About the Length Converter
This length converter turns any value into metric units (mm, cm, m, km), US customary units (inch, foot, yard, mile) and nautical miles at the same time. Type in either box and the other side updates instantly, and the list below shows the value in every unit.
All conversions use the exact international definitions (1 inch = 2.54 cm, 1 foot = 30.48 cm, 1 mile = 1.609344 km), so results are precise for screen sizes, lumber, running distances or travel.
How to use
- Type a number in the top box and choose its unit.
- Choose the unit you want in the bottom box. Typing in the bottom box converts backwards.
- Tap ⇅ to swap the two units.
- Tap any value under All units to copy it.
- To convert a height, use the Height converter card: enter cm, or feet and inches.
Length conversion chart
| Unit | Metric value | Notes |
|---|---|---|
| 1 inch (in) | 2.54 cm | Exact |
| 1 foot (ft) | 30.48 cm | 12 inches |
| 1 yard (yd) | 91.44 cm | 3 feet |
| 1 mile (mi) | 1.609344 km | 5,280 feet |
| 1 nautical mile (NM) | 1.852 km | Used at sea and in aviation |
| 1 cm | 0.3937 in | — |
| 1 m | 3.2808 ft | ≈ 39.37 in |
| 1 km | 0.6214 mi | — |
Height chart: cm to feet and inches
| cm | Feet & inches |
|---|---|
| 150 cm | 4′ 11.1″ |
| 160 cm | 5′ 3″ |
| 170 cm | 5′ 6.9″ |
| 175 cm | 5′ 8.9″ |
| 180 cm | 5′ 10.9″ |
| 190 cm | 6′ 2.8″ |
FAQ
How many cm are in an inch?
Exactly 2.54 cm. To convert cm to inches, divide by 2.54 (or multiply by 0.3937).
How do I convert my height from cm to feet?
Divide the centimeters by 2.54 to get inches, then divide by 12: the whole number is feet and the remainder is inches. 175 cm = 68.9 in = 5 ft 8.9 in.
How many km is a mile?
One mile is exactly 1.609344 km; one kilometer is about 0.6214 miles. A 5K run is about 3.1 miles and a marathon is 26.2 miles.
What is the difference between a mile and a nautical mile?
A statute mile is 1,609.344 m. A nautical mile is 1,852 m and is used for navigation at sea and in the air; one knot is one nautical mile per hour.