Enter garden area and paver dimensions in seconds. Add joint spacing and waste for accuracy. Download clean reports, then start laying stones confidently today.
Tip: Keep all dimensions in the same unit. Use joint gap for spacing between stones.
These examples assume rectangular stones laid in rows, with small joints and waste. Use your own measurements for accurate purchasing.
| Project | Area | Stone size | Joint gap | Waste | Estimated stones |
|---|---|---|---|---|---|
| Small patio | 12.0 m2 | 0.2 x 0.1 m | 0.003 m | 7% | ~ 650 |
| Garden path | 80 ft2 | 8 x 4 in | 0.25 in | 10% | ~ 370 |
| Round seating pad | 7.1 m2 | 0.3 x 0.3 m | 0.004 m | 5% | ~ 85 |
Accurate coverage starts with a reliable project area. Measure length and width for rectangles, diameter for circles, or base and height for triangles. For irregular gardens, split the space into zones and sum each rectangle. The calculator converts everything to a common base unit, so a 12 m2 patio and an 80 ft2 path stay comparable. Consistent units prevent expensive ordering mistakes before you buy stone.
Joint spacing changes how many stones fit in the same footprint. The calculator treats each stone as a "module" that includes the gap on all sides. For example, a 200 x 100 mm stone with a 3 mm joint uses 0.203 x 0.103 m of plan area. Increasing the joint to 10 mm raises the module area further, reducing count but increasing joint width.
Waste allowance protects you from unexpected cuts, breakage, and pattern alignment. Straight running bonds often need 5-7% extra, while herringbone and curved borders may require 10-15%. If you must match color blends, add more so you can reject mismatched pieces. The calculator applies waste after the raw count, then rounds up. That rounding matters most on small projects where one extra box is common.
Optional layer estimates support complete material planning. Bedding sand is commonly 20-40 mm thick, and base aggregate often ranges from 75-150 mm, depending on soil and load. Volume is simply area times thickness, reported in cubic meters for ordering. If your supplier sells by ton, add a compaction buffer and convert using the product's bulk density. Always check local drainage and edging requirements first.
Exports help you turn calculations into purchases and records. The CSV download is useful for spreadsheets, quotes, and cost comparisons across stone sizes or joint widths, even for budgeting. The PDF is a shareable snapshot for installers and suppliers, showing the project area, stone dimensions, gaps, waste, and final quantity. Save each version when you change the layout so you can trace why orders differed later.
Break the space into simple rectangles. Enter them under Multiple Zones, then the calculator sums the areas automatically. This method reduces estimating error compared with guessing one overall dimension.
Yes, if you plan sand joints or spacers. A larger gap increases the effective module size and changes the stone count. For tight joints, enter 0.
Use 5-7% for straight layouts with minimal cuts. Use 10-15% for herringbone, curves, or lots of borders. Increase slightly if you must color-match stones.
The quantity targets field stones only. If you plan soldier courses, contrasting borders, or special edge pieces, calculate those separately and add them to your order.
Volume equals project area times thickness. Enter typical layer thicknesses to get cubic meters. If you buy by bag or ton, convert using the supplier's stated coverage or bulk density.
Suppliers may price by packs, allow different joint assumptions, or include a standard waste factor. Compare your stone size, joint gap, and waste settings with their specification, then round to full packs.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.