Length Converter
Convert between 30+ different length and distance units instantly. From millimeters to light years, our length calculator provides accurate conversions for all your measurement needs.
How to Use Our Length Converter
Step-by-Step Guide:
- 1 Enter the length value you want to convert in the "From" field
- 2 Select the current unit from the dropdown menu
- 3 Choose the target unit in the "To" section
- 4 Get instant conversion results automatically
Popular Conversions:
- Feet to Meters
- Inches to Centimeters
- Kilometers to Miles
- Yards to Meters
- Millimeters to Inches
Frequently Asked Questions
Free Length Converter — Convert Between 30+ Units Instantly
Convert between meters, feet, inches, kilometers, miles, centimeters, millimeters, yards, nautical miles, and 20+ more length units with precision up to 10 decimal places. This free tool handles conversions for construction, engineering, science, travel, and everyday measurements.
Common Length Conversions Reference
| From | To | Multiply by | Example |
|---|---|---|---|
| Inches | Centimeters | 2.54 | 12 in = 30.48 cm |
| Feet | Meters | 0.3048 | 6 ft = 1.8288 m |
| Yards | Meters | 0.9144 | 100 yd = 91.44 m |
| Miles | Kilometers | 1.60934 | 1 mi = 1.609 km |
| Kilometers | Miles | 0.62137 | 10 km = 6.214 mi |
| Meters | Feet | 3.28084 | 1.8 m = 5.906 ft |
| Centimeters | Inches | 0.3937 | 170 cm = 66.93 in |
| Nautical Miles | Kilometers | 1.852 | 1 NM = 1.852 km |
Metric System (SI Units)
The metric system uses base-10 prefixes making conversions straightforward:
- 1 kilometer (km) = 1,000 meters
- 1 meter (m) = 100 centimeters = 1,000 millimeters
- 1 centimeter (cm) = 10 millimeters
- 1 micrometer (µm) = 0.001 millimeters
- 1 nanometer (nm) = 0.001 micrometers
Used worldwide in science, medicine, and most countries' daily life. India officially uses the metric system.
Imperial / US Customary System
Used primarily in the United States, UK (partially), and a few other countries:
- 1 mile = 5,280 feet = 1,760 yards
- 1 yard = 3 feet = 36 inches
- 1 foot = 12 inches
- 1 inch = 2.54 centimeters (exact)
- 1 nautical mile = 1.852 km (used in aviation/shipping)
Common in US construction, real estate (square feet), and road signs (miles).
How to Use This Length Converter
- Enter a value — type the number you want to convert in the input field.
- Select source unit — choose the unit you are converting from (e.g., feet, inches, meters).
- Select target unit — choose the unit to convert to.
- Get instant result — the converted value appears immediately with high precision.
- View all conversions — the tool also shows the entered value converted to all 30+ supported units simultaneously.
Practical Conversion Examples
5 ft = 60 in. Total = 70 in × 2.54 = 177.8 cm. Used for passport applications, medical records, and international communication.
12 ft = 3.66 m, 15 ft = 4.57 m. Room = 3.66 × 4.57 m = 16.7 m². Essential for furniture shopping with metric dimensions.
42.195 × 0.62137 = 26.219 miles. Runners training with km-based apps need this for US race registrations.
6.7 × 2.54 = 17.02 cm diagonal. Phone/TV screens are measured in inches globally but specifications often list both.
Frequently Asked Questions
Exactly 2.54 cm. This is a defined (not measured) value — 1 inch is defined as exactly 25.4 millimeters since 1959.
1 meter = 3.28084 feet, or approximately 3 feet 3.37 inches. For quick estimation: 1 meter is slightly more than 3 feet 3 inches.
Convert everything to inches first (feet × 12 + remaining inches), then multiply total inches by 2.54. Example: 5'8" = 68 inches × 2.54 = 172.72 cm.
A statute mile = 1.609 km (used for roads). A nautical mile = 1.852 km (used in aviation and maritime navigation). A nautical mile is about 15% longer than a statute mile.
Yes, completely free with no account, no sign-up, and no limits. Convert as many values as you need across all 30+ supported units.
Who Uses This Tool?
Architects and engineers converting between imperial blueprints and metric specifications. Students solving physics problems requiring unit conversion. Travelers converting road signs between miles and kilometers. Online shoppers comparing product dimensions listed in different units. Fitness enthusiasts converting running distances between km and miles. Tailors converting body measurements between inches and centimeters for international sizing charts.