Patio paver calculator
Count patio pavers from area, paver size, and joint gap, with an optional border course, polymeric sand bags, and crushed-stone base.
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Tool guide
Patio paver calculator: how it works
Practical information to understand the result and use this tool correctly.
About Patio paver calculator
Enter the patio as a rectangle or a known area, then the paver face size and the joint gap. Each paver is assumed to occupy (length + gap) × (width + gap). The count is that coverage divided into the field area, rounded up, then increased by the waste percent you set.
A border course, when enabled, walks the perimeter with the long side of the paver and subtracts that strip from the field. For a known area you must enter the perimeter. Curves, circles, and diagonal herringbone waste more than a straight running bond; raise the waste preset if the pattern is not a simple grid.
The crushed-stone line is area × base depth, with its own waste. It is a planning volume, not a compaction spec. Polymeric sand bags use a labeled coverage that shrinks as the joint gets wider (about 8 m² per 22.7 kg bag at a 3 mm joint). Follow the bag label.
Nothing is uploaded. Zero, negative, and oversized dimensions are rejected so a typo does not look like a real order.
How to use it
- 1Choose meters or feet, then a rectangle or a known area.
- 2Pick a paver preset or enter length, width, and joint gap.
- 3Set waste, and optionally a border course, base depth, and prices.
- 4Review field pavers, border pavers, sand bags, and base volume, then copy the order.
Frequently asked questions
- How is the paver count calculated?
- Coverage per paver is (length + gap) × (width + gap). Field pieces are the field area divided by that coverage, rounded up, then multiplied by 1 + waste. A border course is counted from the perimeter and is not double-counted in the field.
- Does this replace the gravel calculator?
- No. This tool counts pieces and a patio base under those pieces. The gravel calculator is for loose paths, driveways, and bulk mulch or topsoil without a paver module.
- How accurate is the polymeric sand estimate?
- It is a planning factor scaled from about 8 m² per 22.7 kg bag at a 3 mm joint. Wider joints need more bags. Always check the product coverage chart.
- Does the calculation leave the browser?
- No. Dimensions, prices, and the order summary stay on your device.