10 × 10 ft slab: the short answer
Poured 4 inches thick (with 10% waste), a 10 × 10 ft slab needs about 36.7 cubic feet of concrete — roughly 62 × 80 lb bags, or about 1.36 cubic yards of ready-mix.
Slab size
Concrete for a 10 × 10 ft slab
A 10 × 10 ft slab poured 4 inches thick needs about 36.7 cubic feet of concrete — roughly 62 × 80 lb bags, or 1.36 cubic yards of ready-mix (includes 10% waste). Change the thickness, bag size, or shape below.
Concrete needed
—Enter dimensions to estimate concrete.
| Bags (incl. waste) | — |
|---|---|
| Ready-mix (cubic yards) | — |
| Volume (cubic feet) | — |
| Estimated cost | — |
Shopping list
Run the calculator to prepare a list.
Estimate only.
Includes your waste allowance (concrete can't be reused). Bag yields are typical for standard
mixes; confirm on the bag. Past about 1 cubic yard, ready-mix delivery is usually cheaper and
easier than mixing bags.
Before you pour
Concrete can't be reused once mixed, so the 10% allowance matters. For anything structural, confirm thickness and reinforcement with your local code. Adjust thickness and bag size in the calculator for your exact pour.
Standard volume math at 4″ with 10% waste; 80 lb bag ≈ 0.6 cu ft. Estimates only.
What a 10 × 10 ft slab is usually used for
A 10 × 10 ft slab is a common size for a small shed base, a patio, or a compact workshop floor. At 100 sq ft and 4 inches thick it takes about 1.2 cubic yards of concrete, which is past the practical bag limit for most people and usually worth a ready-mix delivery.
How to decide
At roughly 1.2 cubic yards, decide between about 67 bags of 80 lb mix and a ready-mix truck. Ready-mix is usually cheaper and guarantees a continuous pour, but it needs truck access and a crew ready to place it. The calculator's bag count shows what a hand-mix route would take so you can compare honestly.
Checks before you pour
- Confirm truck access and the shortest route to the pour location.
- Check the slab's purpose and local requirements for thickness and reinforcement.
- Have forms, subgrade, and finishing tools ready before the truck arrives.
FAQ
How much concrete for a 10 × 10 ft slab?
At 4 inches thick with 10% waste, a 10 × 10 ft slab needs about 36.7 cubic feet — roughly 62 × 80 lb bags (or 82 × 60 lb), or 1.36 cubic yards of ready-mix.
Bags or ready-mix for a 10 × 10 ft slab?
At about 1.36 cubic yards, this slab is past the point where bags make sense — 62 bags is a lot of mixing. Ready-mix delivery is usually cheaper and lets you pour it all at once.
Sources & verification
Source links and page assumptions reviewed .
- QUIKRETE: quantity calculator — Manufacturer quantity calculator and bag-yield guidance for concrete mixes.
- QUIKRETE: concrete mix data sheet — States an 80 lb bag of concrete mix yields about 0.6 cu ft at recommended consistency.
Estimate only, based on standard volume math at 4″ thickness with 10% waste. Confirm bag yield on the package and consult a pro for structural work.