How to Calculate Sand Volume and Weight
Calculate volume by multiplying length times width times depth (all in the same units). For feet and inches, convert depth to feet first by dividing by 12. A 12x12 area with 1 inch of sand equals 12 x 12 x (1/12) = 12 cubic feet. Convert to cubic yards by dividing by 27: 12 / 27 = 0.44 cubic yards. Multiply by the density factor (1.5 tons per cubic yard for most sand) to get tonnage: 0.44 x 1.5 = 0.67 tons. Most bulk suppliers have a minimum delivery of 1-2 tons, so small projects often need to use bagged sand.
For paver patios, the bedding sand layer should be exactly 1 inch thick after screeding. The base layer underneath (usually 4-6 inches of compacted gravel) provides the structural support. Do not use more than 1.5 inches of bedding sand, as thicker layers cause pavers to shift and settle unevenly. If you need sand for a gravel driveway base, that is a different application requiring compacted structural fill rather than loose bedding sand.
Sand Types and Their Applications
Concrete sand (also called coarse sand or builder's sand) has particles ranging from 0.075 to 4.75mm. It is angular, drains well, and compacts into a stable base. This is the standard for paver bedding, under-slab fill, and pipe bedding. Mason sand is finer and smoother, used primarily for mixing mortar and plaster. Play sand is even finer, washed and screened to remove silica dust, and used in sandboxes and playgrounds. Fill sand is the cheapest grade, containing some clay and organic material, suitable only for general fill where compaction and drainage are not critical.
For specialty applications, volleyball court sand is washed and rounded with specific particle size distribution ($30-60/ton). Pool filter sand is graded to 0.45-0.55mm and costs $10-20 per 50-lb bag. Frac sand used in oil and gas extraction is highly processed silica sand. For most residential projects, concrete sand at $15-40 per ton delivered is the right choice. When planning a complete outdoor project, our paver calculator works alongside this sand calculator for a full material breakdown.
Sand Delivery vs Bagged Sand
Bulk sand delivered by dump truck costs $15-40 per ton plus a delivery fee of $50-100. Most suppliers have a 1-ton minimum for delivery. A single axle dump truck carries 5-10 tons, and a tandem axle carries 15-20 tons. For a typical paver patio needing 2-3 tons, bulk delivery at $80-150 total is far cheaper than bagged sand. Bagged sand at home centers runs $4-8 per 50-lb bag, which equals $160-320 per ton, roughly 4-8 times the bulk price. Bags are only practical for very small repairs or when you cannot get a delivery truck to the project area.
When ordering bulk sand, specify the type (concrete sand, mason sand, fill sand) and quantity in tons. The supplier will schedule delivery and dump the sand in your driveway or as close to the project as the truck can reach. Have a wheelbarrow and shovel ready to move it to the work area. Spread the sand as soon as possible after delivery since it settles and compacts over time if left in a pile. Cover the pile with a tarp if it will sit for more than a day to prevent rain from washing away the fine particles.
Common Sand Calculation Mistakes
The most common error is using the wrong density factor. Different sand types have different weights per cubic yard: concrete sand is about 1.5 tons/CY, mason sand about 1.4 tons/CY, and wet sand can be 1.7-1.8 tons/CY. Using a generic 1.0 factor (which some online calculators do) underestimates the weight by 33-50%, leading to a short order. Always use 1.5 for dry concrete sand and 1.7 if the sand might be wet from recent rain.
Not accounting for compaction is the second mistake. When sand is compacted (driven over, walked on, or tamped), it settles 10-15%. If you need 4 inches of compacted sand, order enough for 4.5-4.6 inches of loose sand. This compaction factor is separate from the waste factor of 5-10% for spillage and uneven spreading. For paver bedding, compaction is not a concern since the sand is not compacted. But for structural fill under a slab, compaction matters significantly. Use our rebar calculator for reinforcement if the sand base is supporting a structural concrete pour. For a complete patio project estimate, a tile calculator can help budget the finished surface.
Seasonal Sand Projects and Timing
Spring is the busiest season for sand delivery, which means longer lead times and sometimes higher prices from late March through June. If your project is flexible, ordering sand in late winter or early fall can save 10-15% and get faster delivery. Sand can be stored indefinitely if kept dry and covered, so buying ahead is a viable strategy. For winter projects, note that frozen sand is extremely difficult to spread and level — plan to complete sand work before the ground freezes or wait until spring thaw.
Large-scale projects like beach replenishment, athletic field construction, or commercial site preparation often require specialty sand blends delivered in bulk. These projects should be scheduled during dry weather windows since rain saturates the sand and makes spreading and grading impossible. For residential projects like sandbox filling or playground surfacing, a single ton delivered in bags is usually the most convenient option. Check out our fence calculator if your sand project is part of a larger outdoor renovation that includes fencing.