🧱Polymeric Sand Calculator
Find how many bags of polymeric sand you need to fill paver joints.
Your patio
You'll need about
5 bags
2.45 cu ft of joint fill · each bag covers about 45 sq ft with these joints (incl. 10% waste)
bags
5
cu ft
2.45
sq ft per bag
45
joint in / sq ft
51.3
🛒 Shopping list
- Polymeric sand (50 lb bags)5 bags
Wide joints and small pavers drink far more sand — check the coverage chart on your bag and adjust the volume per bag if needed.
How it works
Joint length per sq ft = 144 × (1 ÷ (paver length + joint) + 1 ÷ (paver width + joint)) inches. Joint volume = joint length × joint width × joint depth. Bags = total volume (plus waste) ÷ volume per bag (about 0.5 cu ft for a 50 lb bag, editable).
Worked example
200 sq ft of 4 × 8 in pavers with ¼ in joints, 1½ in deep: about 19.3 cu in per sq ft, 2.45 cu ft with 10% waste, so 5 bags. Each bag covers about 45 sq ft with these joints.
Questions people ask
Small pavers and wide joints have far more joint space to fill.
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Last updated October 8, 2026. These results are friendly estimates to help you plan — always double-check before buying or making big decisions.