Concrete Pool Deck Calculator
Estimate concrete for a poured pool deck, accounting for the pool cutout.
Concrete needed
7.11 yd³
for 688 ft² of deck around the pool
- Net deck area
- 688 ft²
- Cubic feet
- 192 ft³
- Cubic yards
- 7.11 yd³
- Bags equivalent
- 320 bags
Short answer
A 40×30 foot deck area around a 32×16 foot pool, poured 4 inches thick, needs roughly 7 cubic yards of concrete once the pool footprint is subtracted. Anything beyond about 1 cubic yard is almost always more practical and cheaper to order from a ready-mix truck than to mix from bags.
Pool deck thickness by use
| Deck use | Thickness | Notes |
|---|---|---|
| Standard walking deck | 4 in | Typical for most residential pool decks |
| Paver or hardscape base | 4–5 in | Slightly thicker for a stable base under pavers |
| Deck with equipment access or heavier loads | 5–6 in | Reinforce with wire mesh or rebar |
How to plan and pour a pool deck
- Measure the full deck area you want to cover, including the space the pool itself occupies.
- Check the box above and enter the pool’s footprint to subtract it from the total area, since the pool itself doesn’t need deck concrete.
- Pick a thickness based on expected foot traffic and whether pavers or heavier equipment will sit on the deck.
- For anything over roughly 1 cubic yard, order ready-mix concrete by the truck instead of mixing dozens of bags by hand.
- Slope the deck slightly away from the pool (about 1/4 inch per foot) so water drains away instead of back into the pool.
- Use control joints every 8 to 12 feet to manage cracking from temperature and moisture changes.
Worked example
- Deck area (gross)
- 40 × 30 = 1,200 ft²
- Pool footprint
- 32 × 16 = 512 ft²
- Net area × thickness
- (1,200 – 512) × 4/12 = 229.3 ft³, plus 10% waste = 252.3 ft³ = 9.35 yd³
Common mistakes
- Forgetting to subtract the pool’s own footprint, which significantly overestimates the concrete needed.
- Pouring the deck flat instead of sloped away from the pool, letting runoff and splash water drain back in.
- Trying to mix a large pool deck from bags instead of ordering ready-mix, which is far slower and more expensive per yard.
- Skipping control joints, leading to random, unsightly cracking as the large slab cures and moves.
Assumptions
- Standard premix concrete at roughly 150 lb per cubic foot for the bag-equivalent reference figure.
- Bag yields follow manufacturer averages: 80 lb = 0.60 ft³, 60 lb = 0.45 ft³, 50 lb = 0.375 ft³, 40 lb = 0.30 ft³.
- Pool footprint is treated as a simple rectangle; irregular or curved pool shapes should be measured more precisely.
- Does not include rebar, wire mesh, control joint tooling, or coping and finish materials.
Frequently asked questions
How thick should a concrete pool deck be?
4 inches is standard for most residential pool decks under normal foot traffic. Areas that support paver bases, heavy furniture, or equipment access are often poured 5 to 6 inches thick with reinforcement.
Do I need to subtract the pool itself from the deck area?
Yes. The pool footprint doesn’t get deck concrete, so subtracting it from the total area gives a much more accurate material estimate, especially on larger decks.
Should I use bags or a ready-mix truck for a pool deck?
For anything more than about 1 cubic yard, a ready-mix truck is almost always faster and cheaper per yard than mixing dozens of bags by hand. Most pool decks fall well above that threshold.