This is an online calculator for converting length that offers conversion factors between several widely used length measurement units. 

It is composed of the following common length units: 

• Angstoms
• Astronomical Units
• Barleycoms
• Cables
• Centimeters (cm)
• Chains (Surveyors)
• Decimeters
• Ells (UK)
• Ems (Pica)
• Fathoms
• Feet (UK and US)
• Feet (US Survey)
• Furlongs
• Hands
• Hectometer
• Inches
• Kilometers
• Light years
• Meter
• Micrometers
• Mil
• Miles (UK and US)
• Nanometer
• Parses
• Picometer
• Yards

Note: To reduce the amount of digits, some length conversion factors are rounded, and all length conversion factors are not accurate. 

Furthermore, the country, client, and usage environment can all affect the length conversion factor for a given length unit.