Paver Calculator
Paver calculator works out Base area and Waste-adjusted area to buy from What to work out, Room length and Room width. The default figures on this page give tiles of 40; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
3 steps
- Purchase area = 10 x (1 + 0/100) = 10
- Tiles = ceil(10 / 0.25) = 40
- Total = material 40 + labour 30 + fixed fees 0 = 70
Its 5 worked examples are re-run on every release, last on 15 September 2026. What changed
Keep this result
Save it, change one figure, then compare the two
The calculation stays free. Save this scenario, adjust one assumption, save that too, and put them side by side to see exactly what the change costs you. A free account keeps 5 scenarios and 2 comparisons; Personal makes both unlimited and adds exports and private links. Nothing is saved unless you press Save.
What the paver calculator calculates
Turns a room measurement into a waste-adjusted purchase area and then into whole tiles, whole flooring packages, or a carpet and installation cost estimate from your own unit prices.
How to use this paver calculator
Enter What to work out, Room length, Room width and Net floor area. Base area updates as you type. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Base area, Waste-adjusted area to buy and Tiles.
The method follows OpenStax, Elementary Algebra 2e, Solve Geometry Applications: Volume and Surface Area (rectangular area = length x width) and NIST Special Publication 811, Appendix B.9 (exact length and area conversion factors).
What you can compare
Change one input at a time to see how it affects Base area, Waste-adjusted area to buy and Tiles. The inputs you can vary are What to work out, Room length, Room width, Net floor area, Tile face area and Tile length.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
How do I calculate how many pavers I need?
Turns a room measurement into a waste-adjusted purchase area and then into whole tiles, whole flooring packages, or a carpet and installation cost estimate from your own unit prices. Open “How this is worked out” beside the result to see each step for your own figures.
How do I calculate how much paver base I need?
It needs What to work out, Room length, Room width, Net floor area, Tile face area and Tile length. Nothing else is required, and the figures stay in your browser.
How many pavers for a 20x20 patio?
On the figures this page opens with — net floor area 10, tile face area 0.25 and waste allowance 0% — the tiles is 40. No single number fits everyone: change any figure above and the answer updates as you type, with each step of the arithmetic beside it.
How many pavers for a 16x16 area?
The result gives Base area, Waste-adjusted area to buy, Tiles, Packages, Tile module area (tile plus grout joint) and Material cost, each labelled with its unit so the figure can be read on its own.
What information do I need for the paver calculator?
You need What to work out, Room length, Room width, Net floor area, Tile face area, Tile length, Tile width and Grout joint width. The page opens with default figures that give tiles of 40, so you can see the scale before entering your own.
What does this paver calculator show?
It shows Base area, Waste-adjusted area to buy, Tiles, Packages, Tile module area (tile plus grout joint), Material cost, Labour cost and Estimated total cost, with the working and any warnings for your entries.