Pool Deck Gravel Calculator

What the pool deck gravel calculator computes

Pool deck gravel applications surround inground or above-ground pools with a decorative, walkable surface that handles water exposure and barefoot traffic. The calculator computes cubic yards needed for a specified pool deck area and finished depth. Pool deck applications typically run 2 to 3 inches of surface gravel over a 2 to 3 inch compacted base.

A typical 16 by 32 foot inground pool with a 6 foot wide gravel deck surround needs about 5 to 7 tons of surface gravel plus 5 to 7 tons of Paver Base or Crusher Run for the base course. Total aggregate tonnage for the deck install is 10 to 14 tons, fitting one tandem-axle delivery.

Pool deck gravel options

Three gravel types dominate pool deck installations. River Rock (1 to 3 inch rounded stones in mixed natural colors) is the premium pool deck pick. The rounded shape is comfortable underfoot, the natural earth tones complement most pool design styles, and the larger size resists displacement from foot traffic and pool maintenance carts.

Pea Gravel (3/8 inch rounded) is the budget alternative. It is softer underfoot than River Rock but more prone to migration onto adjacent surfaces (the pool, the lawn, into shoes). Use Pea Gravel for low-traffic pool decks and as accent zones around landscape features adjacent to the pool.

Decomposed Granite (DG) is the modern contemporary choice. The fines bind under compaction to create a near-paved walking surface in golden tan tones. DG is the best of both worlds for pool decks: walkable, intentional-looking, low-migration. The downside is slightly higher cost ($55 to $80 per ton).

Why pool deck installs differ from regular gravel

Pool decks face four design constraints that regular gravel applications do not. First, water exposure. Pool splash, hose-down maintenance, and seasonal rain all add up to a wet environment most of the year. The base must drain freely; pool decks are NOT the place for fines-rich materials like Crusher Run as a finish.

Second, barefoot traffic. Rough crushed angular materials (#57 Crushed Stone, #4 Crushed Stone) are uncomfortable on bare feet. Use rounded gravels (Pea Gravel, River Rock) or wet-compacted DG that produces a smooth surface.

Third, chlorine and pool chemicals. Repeated chlorine exposure breaks down some aggregates over years. Granite-based materials (Decomposed Granite, certain crushed stones) hold up better than limestone-based products. Ask the supplier about the parent rock for the aggregate you order.

Fourth, edge integration with the pool coping. The gravel deck typically terminates at a paver or stone coping that frames the pool edge. The coping must be installed first; the deck base and finish gravel slope away from the coping at 1 to 2 percent for drainage.

Install sequence for a pool deck

The install sequence is: excavate the deck area to 4 to 6 inches below the planned finished grade, set perimeter edging (steel landscape edging or stone borders), place 2 to 3 inches of Paver Base or Crusher Run compacted in two lifts, lay 4 to 6 ounce filter fabric over the base, place 2 to 3 inches of surface gravel (River Rock, Pea Gravel, or DG), rake smooth.

For DG installs specifically, wet-compact the surface after spreading. The fines bind only when wet and compacted; dry-spread DG stays loose. A garden hose mist plus a couple of passes with a plate compactor produces the final stable surface.

Grade matters around the pool. The deck surface must slope AWAY from the pool at 1 to 2 percent to prevent rainwater and pool chemicals from flowing back into the pool. Achieve this by setting the base course at the right elevations before placing the finish gravel; trying to correct the slope by varying the finish course thickness produces an unstable surface.

Pricing and maintenance for pool decks

River Rock at $55 to $95 per ton delivered is the premium pool deck material. Pea Gravel at $48 to $72 is mid-range. Decomposed Granite at $55 to $80 is also mid-range with stronger walkability. For a typical 12 by 16 foot pool deck area (192 square feet) at 2.5 inch finish depth, the surface gravel cost runs $80 to $200 plus another $80 to $150 for the base course.

Same-day delivery before 11 AM with 1 to 2 day lead times. Pool deck projects often combine multiple materials in one delivery: River Rock for the finish surface, Paver Base for the base course, sometimes additional Pea Gravel for accent zones. Order everything together for one delivery fee.

Maintenance is annual or biannual. Each spring, top up the finish gravel by 1/2 to 1 ton (about $50 to $100 in materials) to restore depth. Rake smooth, refresh the edging if any sections have migrated. Pool decks with high foot traffic may need top-up twice a year. Plan the maintenance for early in the pool season before guests arrive.

Drainage to prevent pool chemistry contamination

Pool deck drainage matters for two reasons. First, draining rainwater and pool splash away from the pool prevents chlorine and pool chemicals from contaminating the surrounding lawn and beds. Second, draining toward the pool would carry leaves, dirt, and contaminants into the pool, increasing maintenance cost and reducing water quality.

The standard deck drainage approach is a 1 to 2 percent slope away from the pool coping, sheet-flowing across the gravel deck to a perimeter drain or directly to surrounding soil. For larger pool decks (over 200 square feet), add a perimeter strip drain (a linear trench drain with a grate at grade) that collects water at the deck edge and pipes it to a daylight outlet or stormwater system.

Pool chemical considerations matter for plantings adjacent to the deck. Chlorine-sensitive plants (azaleas, gardenias, many roses) suffer if pool splash drains onto their root zones. Plant chlorine-tolerant species (junipers, ornamental grasses, sedums) within 5 feet of the pool deck edge. Or design the deck drainage to route water at least 5 feet beyond the planted areas before it reaches soil.

For saltwater pools, the drainage concern is salt rather than chlorine. Salt-tolerant plantings (sea oats, beach grass, plumbago) handle the runoff; salt-sensitive species do not. Saltwater pool decks are also harder on metal edging and fasteners; use marine-grade stainless or aluminum hardware throughout.

For pools surrounded by densely planted landscape, a perimeter buffer strip of bare ground or hardscape between the pool deck and the planted beds acts as a chemical containment zone. The strip is typically 2 to 4 feet wide, covered in stone or pavers, and is not planted. Spilled pool chemicals or chlorinated splash water lands and dries on the buffer strip without reaching plant root zones.