Patio cost estimate
40x40 Concrete Patio Cost
A 40 ft × 40 ft concrete patio is 1600 square feet. At a standard 4-inch thickness it needs about 21.73 cubic yards of concrete (with 10 % waste) and costs roughly $9,600 – $19,200 installed with a plain broom finish.
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Material & Cost Breakdown
| Metric | Value | Notes |
|---|---|---|
| Square footage | 1600 sq ft | 40 ft × 40 ft |
| Thickness | 4 in | Standard residential |
| Concrete volume | 19.75 yd³ | Before waste |
| Order volume (10% waste) | 21.73 yd³ | Ready-mix ordering target |
| 80 lb bags needed | 978 bags | Including waste |
| 60 lb bags needed | 1304 bags | Including waste |
| Ready-mix material cost | $2,825 – $3,585 | ~$130–$165 per yard delivered |
| Installed cost (broom) | $9,600 – $19,200 | $6–$12 per sq ft |
* Installed cost assumes a standard broom finish, easy site access, and a prepared sub-base. Decorative finishes, tear-out, poor soil, or pump-truck access will move the price higher.
How We Calculated It
- Area: 40 ft × 40 ft = 1600 sq ft
- Volume: 1600 sq ft × (4 in ÷ 12) = 533.3 cu ft ÷ 27 = 19.75 yd³
- With 10% waste: 19.75 × 1.10 = 21.73 yd³
- Bags (80 lb): 21.73 × 27 ÷ 0.60 cu ft/bag ≈ 978 bags
FAQs
How much does a 40x40 concrete patio cost?
A 40x40 (1600 sq ft) concrete patio costs roughly $9,600 to $19,200 installed with a broom finish in 2026. Decorative finishes, tear-out, and site prep can raise the price.
How many cubic yards for a 40x40 patio?
At 4 inches thick, a 40x40 patio needs about 19.75 cubic yards before waste and 21.73 yards after a 10% ordering allowance.
How many 80 lb bags for a 40x40 patio?
You would need about 978 bags of 80 lb concrete (including 10% waste). Above roughly one cubic yard, ready-mix is usually cheaper and easier than bags.
Planning Your 40x40 Pour
When preparing to pour a 40 ft × 40 ft concrete patio, proper planning is essential to keep your project on budget. The dimensions directly determine the total square footage, which in turn dictates the amount of labor, forming materials, and finishing time required.
The thickness is equally important. While 4 inches is standard for this type of patio, increasing the thickness by just one inch will significantly increase the total cubic yards of concrete needed. Always ensure your sub-base is properly compacted and leveled; an uneven base can lead to thick spots that consume more concrete than your initial estimate predicted. Lastly, ordering with a 10% waste margin is a standard industry practice to account for minor spills, uneven ground, and the small amount of concrete left inside the delivery truck.