# Free online length converter

> Length is measured in metric units (millimeters to kilometers) and imperial units (inches to miles). This converter handles both systems and shows every equivalent at once.

Convert length between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles. See all unit equivalents at once.

**Interactive version:** https://onlinecalculator.me/unit-converters/length/
**Category:** Unit Converters

## How to use

1. Enter the length value you want to convert.
2. Choose the unit you are converting from.
3. Choose the unit you want the result in.
4. The converted value appears instantly, along with a table showing the equivalent in every supported unit.

## Conversion reference

| From | To | Multiply by |
|---|---|---|
| Meters | Feet | 3.280840 |
| Feet | Meters | 0.3048 |
| Miles | Kilometers | 1.60934 |
| Kilometers | Miles | 0.621371 |
| Inches | Centimeters | 2.54 |
| Centimeters | Inches | 0.393701 |
| Yards | Meters | 0.9144 |
| Meters | Yards | 1.093613 |

All conversions use the exact international definitions. For example, 1 inch = 2.54 cm and 1 foot = 0.3048 m are exact (not rounded).

## Common length comparisons

- A standard door is about 2 meters (6.6 feet) tall.
- A football field (American) is 100 yards (91.44 meters) long.
- Mount Everest is 8,848.86 meters (29,031.7 feet) above sea level.
- The average adult stride is about 0.75 meters (2.5 feet).

## Notes

- All conversion factors are based on the 1959 International Yard and Pound Agreement and SI definitions.
- Results are rounded to 6 decimal places.

## Frequently asked questions

### How many feet are in a meter?

1 meter = 3.280839895 feet. Equivalently, 1 foot = 0.3048 meters exactly (by international definition since 1959).

### How many centimeters are in an inch?

1 inch = 2.54 centimeters exactly. This is the exact definition set by the International Yard and Pound Agreement in 1959.

### How many meters are in a mile?

1 mile = 1,609.344 meters, or about 1.609 kilometers. One kilometer is roughly 0.621 miles.

### How do you convert kilometers to miles?

Multiply by 0.621371. Example: 5 km × 0.621371 = 3.107 miles. To go the other way, multiply miles by 1.60934.

### How many inches are in a foot?

12 inches exactly. 1 foot = 12 inches, 1 yard = 3 feet = 36 inches.

### What is the difference between a nautical mile and a regular mile?

A nautical mile is 1,852 meters (1.852 km), while a statute mile is 1,609.344 meters. Nautical miles are not in this converter; use the speed converter for knot-related distances.

## Sources

- [Metre — SI base unit of length and conversions](https://en.wikipedia.org/wiki/Metre) — Wikipedia
- [Unit of length — metric and imperial units with factors](https://en.wikipedia.org/wiki/Unit_of_length) — Wikipedia

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