Length Converter

The Length Converter instantly converts between metric, imperial, and astronomical distance units. Whether measuring millimeters or light-years, this tool provides accurate conversions with intuitive real-world comparisons to help you visualize any distance.

How to Use This Length Converter

1. Enter a value: Type any number in the input field
2. Select your unit: Choose the source unit from the dropdown
3. View all conversions: See instant results in 12+ different units
4. Explore the scale: The visual scale shows where your measurement falls from atomic to cosmic

Supported Length Units

Metric Units

• Kilometer (km): 1,000 meters. Used for road distances and geographic measurements.
• Meter (m): The SI base unit of length. Standard for scientific measurements.
• Centimeter (cm): 1/100 of a meter. Common for body measurements.
• Millimeter (mm): 1/1,000 of a meter. Used for precision engineering.

Imperial Units

• Mile (mi): 5,280 feet. Used for road distances in US and UK.
• Yard (yd): 3 feet or 36 inches. Used in fabric and sports.
• Foot (ft): 12 inches. Common for height and room dimensions.
• Inch (in): 2.54 cm exactly. Used for screen sizes.

Astronomical Units

• Nautical Mile (nmi): 1,852 meters. Used in maritime navigation.
• Astronomical Unit (AU): Average Earth-Sun distance (~150 million km).
• Light-year (ly): Distance light travels in one year (~9.46 trillion km).

Common Conversion Formulas

Conversion Reference Table

Frequently Asked Questions

How many feet are in a meter?

There are approximately 3.28084 feet in 1 meter.

What is a light-year?

A light-year is the distance light travels in one year in vacuum, approximately 9.461 trillion kilometers or 5.879 trillion miles. It is used to measure astronomical distances.

How accurate are these conversions?

Our conversions use internationally standardized conversion factors and provide results with high precision.

Additional Resources

• Meter - Wikipedia
• Light-year - Wikipedia