Cubic To Feet Calculator

Popular Cubic Feet Search Intents

Jump directly to the calculator or guide that matches your use case.

What You Can Do With This Calculator

• Convert any volume to cubic feet — enter a value in cubic inches, gallons, liters, cubic meters, or cubic yards
• Calculate shipping container space — find the cubic footage of standard 20-foot and 40-foot containers
• Estimate moving truck capacity — determine how many cubic feet of space you need for a move
• Measure landscaping materials — calculate cubic feet of soil, mulch, and gravel for garden beds, driveways, and lawns
• Calculate concrete volume — find the cubic feet of concrete needed for slabs, footings, and driveways

How to Calculate Cubic Feet

Step-by-Step Guide

1. Measure the length of the space in feet.
2. Measure the width of the space in feet.
3. Measure the height of the space in feet.
4. Multiply all three values: Length × Width × Height = Volume in cubic feet (ft³).

Volume Calculation Formula in Cubic Feet

Understand How the Calculator Works

Enter length, width, and height. Select the unit for each dimension — feet, inches, meters, or centimeters. The cubic feet calculator converts all values to feet, then multiplies them. The result is volume in cubic feet (ft³).

Standard Container Sizes in Cubic Feet

How to Calculate Cubic Feet From Inches

Divide each measurement by 12 to convert inches to feet, then multiply. Or multiply all three inch values, then divide by 1,728.

Inches to Cubic Feet Example

A box measures 24 inches × 18 inches × 18 inches.

CBM Calculator

CBM stands for cubic meters (m³). 1 cubic meter = 35.3147 cubic feet. To convert, multiply the CBM value by 35.3147. The unit converter tab handles this conversion automatically.

What is a Cubic Foot?

A cubic foot (ft³) is a unit of volume equal to a cube measuring 1 foot (12 inches) on each side. One cubic foot equals:

• 1,728 cubic inches
• 28.3168 liters
• 7.48052 US gallons
• 0.0283168 cubic meters
• 0.037037 cubic yards (1/27 of a cubic yard)

Cubic feet measure three-dimensional volume. Square feet (ft²) measure two-dimensional area. Volume adds height to area: Area (ft²) × Height (ft) = Volume (ft³).

Why Measure Cubic Feet?

Cubic feet (ft³) is the standard volume unit in the U.S. for real estate, moving, shipping, HVAC, landscaping, and construction.

Calculate Cubic Feet for Moving

Moving companies price moves by cubic feet. A 1-bedroom apartment needs 150–300 cubic feet of truck space. A 3-bedroom house needs 600–1,000 cubic feet. Measure each item's volume, then add them up.

Calculate Cubic Feet for Landscaping Material (Mulch, Gravel, Soil)

Landscaping materials sell by the cubic yard (27 cubic feet) or cubic foot. Measure the bed's length, width, and depth in feet. Multiply all three for cubic feet. A 10ft × 4ft bed at 3 inches deep = 10 × 4 × 0.25 = 10 ft³ of mulch.

Calculating Cubic Feet of Soil

For raised garden beds, multiply length × width × depth (all in feet). A 4ft × 8ft × 1ft raised bed needs 32 cubic feet of soil. That equals about 1.19 cubic yards.

How to Calculate Cubic Feet: Volume Formula for Common Shapes

Calculating Irregular Shapes

For irregular shapes, break the space into smaller rectangles, cylinders, or triangles. Calculate cubic feet for each section separately. Add the volumes together for the total.

For an L-shaped room: split it into two rectangles, calculate each volume, and add. For a pool with a shallow and deep end: treat each section as a separate shape.

Converting From Units Other Than Feet

When measurements are in inches, meters, yards, or centimeters, convert each dimension to feet first. Then multiply for volume.

Calculating Cubic Feet From Meters

Multiply each meter measurement by 3.28084 to get feet. Then multiply for volume. A space 2m × 3m × 2.5m = 6.56 × 9.84 × 8.20 = 529.72 ft³.

Calculating Cubic Feet From Yards

Multiply each yard by 3 to get feet. A space 4yd × 3yd × 2yd = 12 × 9 × 6 = 648 ft³.

How to Convert From Cubic Inches to Cubic Feet

Divide cubic inches by 1,728. There are 1,728 cubic inches in one cubic foot (12 × 12 × 12 = 1,728). Example: 5,184 in³ ÷ 1,728 = 3 ft³.

How to Find Cubic Feet Using Square Feet

Multiply the square footage by the height in feet. Square feet measures area (2D). Multiply by height to get volume (3D). A 200 ft² room with 8 ft ceilings = 200 × 8 = 1,600 ft³.

How to Convert a Volume to Cubic Feet

Use these conversion factors:

• Cubic inches → ft³: divide by 1,728
• Cubic meters → ft³: multiply by 35.3147
• Cubic yards → ft³: multiply by 27
• Liters → ft³: multiply by 0.0353147
• Gallons (US) → ft³: multiply by 0.133681

Real World Examples

Example 1: Moving Boxes

You have 20 medium moving boxes (18" × 18" × 16" each). Each box = 18 × 18 × 16 = 5,184 in³ ÷ 1,728 = 3.0 ft³. Total for 20 boxes: 20 × 3.0 = 60 ft³.

Example 2: Landscaping Project

A garden bed measures 12 ft long × 6 ft wide. You want 4 inches of mulch depth. Volume = 12 × 6 × (4/12) = 12 × 6 × 0.333 = 24 ft³ of mulch. That equals about 0.89 cubic yards.

Related Volume Calculators