How Many Pavers for a 20x20 Patio?

A 20 × 20 ft patio (400 sq ft) takes 1980 pavers in the standard 4 × 8 in size, including 10% for cuts. Underneath you need about 8 tons of base gravel for a 4 inch base and 67 bags (50 lb) of bedding sand.

Change any number below to match your project. The paver calculator works for any size.

Area

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How it's worked out

  1. Area: 20 × 20 = 400 sq ft
  2. Pavers: 400 × 4.5 pavers per sq ft = 1,800, plus 10% = 1980
  3. Base: 400 × 4 in ÷ 12 ÷ 27 × 1.15 for compaction = 5.68 yd³ ≈ 8 tons
  4. Sand: 400 × 1 in ÷ 12 = 33.3 cu ft = 67 bags

20x20 patio with other paver sizes

Paver sizePavers with 10% extra
4 × 8 in1980
6 × 6 in1760
6 × 9 in1174
12 × 12 in440
16 × 16 in248
12 × 24 in220

Herringbone and curved designs waste more, so allow 15% for those. You'll also need polymeric joint sand and edge restraint around the sides that aren't against a wall.

Other common sizes