18 inches equals 1.5 feet.
Table of Contents
To convert 18 inches to feet, you divide the number of inches by 12, because there are 12 inches in one foot. So, 18 divided by 12 gives 1.5 feet, meaning 18 inches is one and a half feet long.
Conversion Tool
Result in ft:
Conversion Formula
The conversion formula from inches to feet is simple: feet = inches ÷ 12. This works because one foot contains exactly 12 inches. Dividing the number of inches by 12 breaks it down into whole feet and fractional parts of a foot.
For example, converting 18 inches:
- Start with 18 inches
- Divide 18 by 12: 18 ÷ 12 = 1.5
- The result 1.5 means 1 full foot and half a foot
Conversion Example
- Convert 24 inches to feet:
- Take 24 inches
- Divide by 12: 24 ÷ 12 = 2
- Answer: 24 inches equals 2 feet
- Convert 9 inches to feet:
- Start with 9 inches
- Divide 9 by 12: 9 ÷ 12 = 0.75
- Result: 0.75 feet, or 3/4 of a foot
- Convert 36 inches to feet:
- Take 36 inches
- Divide by 12: 36 ÷ 12 = 3
- So 36 inches equals 3 feet
- Convert 15 inches to feet:
- Start at 15 inches
- Divide by 12: 15 ÷ 12 = 1.25
- Answer: 1.25 feet or 1 foot and 3 inches
Conversion Chart
| Inches (in) | Feet (ft) |
|---|---|
| -7.0 | -0.5833 |
| -6.0 | -0.5000 |
| -5.0 | -0.4167 |
| -4.0 | -0.3333 |
| -3.0 | -0.2500 |
| -2.0 | -0.1667 |
| -1.0 | -0.0833 |
| 0.0 | 0.0000 |
| 1.0 | 0.0833 |
| 2.0 | 0.1667 |
| 3.0 | 0.2500 |
| 4.0 | 0.3333 |
| 5.0 | 0.4167 |
| 6.0 | 0.5000 |
| 7.0 | 0.5833 |
| 8.0 | 0.6667 |
| 9.0 | 0.7500 |
| 10.0 | 0.8333 |
| 11.0 | 0.9167 |
| 12.0 | 1.0000 |
| 13.0 | 1.0833 |
| 14.0 | 1.1667 |
| 15.0 | 1.2500 |
| 16.0 | 1.3333 |
| 17.0 | 1.4167 |
| 18.0 | 1.5000 |
| 19.0 | 1.5833 |
| 20.0 | 1.6667 |
| 21.0 | 1.7500 |
| 22.0 | 1.8333 |
| 23.0 | 1.9167 |
| 24.0 | 2.0000 |
| 25.0 | 2.0833 |
| 26.0 | 2.1667 |
| 27.0 | 2.2500 |
| 28.0 | 2.3333 |
| 29.0 | 2.4167 |
| 30.0 | 2.5000 |
| 31.0 | 2.5833 |
| 32.0 | 2.6667 |
| 33.0 | 2.7500 |
| 34.0 | 2.8333 |
| 35.0 | 2.9167 |
| 36.0 | 3.0000 |
| 37.0 | 3.0833 |
| 38.0 | 3.1667 |
| 39.0 | 3.2500 |
| 40.0 | 3.3333 |
| 41.0 | 3.4167 |
| 42.0 | 3.5000 |
| 43.0 | 3.5833 |
The chart shows inches on the left column and equivalent feet on the right. To find feet for any inches in the range, look up the inches value and read the corresponding feet. Negative values means measurements below zero, which can represent depth or loss.
Related Conversion Questions
- How many feet are in 18 inches exactly?
- What’s the decimal equivalent of 18 inches in feet?
- Can 18 inches be converted to feet with fractions?
- How do I convert 18 inches to feet using a calculator?
- Is 18 inches equal to 1.5 feet or 2 feet?
- What’s the quickest way to change 18 in to ft?
- How accurate is converting 18 inches to feet using division?
Conversion Definitions
in (inch): An inch is a unit of length in the imperial and US customary systems, equal to 1/12 of a foot. It is commonly used to measure small distances or dimensions, such as screen sizes, height, or thickness. The inch is subdivided into smaller fractions, like halves or sixteenths.
ft (foot): A foot is a unit of length in the imperial and US customary systems, equal to 12 inches. It is used to measure medium distances like room dimensions, height, or fabric length. The foot can be divided into inches for finer measurements, making it practical for everyday use.
Conversion FAQs
Why do we divide inches by 12 to get feet?
Because the foot is defined as 12 inches, dividing the number of inches by 12 converts those inches into feet. This relationship is fixed and standard, so the division directly translates inches into the equivalent length in feet.
Can inches be converted into feet without fractions?
Only if the number of inches is a multiple of 12, the result will be a whole number of feet. Otherwise, the answer will include fractional feet. For example, 24 inches equals 2 feet, but 18 inches equals 1.5 feet, a fraction.
How precise is this conversion for engineering or construction?
The conversion is exact mathematically, but practical precision depends on measuring accuracy. Usually, measuring to the nearest inch or fraction of inch is enough. However, in very sensitive projects, decimals or fractions of inches are used to improve accuracy.
Is the conversion formula different for metric units?
Yes, metric units use centimeters and meters, where 1 meter equals 100 centimeters. Inches and feet belong to imperial units. To convert imperial to metric requires different formulas, such as 1 inch equals 2.54 centimeters.
How do negative inch values convert to feet?
Negative inches convert to negative feet using the same division by 12. This can represent measurements below a reference point, like below ground level or losses. For example, -18 inches converts to -1.5 feet.