Polymeric Sand Calculator
The coverage printed on a bag of polymeric sand assumes one paver size and one joint width. This calculator works from your actual pavers: it measures the total joint length per square foot, multiplies by joint width and depth, and tells you how many 50 lb bags to buy for your patio.
What you'll need
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Aqua Joe Premium Pool & Spa Filter Sand, 50 Lb Bag, FLTSAND50
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Hourleey 30" Pressure Washer Surface Cleaner with Dual Handles, Stainless Steel Surface Cleaner with 4 Wheels for Driveways, Pathway, Sidewalks, Patios, Decks, 4500 PSI with 3/8" Quick Connector Kit
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BlumeTrec 8"x8" Steel Tamper with 48" Handle, Heavy Duty Hand Compactor Tool for Leveling Soil, Gravel, Sand, Asphalt, Ground, Paver, Driveway, Garden, Yard and Blacktop Repair
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Palmetto Pool Filter Sand for Swimming Pools, 50 Lbs, Natural Silica
$29.99
View on Amazon →Prices as of Sep 25, 2026, 6:18 PM UTC. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
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Frequently asked questions
- How much area does a bag of polymeric sand cover?
- A 50 lb bag covers about 60 to 75 square feet of 4 by 8 inch pavers with tight 1/8 inch joints, but only 25 to 40 square feet with 1/4 inch joints, and far less with the wide joints of tumbled or natural stone. Joint width is the biggest variable.
- How deep does polymeric sand need to be?
- It should fill the joint to within 1/8 inch of the top of the paver, and the joint must be at least 1.5 inches deep for the binder to hold. Shallow joints, such as over a mortar bed, need a different product.
- Can you put polymeric sand over old sand?
- Only after you remove the old joint sand to at least 1 inch deep, ideally the full paver depth. A thin skin of polymeric sand over loose sand cracks and lifts within a season.
- How long before I can walk on polymeric sand?
- Most products take foot traffic after 24 hours and vehicles after 48 to 72 hours. Rain in the first few hours after misting can wash the binder out, so check the forecast before you start.
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