Cubic Yard Calculator

A cubic yard is a 3D unit of volume measuring 3 feet wide by 3 feet long by 3 feet high (27 cubic feet). It is the universal bulk measurement unit for ordering concrete, topsoil, gravel, mulch, and sand.

To use the Cubic Yard Calculator, enter your Length, Width, Depth / Thickness and other values. The calculator instantly computes Total Cubic Yards Required, Total Volume in Cubic Feet and more. Results update in real time as you change any input — no submit button needed.

How to Use This Calculator

Enter your Length (e.g. 30 in feet), Width (e.g. 20 in feet), Depth / Thickness (e.g. 4 in inches), Waste Factor — choose from options such as 0% (Exact), 5% (Standard), 10% (Recommended), and Price per Cubic Yard (optional) (e.g. 135 in /cu yd). Results update instantly as you type — no submit button or page reload required. Adjust any value to compare scenarios side by side.

The Formula

Depth in Feet = Depth (inches) ÷ 12

Volume (Cubic Feet) = Length (ft) × Width (ft) × Depth (ft) × (1 + Waste% / 100)

Cubic Yards = Volume (Cubic Feet) ÷ 27

Worked Example

Pouring a 30 ft × 20 ft concrete patio slab at 4 inches depth with 10% waste allowance.

• Depth in feet: 4 ÷ 12 = 0.3333 ft.

• Unadjusted Volume: 30 × 20 × 0.3333 = 200 cu ft.

• With 10% Waste: 200 × 1.10 = 220 cu ft.

• Total Cubic Yards: 220 ÷ 27 = 8.15 cu yd.

• At 135/cu yd, estimated concrete cost = 8.15 × 135 = 1,100.

25.

Understanding Your Result

Evaluate your result against the specific financial decision driving this calculation. Small input differences can create large output swings — run two or three scenarios (conservative, base, optimistic) to understand the range of outcomes. For decisions involving more than a month's income, validate your result against a second source or consult a certified financial planner (CFP) or CPA depending on the tax implications.