How many cubic feet are in a yard of concrete?
There are 27 cubic feet in 1 cubic yard of concrete. A cubic yard is a 3 ft by 3 ft by 3 ft volume, so 3 x 3 x 3 equals 27 cubic feet.
Why concrete uses cubic yards
Concrete suppliers commonly quote and deliver ready-mix by cubic yard. If your project volume is in cubic feet, divide by 27 to convert it into cubic yards before discussing an order.
Convert cubic feet to yards and back
To convert cubic feet to cubic yards, divide by 27. To convert cubic yards to cubic feet, multiply by 27. For example, 54 cubic feet is 2 cubic yards, and 3 cubic yards is 81 cubic feet.
Use dimensions for the final estimate
The 27 cubic feet conversion explains the unit relationship. For an actual slab, pad, patio, or driveway, enter length, width, thickness, and waste so the page calculates the project volume.
Cubic feet to cubic yards
Divide cubic feet by 27 to convert to cubic yards.
| Cubic feet | Cubic yards |
|---|---|
| 27 cu ft | 1.00 cu yd |
| 54 cu ft | 2.00 cu yd |
| 81 cu ft | 3.00 cu yd |
| 108 cu ft | 4.00 cu yd |
| 135 cu ft | 5.00 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
- One cubic yard equals 27 cubic feet.
- Thickness is entered in inches.
- The estimate assumes a rectangular area.
Example
Estimated concrete needed (cubic yards): 1 cubic yard
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 Cubic Feet in a Yard of Concrete 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 cubic feet in a yard of concrete cubic-yard result?
Use length, width, thickness or depth, and waste, then calculate the planning result. In the default example, the result is 1 cubic yard.
How many cubic feet are in one cubic yard of concrete?
One cubic yard of concrete is 27 cubic feet.
How do I convert cubic feet to concrete yards?
Divide cubic feet by 27. For example, 81 cubic feet divided by 27 equals 3 cubic yards.
How do I convert concrete yards to cubic feet?
Multiply cubic yards by 27. For example, 2 cubic yards equals 54 cubic feet.
Is a yard of concrete the same as one cubic yard?
In ready-mix conversations, a yard of concrete usually means one cubic yard, which is 27 cubic feet.
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This calculator is for planning estimates only. Verify final quantities with product labels, project conditions, and a qualified professional when accuracy matters.