Concrete for a 10x16 slab
A 10 ft by 16 ft footprint is 160 sq ft. At 4 inches thick, the slab volume is about 1.98 cubic yards before waste. With 10% waste, the planning number is about 2.18 cubic yards.
Thickness changes the order
The default thickness on this page is 4 inches. Changing thickness from 4 inches to 6 inches increases concrete volume by 50%, so verify the planned thickness before comparing bagged concrete or ready-mix.
Ready-mix, bags, and site planning
For small slabs, compare bag count, mixing labor, and ready-mix short-load fees. Even small pours still need forms, base prep, and a waste buffer.
Common concrete slab sizes
Cubic yards below are before waste. Add your project waste percentage before ordering.
| Slab size | 4 in thick | 5 in thick | 6 in thick |
|---|---|---|---|
| 10 ft x 10 ft | 1.23 cu yd | 1.54 cu yd | 1.85 cu yd |
| 10 ft x 12 ft | 1.48 cu yd | 1.85 cu yd | 2.22 cu yd |
| 12 ft x 12 ft | 1.78 cu yd | 2.22 cu yd | 2.67 cu yd |
| 20 ft x 20 ft | 4.94 cu yd | 6.17 cu yd | 7.41 cu yd |
| 24 ft x 24 ft | 7.11 cu yd | 8.89 cu yd | 10.67 cu yd |
| 30 ft x 40 ft | 14.81 cu yd | 18.52 cu yd | 22.22 cu yd |
Before you calculate
- Measure the actual formed length and width in feet.
- Enter slab thickness in inches, then handle thickened edges or footings as separate estimates.
- Break irregular slabs into rectangles so the volume calculation stays transparent.
Common mistakes
- Using square feet without converting thickness into volume.
- Missing thickened edges, turndowns, steps, or separate pads.
- Ordering exactly the calculated amount with no allowance for site variation.
Formula
cubic yards = (length * width * (thickness / 12) / 27) * (1 + wastePercent / 100)
Assumptions
- Defaults match a 10x16 slab footprint.
- Thickness is entered in inches.
- Waste covers forms, base variation, and ordering margin.
Example
Estimated concrete needed (cubic yards): 2.17 cubic yards
How to use this calculator
- Enter length in ft.
- Enter width in ft.
- Enter thickness in in.
- Enter waste in %.
- Review the live estimate and compare it with the example result.
- Check the formula, assumptions, product labels, and site conditions before using the 10x16 Concrete Slab Calculator result to plan materials.
Before you buy materials
- Compare cubic yards, cubic feet, and bag counts before deciding between ready-mix and bags.
- Confirm final slab details with plans, product labels, or a qualified professional when accuracy matters.
FAQ
What is the example 10x16 concrete slab cubic-yard result?
Use length, width, thickness or depth, and waste, then calculate the planning result. In the default example, the result is 2.17 cubic yards.
How many yards of concrete for a 10x16 slab?
At 4 inches thick, a 10x16 slab needs about 1.98 cubic yards before waste and about 2.18 cubic yards with 10% waste.
How many square feet is a 10x16 slab?
A 10 ft by 16 ft slab is 160 square feet. Square footage must still be converted to volume using slab thickness.
Should I use 4 inches or 6 inches for a 10x16 slab?
This calculator estimates quantity only. Required thickness depends on use, load, base, reinforcement, local code, and project plans. Changing thickness has a large effect on cubic yards.
Should I order exactly the calculator result?
No. Use the result as a planning number, keep a waste buffer visible, and confirm final rounding, minimum orders, and delivery rules with the supplier.
Related calculators
This calculator is for planning estimates only. Verify final quantities with product labels, project conditions, and a qualified professional when accuracy matters.