# Feet to Inches Converter

URL: https://speedycalculator.com/calculators/conversion/feet-to-inches/
Last updated: 2026-10-25

> Convert feet (ft) to inches (in): 1 foot = 12 in, so multiply by 12 or divide by 0.083333333. Both fields are editable, so you can also type in inches and get feet back.

## Inputs

- Feet (ft)

## Results

- Inches

## Formula

```
1 ft = 12 in
1 in = 0.083333333 ft
in = ft × 12
```

## Explanation

One foot is 12 inches, so multiply by 12. Decimal feet from a tape or a plan (like 5.75 ft) become 69 inches, or 5 ft 9 in.

### How to use the Feet to Inches Converter

- Type the number of feet into the **Feet** field. Decimals such as 2.75 are fine.
- Read the answer in **Inches** – it updates as you type, with no button to press.
- To convert the other way, type into **Inches** and the feet are recalculated.
- Press **Copy results** to copy both values with the page title, or **Copy link** to share this exact conversion.

This page converts only ft ⇄ in. Need a different unit? Use the general length converter, where you can choose any “from” and “to” unit.

### How it works

Both units measure length, so they are always in the same ratio: one foot equals 12 inches. The calculator multiplies the number of feet you type by 12 to give inches, and when you type into the inches field it divides by the same factor to give feet. Because the ratio never changes, doubling the feet always doubles the inches. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).

### How to convert feet to inches

- Write down the value in feet, for example **5.5 ft**.
- Multiply by the conversion factor 12 (because 1 foot = 12 in).
- 5.5 × 12 = **66 in**.
- To go back from inches to feet, divide by 12 – or multiply by 0.083333333.

### ft to in conversion table

FeetInchesInchesFeet0.25 ft3 in1 in0.083333333 ft0.5 ft6 in2 in0.16666667 ft1 ft12 in5 in0.41666667 ft1.5 ft18 in10 in0.83333333 ft2 ft24 in20 in1.6666667 ft4 ft48 in50 in4.1666667 ft5 ft60 in100 in8.3333333 ft6 ft72 in1,000 in83.333333 ft6.5 ft78 in7 ft84 in10 ft120 in12 ft144 in

### What is a foot?

The international foot is exactly 0.3048 m and contains 12 inches. It remains the everyday unit for height, room dimensions and altitude in the U.S., and for aviation altitude worldwide.

### What is an inch?

The inch has been defined as exactly 25.4 mm since 1959. It is used in the U.S. for almost everything and worldwide for screen sizes, wheel and tyre sizes, pipe threads and many tools.

### Common mistakes to avoid

Mixing the international foot (0.3048 m) with the old u.s. survey foot, confusing nautical and statute miles, and writing decimal feet such as 5.5 ft as “5 ft 5 in” (it is 5 ft 6 in).

## Worked example

Inputs — Feet: 5.5 ft.

Results — **Inches = 66 in**.

## FAQ

**How many inches is 5.5 feet?**
66 inches.

**How do I convert 0.75 ft to inches?**
0.75 × 12 = 9 in.

**How do I convert feet to inches?**
Multiply the number of feet by 12. For example, 5.5 ft × 12 = 66 in.

**How do I convert inches back to feet?**
Divide by 12 (or multiply by 0.083333333), or simply type the value into the inches field above.

**What is 10 ft in inches?**
10 ft = 120 in.

**What is 5 ft in inches?**
5 ft = 60 in.

**Is this conversion exact?**
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.

**Can I convert to other units on this page?**
This page converts only between feet and inches. To pick any length unit, use the general length converter linked under Related calculators.

**What formula does the Feet to Inches Converter use?**
1 ft = 12 in.


## Sources

- [NIST Special Publication 811 – Guide for the Use of the International System of Units](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44 Appendix C – General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)