Cubic Inches Calculator: Fast Volume Helper

Need box volume fast. Use this cubic inches calculator to get clean numbers.

Enter length, width, and height in inches. See volume in cubic inches, cubic feet, gallons, and liters.

What Is the Cubic Inches Calculator?

This tool finds the volume of a rectangular box or space. It multiplies length by width by height to give cubic inches.

You also get handy unit conversions. The results include cubic feet, United States gallons, and liters.

Use it for boxes, drawers, cases, tanks, and storage bins. Any shape with straight sides and right angles works well.

How Does It Work?

The math is simple and clear. Volume equals length times width times height, all in inches.

• Length in inches: Measure the longest side. Decimals work fine.
• Width in inches: Measure the shorter side across the base.
• Height in inches: Measure the vertical side from base to top.

Here is what the results mean and how the tool calculates them.

• Cubic inches: The main volume output. Rounded to two decimals.
• Cubic feet: Cubic inches divided by 1728. Labeled ft³ and rounded to three decimals.
• Gallons: United States gallons. Cubic inches divided by 231. Rounded to two decimals.
• Liters: Cubic inches multiplied by 0.016387064. Rounded to two decimals.

Notes and limits that help you get accurate results.

• Measure inside dimensions for containers that hold liquid.
• Use positive numbers in every field to run the calculation.
• Decimals work for partial inches like 12.5 or 3.25.
• Keep all measurements in inches for this calculator.
• Press Enter in any field to run the math fast.
• Convert feet to inches by multiplying by 12 before you enter values.

How to Use This Tool

1. Measure the length, width, and height in inches with a tape measure.
2. Type each number into the matching field labeled length, width, and height.
3. Click Calculate Volume or press Enter to see your results.
4. Read the volume in cubic inches, cubic feet, gallons, and liters.
5. Adjust a value if needed, then run the calculation again.

Common use cases that show how this helps in real life.

• Shipping box: 18 by 12 by 10 inches gives 2160 cubic inches. That is 1.25 cubic feet, 9.35 gallons, and 35.40 liters.
• Fish tank: 24 by 12 by 16 inches gives 4608 cubic inches. That is 2.667 cubic feet, 19.95 gallons, and 75.51 liters.
• Storage bin: 16 by 10 by 12 inches gives 1920 cubic inches. That is 1.111 cubic feet, 8.31 gallons, and 31.46 liters.

The cubic inches calculator keeps the steps short and the math correct. Measure, enter, click, and you are set.