Cubic Feet to Cubic Yards Conversion (ft³ to yd³)

One cubic yard equals exactly 27 cubic feet, so to convert cubic feet to cubic yards you divide the number of cubic feet by 27. For example, 54 cubic feet is 2 cubic yards (54 ÷ 27 = 2). This calculator does that conversion instantly: enter any volume in cubic feet and it returns the equivalent in cubic yards, along with the result in cubic meters for reference.

Formula

The conversion uses the fixed relationship between the two units:

1 cubic yard = 27 cubic feet

So the formula is:

yd³ = ft³ ÷ 27

Where:

• ft³ = volume in cubic feet (the value you enter)
• yd³ = volume in cubic yards (the result)

Because a yard is 3 feet long, a cubic yard is 3 ft × 3 ft × 3 ft = 27 cubic feet. This is a linear conversion factor—it does not change with temperature, pressure, or material.

Worked Example

Using the calculator’s default value of 27 cubic feet:

1. Start with 27 ft³.
2. Divide by 27: 27 ÷ 27 = 1.
3. The result is 1 cubic yard.

For a more realistic example, suppose you order 54 cubic feet of garden soil. Divide 54 by 27 to get 2 cubic yards. The calculator shows 2.00 yd³ and also 1.53 m³ (since 54 × 0.028316846592 ≈ 1.53).

Why Convert Between Cubic Feet and Cubic Yards?

Both units measure volume, but they are used in different contexts. Cubic feet are common for smaller quantities—appliance sizes, shipping boxes, or the volume of a room. Cubic yards are the standard unit for bulk materials like concrete, topsoil, mulch, gravel, and sand. When you order fill dirt or ready-mix concrete, suppliers quote in cubic yards. Knowing how to convert helps you compare prices, estimate how much material you need, and avoid ordering too much or too little.

For example, if a project requires 108 cubic feet of concrete, dividing by 27 gives 4 cubic yards—exactly what you would tell the ready-mix company. Conversely, if a supplier quotes 0.5 cubic yards of mulch, multiplying by 27 tells you that is 13.5 cubic feet.

How to Use the Calculator

Enter the volume in cubic feet in the input field. The calculator immediately shows the equivalent in cubic yards (the main result) and in cubic meters (a secondary result). The formula is applied automatically, so you don’t need to do any math yourself.

If you have measurements in feet and inches, first convert everything to feet. For instance, a pile that is 3 ft long, 2 ft wide, and 1.5 ft high has a volume of 3 × 2 × 1.5 = 9 ft³. Then enter 9 to get 0.33 yd³ (since 9 ÷ 27 = 0.333).

The calculator works for any positive number of cubic feet. It does not require you to know the shape of the object—only the total volume matters.

Common Mistakes and How to Avoid Them

• Confusing cubic feet with square feet: Cubic feet measure volume (length × width × height). Square feet measure area (length × width). You can only convert between cubic feet and cubic yards, not between cubic feet and square feet.
• Using the wrong conversion factor: Some people mistakenly divide by 3 (the linear conversion) instead of 27 (the cubic conversion). Always divide by 27 when going from cubic feet to cubic yards.
• Forgetting to convert inches to feet: If you measure in inches, convert to feet first (divide by 12) before calculating volume. Otherwise your result will be off by a factor of 1,728.
• Rounding too early: If you round intermediate results, you may get a slightly different final answer. Keep full precision until the end, then round to the desired number of decimal places.

For example, if you have 100 cubic feet and you divide by 27, you get 3.7037… cubic yards. If you round that to 3.7, you lose a small amount of precision. For ordering materials, it is usually fine to round up to the next whole cubic yard to ensure you have enough.

Real-World Applications

Here are three common situations where you might need this conversion:

• Landscaping: You want to cover a garden bed with 2 inches of mulch. The bed is 10 ft by 4 ft, so the area is 40 ft². Two inches is 2/12 = 0.1667 ft. Volume = 40 × 0.1667 = 6.67 ft³. Divide by 27 to get 0.247 yd³. You would order about 0.25 cubic yards.
• Concrete slabs: A patio slab is 12 ft long, 10 ft wide, and 4 inches thick. Thickness in feet = 4/12 = 0.333 ft. Volume = 12 × 10 × 0.333 = 40 ft³. In cubic yards, that is 40 ÷ 27 ≈ 1.48 yd³. Ready-mix concrete is often ordered in quarter-yard increments, so you might order 1.5 cubic yards.
• Moving and storage: A storage unit measures 10 ft × 10 ft × 8 ft, giving 800 ft³. That equals 800 ÷ 27 ≈ 29.6 yd³. Knowing this helps you compare storage unit sizes, which are often described in cubic feet.

Limits of the Formula

The conversion is exact and universal—27 is a constant. The only limitations come from how you measure the original volume. If you measure dimensions in inches, centimeters, or meters, you must convert them to feet before using this calculator. The calculator assumes your input is already in cubic feet.

Also, the formula does not account for material compaction, settling, or waste. When ordering bulk materials, add a small extra amount (typically 5–10%) to cover spillage and settling. For instance, if you calculate 2 cubic yards of soil, you might order 2.2 cubic yards to be safe.

Frequently Asked Questions

How many cubic feet are in a cubic yard?
Exactly 27 cubic feet. This is because a yard is 3 feet long, so a cubic yard is 3 ft × 3 ft × 3 ft = 27 ft³.

Can I convert square feet to cubic yards?
No. Square feet measure area (2D), while cubic yards measure volume (3D). To get cubic yards, you need a depth or height as well. For example, 100 square feet at 6 inches deep is 100 × 0.5 = 50 ft³, which is about 1.85 yd³.

What is the difference between a yard and a cubic yard?
A yard is a unit of length (3 feet). A cubic yard is a unit of volume (a cube that is 1 yard on each side). The word “yard� alone is often used informally to mean “cubic yard� in construction, but technically they are different.

How do I convert cubic yards back to cubic feet?
Multiply the number of cubic yards by 27. For example, 3 cubic yards × 27 = 81 cubic feet.

Why do suppliers sell materials by the cubic yard?
Bulk materials like soil, gravel, and concrete are measured in large volumes, and the cubic yard is a convenient size. A cubic yard of material is roughly the amount a small pickup truck can carry, making it a practical unit for ordering.

Is the conversion the same for all materials?
Yes, the volume conversion is identical for any material. However, weight varies by material—a cubic yard of feathers weighs far less than a cubic yard of gravel. The calculator only converts volume, not weight.

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in ft3 | Cubic feet | ft³ | 27 | 0
out yd3 | Cubic yards | yd³ | ft3 / 27 | 2
out m3 | Cubic meters | m³ | ft3 * 0.028316846592 | 2