Cubic Feet to Cubic Inches Converter
Unit ConversionConvert cubic feet to cubic inches. 1 cubic foot equals exactly 1,728 cubic inches, with a conversion table, worked examples and the reverse conversion.
Cubic Inches
Equivalent volume in cubic inches
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SponsoredThis converter turns cubic feet into cubic inches (ft3 to in3). Enter a value and the result updates as you type. 1 cubic foot equals exactly 1,728 cubic inches.
Engine, cylinder and small-part specs are given in cubic inches, while larger spaces are rated in cubic feet. Multiplying by 1,728 brings a cubic foot figure down to cubic inches, which is handy when a part or a container must fit inside a known space.
The result is rounded to 2 decimal places, but the factor behind it never is, so long chains of conversions stay accurate. Type a whole number or a decimal; the conversion table below lists common values.
How to Convert Cubic Feet to Cubic Inches
To convert cubic feet to cubic inches, multiply by 1,728. For example, 4 cubic feet equals exactly 6,912 cubic inches.
To go from cubic inches back to cubic feet, divide by 1,728. For example, 5,000 cubic inches is about 2.8935 cubic feet.
Cubic Feet to Cubic Inches Conversion Table
Common values in cubic feet converted to cubic inches, rounded to 2 decimal places.
| Cubic Feet | Cubic Inches |
|---|---|
| 0.1 ft³ | 172.8 in³ |
| 0.25 ft³ | 432 in³ |
| 0.5 ft³ | 864 in³ |
| 0.75 ft³ | 1,296 in³ |
| 1 ft³ | 1,728 in³ |
| 1.5 ft³ | 2,592 in³ |
| 2 ft³ | 3,456 in³ |
| 2.5 ft³ | 4,320 in³ |
| 3 ft³ | 5,184 in³ |
| 5 ft³ | 8,640 in³ |
| 10 ft³ | 17,280 in³ |
| 27 ft³ | 46,656 in³ |
Why the Factor Is 1,728
A foot is 12 inches, and volume multiplies three lengths, so the factor is 12 cubed. Using 12 instead of 1,728 is the most common mistake with this conversion: 2 cubic feet is 3,456 cubic inches, not 24.
To find the cubic inches of a box or a hole from its size, the Hole Volume Calculator handles round and square holes, and the Rectangular Box Weight Calculator turns a box's size and material into a weight.
Frequently Asked Questions
How many cubic inches is 6 cubic feet?
10,368 cubic inches.
How many cubic inches is 8 cubic feet?
13,824 cubic inches.
How many cubic inches is 15 cubic feet?
25,920 cubic inches.
How many cubic inches is 25 cubic feet?
43,200 cubic inches.
How many cubic inches is 40 cubic feet?
69,120 cubic inches.
What happens if I enter a negative number?
The result shows a dash. A volume is an amount of space, so it is never below zero; a minus sign in front of a value is usually a typing slip.
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