Contents
- How to Convert Feet to Inches
- Formula
- Feet to Inches Conversion Table
- Real-World Examples
- For Students
- Frequently Asked Questions
- Related Conversions
How to Convert Feet to Inches
1 foot = 12 inches. This means 5 feet equals 60 inches, 6 feet equals 72 inches, and so on.
Feet and inches are both imperial units of length used daily in the United States, Canada, and the United Kingdom. Whether you are measuring your height, checking a piece of lumber, or reading a construction blueprint, converting between feet and inches is one of the most common unit calculations you will encounter.
- Enter your value in feet into the calculator above.
- The calculator multiplies your value by 12 to give you the result in inches. To do this manually, simply take the number of feet and multiply by 12.
- For example, to convert 3.5 feet: 3.5 x 12 = 42 inches.
Formula
Inches = Feet x 12
Take the measurement in feet and multiply it by 12 to get the equivalent in inches. Each foot contains exactly 12 inches – this relationship has been standard since the imperial system was established.
Worked example: 7.5 feet x 12 = 90 inches.
Feet to Inches Conversion Table
| Feet | Inches |
|---|---|
| 0.5 | 6 |
| 1 | 12 |
| 2 | 24 |
| 3 | 36 |
| 4 | 48 |
| 5 | 60 |
| 5.5 | 66 |
| 6 | 72 |
| 7 | 84 |
| 8 | 96 |
| 9 | 108 |
| 10 | 120 |
| 15 | 180 |
| 20 | 240 |
| 25 | 300 |
| 50 | 600 |
| 75 | 900 |
| 100 | 1,200 |
Real-World Examples
A standard interior door in the US is 6.67 feet tall (6 feet 8 inches), which equals 80 inches. Knowing this helps when shopping for replacement doors or planning a renovation.
Ceiling height in most American homes is 8 feet, or 96 inches. If you are installing crown molding or hanging a ceiling fan, you need that measurement in inches to match product specifications.
A regulation basketball hoop stands 10 feet off the ground – that is 120 inches from the floor to the rim. Coaches and players often reference this in inches when discussing vertical leap measurements.
Lumber at the hardware store is sold in foot lengths – a common 2×4 comes in 8-foot boards (96 inches). When cutting pieces for a project, carpenters frequently convert to inches for more precise measurements.
For Students
Feet-to-inches conversion appears regularly in elementary and middle school math classes across the US. It is also a building block for standardized tests like the SAT, where unit conversion word problems are common. The most frequent mistake is dividing instead of multiplying – remember, inches are the smaller unit, so you should always end up with a larger number. A handy memory trick: think of a ruler, which is 1 foot long and has 12 inch marks. Try converting 4.25 feet or 11 feet using the calculator to check your work.
Frequently Asked Questions
How many inches are in one foot?
There are exactly 12 inches in one foot. This is a fixed relationship in the imperial measurement system and does not change regardless of context. To convert any number of feet to inches, multiply by 12.
Is a foot bigger than an inch?
Yes, a foot is larger than an inch. One foot contains 12 inches, making it exactly 12 times longer. When you convert from feet to inches, the resulting number will always be larger than the original.
How do I convert feet to inches without a calculator?
Multiply the number of feet by 12. For whole numbers, this is straightforward mental math – 5 feet is 60 inches, 6 feet is 72 inches. For decimals, break it into parts: 5.5 feet is (5 x 12) + (0.5 x 12) = 60 + 6 = 66 inches.
How do I convert feet and inches to just inches?
When you have a mixed measurement like 5 feet 9 inches, convert the feet portion to inches first (5 x 12 = 60), then add the remaining inches (60 + 9 = 69 inches). This is how height is typically converted for medical forms and fitness tracking.
Why are there 12 inches in a foot?
The number 12 was chosen because it divides evenly by 2, 3, 4, and 6, making it practical for splitting measurements into halves, thirds, and quarters. This base-12 system dates back to ancient Roman and Anglo-Saxon measurement practices.