Easily cubic yards calculator , feet, and meters for mulch, soil, gravel, or concrete. Enter US or metric units and get instant volume and cost estimates.

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Cubic Yards Calculator: Fast Volume & Cost Guide

Need mulch, soil, gravel, concrete, or fill? Use this guide to figure out cubic yards, cubic feet, and cubic meters from your measurements. Enter sizes in inches or feet (US units) or centimeters or meters (metric). You can also add a price to estimate total material cost.

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How to Enter Measurements

• You can type whole numbers or decimals.
• Example: 7′3″ = 7.25 ft (because 3 ÷ 12 = 0.25).
• Example: 245 cm = 2.45 m.
• Already have square feet only? Pick Rectangle, put your square feet in Length, set Width = 1, and enter Depth. The result will still be in cubic yards.

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Quick Steps (Feet & Inches)

1. Measure your area in feet.
2. Choose a depth (often in inches for mulch/soil).
3. Convert to feet

• Inches only → divide by 12.
• Feet & inches → inches ÷ 12, then add to feet.

1. Find area (depends on shape—see below).
2. Get volume in cubic feet: Volume = Area × Depth.
3. Convert to cubic yards: Cubic Yards = Cubic Feet ÷ 27.

Tip: ft² = square feet, ft³ = cubic feet, yd³ = cubic yards.

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Shape Formulas (Using Feet)

1) Square

• Area (ft²) = side × side
• Volume (ft³) = area × depth
• Cubic yards = volume ÷ 27

2) Rectangle

• Area (ft²) = length × width
• Volume (ft³) = area × depth
• Cubic yards = volume ÷ 27

3) Rectangle Border (Frame)

• Inner area (ft²) = inner length × inner width
• Total area (ft²) = (length + 2×border) × (width + 2×border)
• Area (ft²) = total − inner
• Volume / Cubic yards: same steps as above

4) Circle

• Area (ft²) = π × (diameter ÷ 2)²
• Volume / Cubic yards: same steps

5) Circle Border / Annulus

• Outer diameter = inner diameter + 2×border
• Outer area (ft²) = π × (outer diameter ÷ 2)²
• Inner area (ft²) = π × (inner diameter ÷ 2)²
• Area (ft²) = outer − inner
• Volume / Cubic yards: same steps

Use π ≈ 3.14.

6) Triangle

• Area (ft²) using side lengths a, b, c (Heron’s formula):
• s = (a + b + c) ÷ 2
• Area = √[ s(s − a)(s − b)(s − c) ]
• Volume / Cubic yards: same steps

7) Trapezoid

• Area (ft²) = ((base₁ + base₂) ÷ 2) × height
• Volume / Cubic yards: same steps

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Worked Example (Rectangle)

• Size: 20 ft × 10 ft
• Depth: 3 inches = 0.25 ft
• Area: 20 × 10 = 200 ft²
• Volume: 200 × 0.25 = 50 ft³
• Cubic yards: 50 ÷ 27 ≈ 1.85 yd³

Cost Example

• Price: \$45 per yd³
• Total cost: 1.85 × 45 ≈ \$83.25

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Metric Notes

• Convert cm → m by dividing by 100.
• Get m³ with the same shape formulas.
• Convert to cubic yards: yd³ = m³ × 1.30795.
• Convert to cubic feet: ft³ = m³ × 35.3147.

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FAQs

Q1: What depth should I use for mulch or soil?

Common depths are 2–3 inches for mulch and 4–6 inches for new soil beds. Always check your project needs.

Q2: Why divide by 27 for cubic yards?

Because 1 cubic yard = 27 cubic feet (3 ft × 3 ft × 3 ft).

Q3: Can I enter decimals?

Yes. Decimals make mixed feet-and-inches easy (e.g., 7.25 ft).

Q4: How do I estimate extra material?

Add 5–10% for settling, waste, and uneven ground.

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