Stop guessing how much concrete to order. Enter your slab, footing, or driveway dimensions and get cubic yards, bags, and cost in seconds — accurate enough to call your supplier with confidence.
Ordering concrete is unforgiving. Order too little and your pour stalls mid-job with a visible seam; order too much and you pay for waste sitting in the truck. A concrete yard calculator removes the guesswork by converting your slab, footing, or driveway dimensions into the one number that matters to your supplier: cubic yards.
Square footage tells a flooring contractor what they need. Concrete is sold by volume — length × width × depth — which is why thickness is the variable people forget and the one that wrecks an estimate.
Ready-mix trucks and most batching plants quote and deliver in cubic yards. Our concrete cubic yard calculator converts feet, inches, meters, or centimeters into yards automatically, so you order in the unit your supplier expects.
Small jobs — a mailbox footing, a fence post, a stepping stone — rarely justify a truck. Our concrete bag calculator estimates how many 50 lb, 60 lb, or 80 lb bags you'd need instead.
A few seconds with the right inputs can save hundreds of dollars and an entire afternoon of re-ordering concrete.
Calculates exact cubic yards needed so you order the right amount the first time.
Add your supplier's price per yard to see a real budget number before you call.
Avoid paying for excess concrete or scrambling to fill a short pour.
Works in feet, inches, yards, meters, or centimeters, for slabs, footings, and round pours.
Four inputs are all it takes to go from rough idea to an order-ready cubic yard figure.
Pick rectangular slab for driveways, patios, and footings, or round for circular pads and post footings.
Type the length and width (or diameter), and select the unit you measured in — feet, inches, yards, meters, or centimeters.
Add your slab thickness. Most patios use 4 inches; driveways typically use 5-6 inches.
Instantly see cubic yards, cubic feet, cubic meters, weight, bag counts, and total cost if you entered a price.
Switch freely between feet, inches, yards, meters, and centimeters without converting anything by hand.
See 50 lb, 60 lb, and 80 lb bag totals side by side for small DIY pours.
Enter your local price per cubic yard for an instant total project cost.
Clear inline errors catch typos and missing fields before you act on the numbers.
Copy your result to paste into a text or email, or print a clean summary for the job site.
Built for a phone in a truck cab as much as a desktop in the office.
Built on the same length × width × depth ÷ 27 formula contractors use, with industry-standard bag yields baked in.
No account, no email gate. Open the page, enter your numbers, and get your answer.
Bag yields and weight estimates are clearly labeled so you know exactly what's behind every number.
Order 5–10% extra. Subgrade is rarely perfectly flat, and spillage during the pour is normal.
Double-check your depth unit. Mixing up inches and feet for thickness is the single most common estimating error.
Round up bag counts. Partial bags aren't usable, so always round to the next full bag.
Measure twice on irregular slabs. Break L-shaped or curved areas into simple rectangles and circles, then add the volumes together.
Confirm your supplier's minimum order. Many ready-mix plants have a minimum yardage per truck; small jobs may be cheaper with bagged concrete.
Multiply length × width × depth (in feet) to get cubic feet, then divide by 27 for cubic yards. Our concrete yard calculator does this instantly once you enter your dimensions and unit.
Roughly 45 bags, since each 80 lb bag yields about 0.6 cubic feet of mixed concrete.
Patios and walkways commonly use 4 inches; driveways and slabs that bear vehicle loads typically use 5–6 inches.
Yes. Switch the calculator to "Round Slab / Footing" and enter the diameter and depth — it uses the circle-area formula automatically.
Enter your local price per cubic yard in the optional field, and the calculator adds an estimated total project cost to your results.
"Used it to order a patio pour. Came within half a yard of what the truck actually delivered."
"The bag breakdown saved me a wasted trip to the hardware store for a small footing."
"Quick, no clutter, and the unit switching is exactly what I needed for a metric job spec."
Occasional, practical advice — no spam.