Length Converter Online — Meters, Feet, Inches & More Free
A length converter online instantly converts values between metric and imperial units — meters, centimeters, kilometers, feet, inches, miles, yards, and more. Whether you are reading a blueprint in feet and inches, comparing running distances in miles and kilometers, or working with measurements from a US product manual, the converter gives you the answer immediately.
Length Unit Conversion Factors
| From | To | Multiply by |
|---|---|---|
| Meters (m) | Feet (ft) | 3.28084 |
| Feet (ft) | Meters (m) | 0.3048 |
| Centimeters (cm) | Inches (in) | 0.393701 |
| Inches (in) | Centimeters (cm) | 2.54 |
| Kilometers (km) | Miles (mi) | 0.621371 |
| Miles (mi) | Kilometers (km) | 1.60934 |
| Yards (yd) | Meters (m) | 0.9144 |
| Nautical miles (nmi) | Kilometers (km) | 1.852 |
How to Use the Length Converter
- Enter the value. Type the length you want to convert.
- Select the unit. Choose the source unit from the dropdown — meters, feet, inches, miles, kilometers, or others.
- Read all conversions. Equivalent values in all other units appear instantly.
Common Length Reference Points
| Reference | Metric | Imperial |
|---|---|---|
| Average adult height (male) | 175 cm | 5 ft 9 in |
| Standard door height | 203 cm | 6 ft 8 in |
| Olympic swimming pool | 50 m | 164 ft |
| Marathon distance | 42.195 km | 26.219 miles |
| Football pitch (FIFA) | 100–110 m | 109–120 yards |
| One nautical mile | 1.852 km | 1.151 miles |
Metric vs Imperial Length
The metric system uses a base-10 structure: 10 millimeters = 1 centimeter, 100 centimeters = 1 meter, 1,000 meters = 1 kilometer. This makes arithmetic and unit conversion straightforward. The imperial system has arbitrary conversion factors: 12 inches = 1 foot, 3 feet = 1 yard, 1,760 yards = 1 mile. The US, Liberia, and Myanmar are the only countries that have not officially adopted metric as the primary measurement system.
In practice, most countries use metric for everyday measurements but encounter imperial in imported products, older buildings, US-produced software, and aviation (altitude in feet, speed in knots).
Common Questions
How many feet in a meter?
One meter equals exactly 3.28084 feet, or approximately 3 feet 3.37 inches. A quick mental approximation: 1 meter ≈ 3.3 feet, or multiply meters by 3.28 for feet.
How many kilometers in a mile?
One mile equals exactly 1.60934 km. A useful approximation: multiply miles by 1.6 to get kilometers, or divide kilometers by 1.6 to get miles. For running pace conversions (min/km to min/mile), multiply the km pace by 1.609.
What is a nautical mile and why is it used?
A nautical mile is defined as one minute of arc along a meridian (line of longitude) on the Earth's surface — approximately 1,852 meters. This makes navigation using latitude/longitude coordinates straightforward: one degree of latitude = 60 nautical miles. It is used in aviation, maritime navigation, and international airspace.
Convert Length Now
Enter any length in meters, feet, inches, miles, or kilometers and instantly see all equivalent values — free, no signup, instant results.
Open Length Converter