Length Converter
Convert distance and length measurements across metric, US customary, and microscale units with high precision.
Run tool
This online length converter transforms distance measurements across metric, US customary, and microscale units. Whether converting project dimensions from inches to centimeters, calculating route distances between miles and kilometers, or adjusting scientific measurements using micrometers and nanometers, the tool processes your input instantly. You can select source and target units from eleven supported measurements: millimeters, centimeters, meters, kilometers, micrometers, nanometers, inches, feet, yards, miles, and nautical miles. If no number is provided, the tool defaults to zero. The default configuration sets meters as the source unit and feet as the target unit. Calculated results display rounded up to ten decimal places to preserve precision across both large land distances and tiny microscopic scales. Use the interactive menus to select your units, enter any positive or negative number, and review the exact converted value in the result panel.
Instructions
- Enter the numerical distance or length in the value field, or leave it at zero.
- Choose your starting measurement unit from the source unit menu.
- Select the desired target measurement unit from the destination unit menu.
- Click the Run button to compute the conversion and display the output value.
Examples
- Converting 10 meters to feet produces 32.8083989501 feet.
- Converting 5 miles to kilometers produces 8.04672 kilometers.
- Converting 500 nanometers to micrometers produces 0.5 micrometers.
FAQ
Which length units can I convert between?
The converter supports millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, nautical miles, micrometers, and nanometers.
What happens if I do not enter a value?
The tool uses an input default of 0 when the value field is left empty.
How precise is the conversion output?
Calculated values are rounded to ten decimal places.
What are the default conversion units?
The default starting unit is meters and the default target unit is feet.