How Many Pavers for a 15x15 Patio?
Pavers to buy
1,089 pavers
225 sq ft of patio, 4 by 8 in pavers, 6 in compacted base, 1 in bedding sand, ten percent waste.
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How that number is worked out
These are the figures this page was built with and every line the calculator produces from them. Change anything above and all of it moves.
- Patio length15 ft
- Patio width15 ft
- Paver length8 in
- Paver width4 in
- Paver thickness2.375 in
- Joint width0.0625 in
- Compacted gravel base6 in
- Bedding sand1 in
- Waste allowance10 %
Pavers to buy1,089 pavers
| Patio area | 225 sq ft |
|---|---|
| One paver covers | 0.227 sq ftface plus one joint |
| Pavers per sq ft | 4.4 |
| Pavers before waste | 990 |
| Base gravel, compacted | 4.17 cu yd |
| Base gravel to order | 5 cu yd20% added for compaction |
| Base gravel weight | 7 tons |
| Bedding sand | 0.69 cu yd1,875 lb |
| Polymeric sand, 50 lb bags | 375 sq ft per bag |
| Edge restraint | 60 ft |
The material list this produces
| Pavers | 1,089 |
|---|---|
| Base gravel, cu yd | 5 |
| Bedding sand, cu yd | 1 |
| Polymeric sand, 50 lb bags | 3 |
| Edge restraint, ft | 60 |
| Edging spikes | 60 |
| Geotextile fabric, sq ft | 248 |
Patio size compared
Fifteen feet across. The first column is the area, and it rises in step with the pavers because every row on this calculator comes off the area except the last one, which comes off the perimeter.
| Patio size | Pavers to buy | Patio area | Edge restraint |
|---|---|---|---|
| 15 by 12 ft | 871 pavers | 180 sq ft | 54 ft |
| 15 by 15 ft | 1,089 pavers | 225 sq ft | 60 ft |
| 15 by 20 ft | 1,451 pavers | 300 sq ft | 70 ft |
| 15 by 25 ft | 1,814 pavers | 375 sq ft | 80 ft |
| 15 by 30 ft | 2,177 pavers | 450 sq ft | 90 ft |
What else matters here
One thousand and eighty nine pavers over 225 sq ft. A square patio has one advantage and one trap, and both come from the same place: it only looks square if it is square.
Every course of pavers runs parallel to a string line, so an out of square layout does not hide. It shows up as a cut that tapers along one edge, getting wider course after course, and by the far side it is obvious from the kitchen window. On a rectangle with a long axis it is easy to miss until late; on a square it is visible almost immediately, which is the advantage, provided the layout was checked before the base went in.
The check is the diagonals. On a true square the two diagonals are equal, and on this one each is a shade over 21 ft 2 in. Measure both corner to corner and adjust until they match, then check the sides again, because equal diagonals on unequal sides gives a rectangle rather than a square. Do it at the string line stage, before any gravel is delivered, because it is a two minute job then and a two day job afterwards.
What this calculator assumes
- The joint default is 1/16 of an inch because concrete pavers are cast with spacer nubs on the sides and that is the joint you get when they are set tight. A hand set joint at 1/8 or wider takes noticeably more polymeric sand, so type the joint you are actually laying.
- Waste is 5 percent for a running bond laid square to the edges, 10 for most patios, and 15 or more for herringbone or a circle kit, because every angled cut throws away most of a paver.
- Base gravel is quoted compacted. Crushed stone loses about a fifth of its loose volume under a plate compactor, so the order line adds 20 percent back.
- Four inches of compacted base suits a foot traffic patio on good soil. Six is the common default, and eight to twelve is driveway and heavy clay territory.
- Polymeric sand is the volume of the joints at the full thickness of the paver, at about 100 pounds per cubic foot.
- Weights use 2,800 lb per cubic yard for crushed stone and 2,700 for bedding sand.
Questions people ask
How many pavers for a 15x15 patio?
1,089 pavers at 4 by 8 in over 225 sq ft, including a ten percent waste allowance.
How much gravel for a 15x15 patio?
5 cu yd ordered, which weighs about 7 tons. That is a 6 in compacted base with twenty percent added for compaction loss.
How do I check a patio is square?
Measure both diagonals corner to corner and adjust until they are equal. On a 15 by 15 each diagonal is a shade over 21 ft 2 in. Check the sides too, since equal diagonals on unequal sides is a rectangle.
The paver calculator takes any dimensions you like and hands back the same list.