Paver Sand Calculator for Bedding and Joints

Sand is the one paver material the weather has an opinion about. On the Northern Neck and across the tidal rivers, a front walk laid in late summer is working against tropical rain and against ground that stays damp for days once it is wet, and joint sand that is swept in before a downpour is joint sand you sweep in twice. This paver sand calculator sizes the bedding course, and the job below runs a 42 ft front walk through in the order it actually happens.

Reading the forecast before anything is ordered

Bedding sand screeds cleanly when it is damp-to-dry and not at all when it is soaked, so the pile wants a tarp over it from the moment it lands. Joint sand needs more than that. Plain sand can go in on any dry morning and be topped up later, but polymeric sand has to be installed into dry joints on a dry surface and then wetted deliberately, and a shower an hour after sweeping can set it where it sits. Two or three clear days is the window to aim for, which in practice means avoiding the late-summer and autumn storm stretch on the coast.

Measuring the walk, then the strip it sits on

The walk is 42 ft long and 4 ft wide, so 168 square feet of paving. The bedding course does not stop at the pavers: it covers the same footprint as the base, which runs 6 inches past every open edge to carry the edge restraint. That makes it 43 ft by 5 ft, or 215 square feet. Enter that, not the 168.

Use rectangle with length and width in feet for a straight run, circle with a diameter for a round landing, and multiple areas for up to five entries where a walk turns a corner into a patio.

Sizing the inch on the form above

The bedding layer is exactly 1 inch, and that figure does not flex. Enter 1 in depth (inches), which accepts anything between 0.25 and 24, and pick the sand on the material select so the weight conversion is right.

The arithmetic: 215 square feet at 1 inch is 215 divided by 12, or 17.9 cubic feet. Divided by 27 that is 0.66 of a cubic yard. Coarse sand is published here at about 2,700 lb a cubic yard, which is 1.35 tons, so 0.66 x 1.35 gives 0.9 of a ton. Order a ton and let the remainder go into the joints.

Put the extra depth in the stone, never here. A bed screeded at 2 inches instead of 1 gives the pavers something to rock on, and no amount of compaction afterwards fixes it.

Counting joint bags off the same walk

Joints are bought by the bag, not the ton, and the two numbers are nothing like each other. Across 168 square feet with standard 1/8 to 1/4 inch joints, one 50 lb bag covers 40 to 75 square feet, which puts this walk at 3 to 5 bags. Joints of 3/8 inch and wider roughly halve that coverage, so the same walk would take 5 to 9. Check the coverage chart on whichever bag you buy and round up: joints settle a quarter inch after the first wash-in and want topping. The bags are a local purchase from a home center or a paver dealer; what this site sells in bulk is the bedding inch.

Screeding the inch and setting the pavers into it

Lay two rails on the compacted base, pull the sand off them with a screed board, then fill the rail channels as you go. Leave the bed uncompacted and stay off it; the plate compactor comes over the finished pavers at the end and beds them into the sand. Work outward from the pavers already laid, standing on the finished section.

Use coarse angular sand throughout the bedding. Mason Sand and Washed Sand both suit it, and both sit at about 2,700 lb a cubic yard so the tonnage holds either way. Play sand does not: rounded grains roll under load. Screenings make a firmer bed with less tolerance for fine leveling, and whichever you choose, use one bedding material across the whole job.

Sweeping and wetting the joints before the weather turns

Sweep the joints full on a dry day, run the compactor, top them up and mist. Keep the leaf blower on a low setting near filled joints. Plain mason sand wants replenishing every season or two, and on a walk that sheds thunderstorm runoff off slow-draining clay, repeated washout usually points at the slope or a downspout rather than the sand.

What the three figures on the panel are telling you

The panel returns cubic yards, tons and cubic feet at once, and on sand it is worth reading all three. Cubic yards is the pile: a single yard of bedding sand spread at 1 inch covers about 320 square feet, which is more walk than most gardens hold. Tons is the order unit, and it is a small number here, so check it against the yardage before you buy. Cubic feet is the honest figure for a job this size, since 17.9 cubic feet is roughly what you will screed off the rails. Email my quote keeps the set.

One note on which tool to reach for. Use this page for a paver build, where the bedding is a fixed inch and the joints are counted in bags. Use the sand calculator for bulk sand at any depth you choose, such as leveling under a slab or filling a sandbox, where nothing about the layer is fixed at an inch. When the tonnage is settled, set a quantity and a date on the product page, and how the drop is arranged follows from the ZIP you enter at checkout.

Common questions

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