Cubic Foot to Yards Conversion Made Simple

This calculator converts a volume given in cubic feet to cubic yards, or vice versa. You enter the volume in cubic feet (or cubic yards) and it instantly returns the equivalent volume in the other unit, based on the standard conversion factor of 1 cubic yard = 27 cubic feet. Use it for landscaping, concrete, mulch, or any project where materials are sold in cubic yards but your measurements are in cubic feet.

Formula

The conversion between cubic feet and cubic yards is a simple linear relationship:

1 cubic yard = 27 cubic feet

So to convert from cubic feet to cubic yards:

cubic yards = cubic feet ÷ 27

And to convert from cubic yards to cubic feet:

cubic feet = cubic yards × 27

Here, cubic feet (ft³) is the volume of a cube with sides of 1 foot, and cubic yard (yd³) is the volume of a cube with sides of 1 yard (3 feet). Because 1 yard = 3 feet, a cubic yard is 3 × 3 × 3 = 27 cubic feet.

Worked Example

Using the default values from the calculator above:

• Input: 27 cubic feet
• Conversion: 27 ÷ 27 = 1 cubic yard

So 27 cubic feet equals exactly 1 cubic yard. If you had 54 cubic feet, that would be 2 cubic yards (54 ÷ 27 = 2).

Why the 27 Factor? A Quick Background

The reason a cubic yard is 27 cubic feet comes from the definition of a yard. One yard is three feet, so when you cube that (raise it to the third power), you get 3³ = 27. This is a volume conversion, not a linear one. Many people mistakenly think that because 1 yard = 3 feet, then 1 cubic yard = 3 cubic feet. That is wrong—volume scales by the cube of the linear factor.

This conversion is especially common in construction and landscaping. For example, topsoil, mulch, and concrete are often sold by the cubic yard, while your measurements might be in feet. A typical garden bed that is 10 feet long, 4 feet wide, and 0.5 feet deep has a volume of 10 × 4 × 0.5 = 20 cubic feet. Dividing by 27 gives about 0.74 cubic yards—so you would order roughly 0.75 cubic yards of mulch.

How to Use the Calculator

Simply type the volume you know into the appropriate field. If you know the volume in cubic feet, enter it in the first box and read the result in cubic yards. If you know the volume in cubic yards, you can multiply by 27 yourself to get cubic feet, or you can swap the roles mentally—the calculator is set up for the most common direction (ft³ to yd³).

For a quick manual estimate, remember that 1 cubic yard is about the size of a washing machine or a small refrigerator. If your project is bigger than that, you are likely dealing with multiple cubic yards.

Common Mistakes and How to Avoid Them

• Using 3 instead of 27: As noted, this is the most frequent error. Always cube the linear conversion factor.
• Mixing units: Ensure all your measurements are in feet before calculating volume. If you measured in inches, convert to feet first (divide by 12). For example, 6 inches = 0.5 feet.
• Forgetting to divide by 27: When converting from cubic feet to cubic yards, you divide, not multiply. Double-check which direction you need.
• Rounding too early: If you are doing a multi-step calculation, keep extra decimal places until the final answer to avoid rounding errors.

When to Use This Conversion

You will need this conversion in many practical situations:

• Ordering soil, mulch, or gravel for a garden or landscaping project.
• Estimating concrete volume for a slab, footing, or driveway.
• Calculating the capacity of a dumpster or trailer (often rated in cubic yards).
• Comparing prices: if one supplier sells by the cubic foot and another by the cubic yard, you need to convert to compare costs.

For instance, if you are pouring a concrete patio that is 12 feet long, 10 feet wide, and 4 inches thick, the volume is 12 × 10 × (4/12) = 40 cubic feet. That equals 40 ÷ 27 ≈ 1.48 cubic yards. Most concrete suppliers require a minimum order, so knowing this helps you plan.

Limits of the Conversion

This conversion is purely geometric and works for any substance—solid, liquid, or gas—as long as you are measuring volume. However, it does not account for compaction, settling, or waste. For example, when ordering fill dirt, you might need 10% extra to account for settling. Also, for irregular shapes, you must first calculate the volume correctly (using appropriate formulas for the shape) before converting units.

The calculator assumes exact conversion (1 yd³ = 27 ft³ exactly), which is true by definition in both US customary and imperial systems. There are no rounding issues beyond the decimal places you choose.

Frequently Asked Questions

How many cubic feet are in a cubic yard?

There are exactly 27 cubic feet in 1 cubic yard. This is because 1 yard = 3 feet, and 3³ = 27.

How do I convert cubic yards to cubic feet?

Multiply the number of cubic yards by 27. For example, 2 cubic yards × 27 = 54 cubic feet.

What is the difference between a cubic yard and a yard?

A yard is a linear measure of length (3 feet). A cubic yard is a measure of volume (3 feet × 3 feet × 3 feet). They are different dimensions—you cannot convert directly between them.

How many bags of mulch equal a cubic yard?

It depends on the bag size. A typical bag of mulch is 2 cubic feet, so you would need 27 ÷ 2 = 13.5 bags (so about 14 bags) to make 1 cubic yard. For 3-cubic-foot bags, you would need 9 bags.

Is a cubic yard the same as a ton?

No. A cubic yard is a volume, while a ton is a weight. The weight of a cubic yard depends on the material’s density. For example, a cubic yard of dry topsoil weighs about 2,000 pounds (1 ton), but a cubic yard of gravel can weigh about 2,800 pounds (1.4 tons). Always check the density for your specific material.

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in ft3 | Cubic feet | ft³ | 27 | 0
out yd3 | Cubic yards | yd³ | ft3 / 27 | 2