Paver Sand Calculator
Bedding sand yardage and bag count for any patio
What is paver sand calculator?
A paver sand calculator answers a deceptively narrow question: how much bedding sand do I need under this patio at the standard 1-inch depth. Unlike most other bulk materials, paver sand has one correct depth for one job — and getting that depth right matters more than getting the volume exactly right.
The default density is 105 lb/ft³, which is typical for sharp (concrete) bedding sand. Bag sand at home centers averages 100 lb/ft³ and bulk concrete sand from a quarry runs 105-110 lb/ft³ depending on moisture. The volume calculation doesn’t change; only the weight readout does.
Why the depth is locked at 1 inch. A bedding sand layer thicker than 1 inch causes pavers to heave with seasonal frost and to tilt under heavier traffic — both because sand displaces under load and because thick sand layers retain moisture that freezes and expands in winter. A layer thinner than 1 inch leaves pavers rocking on the compacted base below, since real-world bases aren’t perfectly flat. Industry standard for residential and most commercial work is 1 inch, screeded flat with a guide rail before laying pavers. Don’t deviate.
Bulk vs bagged: bagged sharp sand runs $5-8 per 50-lb bag, with each bag covering about 6 square feet at 1-inch depth. For a typical 12x16 ft patio (192 ft²), that’s ~32 bags — borderline territory. Past about 200 ft² (35-40 bags), bulk paver/concrete sand from a landscape supply yard is dramatically cheaper at $30-45 per cubic yard delivered, and saves the lifting. Below that, bags are easier and the bag-grade sand is reliably clean.
The 10% waste factor default covers spread loss and the scoop-too-much at the wheelbarrow end. The bedding layer is buried under pavers, so most sand goes exactly where it’s placed and stays there — 10% is usually plenty. Order separately for joint fill: polymeric sand goes between the pavers after they’re set, and that’s a different product with different coverage math.
Use sharp (coarse, concrete) sand only — angular grains that lock together. Never use play sand, mason’s sand, or beach sand; their rounded grains shift under load and pavers heave with the first frost.
When to use a paver sand calculator
- Paver patio bedding layer — 1 inch of sharp sand over the compacted base — never thicker. The calculator outputs both yards and 50-lb bag count for the order.
- Walkway bedding — Same 1-inch bedding depth for paver walkways. Narrow runs like walkways are bag-friendly even when the area is large.
- Driveway pavers — 1 inch of bedding sand under driveway pavers, on top of 4-6 inches of compacted base. Ordering by the yard wins past about 200 ft^2.
How to use the Paver Sand Calculator
- Measure the area — Multiply patio length by width. For walkways, length by walkway width. Subtract any planter cut-outs or fixed-feature footprints.
- Stick to 1 inch of bedding — 1 inch is the textbook bedding depth — never more. Too much sand causes pavers to heave with seasonal frost; too little leaves them rocking on the base. The calculator's depth is preset to 1 in for this reason.
- Read the bag count — Output shows 50-lb bags at about 0.5 cu ft per bag. Round up — partial bags don't store well, and you'll want extra for joint fill anyway.
- Apply waste factor — 10% covers spread loss and the inevitable scoop-too-much. The bedding layer is buried, so most sand goes exactly where it's placed; 10% is usually plenty.
Worked examples
12 ft x 16 ft patio at 1 in bedding
Input: 12 ft x 16 ft x 1 in depth
Output: 0.65 cu yd / 35 of 50-lb bags (with 10% waste)Walkway, 3 ft x 30 ft at 1 in
Input: 3 ft x 30 ft x 1 in depth
Output: 0.31 cu yd / 16 of 50-lb bagsUse sharp (concrete/coarse) sand — never play sand or beach sand.
Driveway pavers, 12 ft x 30 ft at 1 in
Input: 12 ft x 30 ft x 1 in depth
Output: 1.22 cu yd / 65 of 50-lb bags