Calculator · Central Arkansas
Concrete calculator: how many yards do you need?
Enter the dimensions, get cubic yards with a waste allowance built in, and send the number straight to a quote. We mix on site and meter what is discharged, so you order for the job, not the truck.
Anything from 1 to 5 yards is a short load. We deliver it without a full-truck minimum.
Common pours, already worked out
| Job | Dimensions | Yards (exact) | Order (with 10%) |
|---|---|---|---|
| 10 × 10 pad | 10 × 10 ft, 4 in | 1.23 | 1.50 |
| 12 × 12 shed pad | 12 × 12 ft, 4 in | 1.78 | 2.00 |
| Single-car parking pad | 10 × 20 ft, 4 in | 2.47 | 2.75 |
| 16 × 20 patio | 16 × 20 ft, 4 in | 3.95 | 4.50 |
| 20 × 20 slab | 20 × 20 ft, 4 in | 4.94 | 5.50 |
| 24 × 24 garage | 24 × 24 ft, 4 in | 7.11 | 8.00 |
| 24 × 30 shop floor | 24 × 30 ft, 5 in | 11.11 | 12.25 |
| 30 × 40 barn slab | 30 × 40 ft, 4 in | 14.81 | 16.50 |
| Equipment pad | 10 × 10 ft, 6 in | 1.85 | 2.25 |
| Footing around a 24 × 24 building | 96 ft, 16 × 8 in | 3.16 | 3.50 |
| Fence posts | 12 holes, 12 in × 36 in | 1.05 | 1.25 |
| Deck piers | 8 holes, 18 in × 36 in | 1.57 | 1.75 |
How to measure so the number is right
- Measure the inside of the forms, not the outside of the lumber.
- Thickness is in inches. A 4-inch slab is 0.33 feet; the calculator does that conversion for you.
- Slabs on grade are rarely a perfect 4 inches. Uneven subgrade, low spots and spillage are why we add 5–10%.
- For footings, measure the total trench length and use the true width and depth of the dig, not the plan dimension.
- For post holes, use the auger diameter. Concrete fills the hole around the post; if the posts are large, subtract their volume or just keep the allowance.
- Round up to the next quarter yard. Running short in the middle of a pour costs more than a little extra concrete.
Not sure which mix to order? The concrete mix guide covers PSI, fiber, air entrainment and when each one matters.
Bags or delivered concrete?
An 80-lb bag yields about 0.6 cubic feet, so a 10 × 10 pad at 4 inches (33 cubic feet) is roughly 56 bags, mixed one at a time. Above about half a yard, delivered concrete saves hauling the bags, renting a mixer and mixing by hand. Because we mix on site and meter the discharge, there is no full-truck minimum: you pay only for what is poured.
Rather send us the numbers? Text the length, width, thickness and address: Text (501) 722-2246 Español (501) 260-7391
Common questions about how much concrete to order
How many yards of concrete do I need for a 10 × 10 slab?
A 10 × 10 ft slab at 4 inches thick is 33.3 cubic feet, or 1.23 cubic yards (10 × 10 × 0.33 ÷ 27). With a 10% margin, order about 1½ yards. The calculator above does the math for any size.
How thick should my slab be?
4 inches is the usual thickness for sidewalks, patios and shed bases. Driveways and garages with heavy vehicles, shop floors with equipment and machinery pads usually go 5 or 6 inches. Footings follow the plans or what your city or county inspector requires.
How many bags of concrete make a yard?
An 80-lb bag yields about 0.6 cubic feet, so one cubic yard (27 cubic feet) is about 45 bags. Above half a yard, concrete mixed at your site usually saves hours of hand mixing.
Can I order less than a yard?
Yes. No full-truck minimum. Pay only for what you pour. We deliver from ½ yard; a small-load charge and travel charges may apply, and they are explained in the quote before you commit.
What if I measured too much?
We mix the concrete at your site and meter what is discharged, so you pay for what you pour, not a full truck. Still keep a 5–10% margin: running short halfway through a pour causes more trouble than a little extra concrete.
Can I text you my measurements?
Yes. Text the length, width, thickness and the job address to (501) 722-2246 (English) or (501) 260-7391 (Spanish). Someone from our team will call or text you with the delivered price.
Proof
Rated 5.0 on Google by the people we pour for.
Contractors and homeowners across Saline and Pulaski County rate us 5.0 stars. Read the reviews on Google.