Cubic Feet to Cubic Inches Converter
Convert ft³ to in³: multiply by 1,728. 1 cubic foot = 1,728 cubic inches (12³). Free tool for boxes, tanks, and volume.
How to Convert Cubic foot to Cubic inch
Multiply cubic feet by 1,728.
Conversion Formula:
value * 1728Conversion Examples
Example: 1 ft³ to in³
- 1 × 1,728 = 1,728 in³
1,728 in³
12³ rule.
Example: 2.5 ft³ to in³
- 2.5 × 1,728 = 4,320 in³
4,320 in³
Medium box.
Conversion Chart
| Cubic foot | Cubic inch |
|---|---|
| 1 | 1728 |
| 2 | 3456 |
| 3 | 5184 |
| 4 | 6912 |
| 5 | 8640 |
| 6 | 10368 |
| 7 | 12096 |
| 8 | 13824 |
| 9 | 15552 |
| 10 | 17280 |
| 15 | 25920 |
| 20 | 34560 |
| 30 | 51840 |
Conversion Formula
ft³ × 1,728 = in³
Quick Conversion Tip
Multiply cubic feet by 1,728; remember 1 ft = 12 in so 1 ft³ = 12³ in³.
Unit Definitions
Cubic Foot (ft³)
A cubic foot is a US customary and imperial volume unit defined by a cube that measures one foot on each side.
1 cubic foot = 1728 cubic inches = 28.3168 liters ≈ 7.48052 US gallons
Cubic Inch (in³)
A cubic inch is the volume of a cube with each edge measuring one inch. It is common in small-scale engineering and product dimensions.
1 cubic inch = 0.0163871 liters ≈ 0.004329 US gallons
Common Use Cases
- Shipping and storage box volume.
- Aquarium and tank sizing.
- Construction takeoffs.
- Comparing ft³ listings to in³ specs.
Understanding the Conversion
1 ft³ = 1,728 in³ (12 in × 12 in × 12 in). Multiply ft³ by 1,728.
Examples: 1 ft³ = 1,728 in³ · 2 ft³ = 3,456 in³ · 0.5 ft³ = 864 in³.
For shipping boxes, aquariums, and HVAC duct volume in smaller units.
FAQs
How many cubic inches in a cubic foot?
Exactly 1,728 cubic inches (12 × 12 × 12).
How do you convert ft³ to in³?
Multiply by 1,728. Example: 3 ft³ = 5,184 in³.
Why 1,728?
A cube 1 foot on each side has 12 inches per edge: 12³ = 1,728 cubic inches.