m error multiplies over large areas.
Real-life examples
- A homeowner planning a 30 m² patio wants to know how many slabs to order.
- A contractor estimating material for a 120 m² commercial walkway.
- A landscape designer budgeting for a park renovation with 250 m² of paving.
Case study
Maria needed to pave a 45 m² garden path. Using the calculator, she saw she required 125 base slabs and, after adding a 7% waste factor, ordered 134 slabs. She avoided a costly reorder and finished on schedule.