Length Converter

Length Converter

Convert length measurements between common units with a reversible conversion.

Your inputs

Calculated in your browser. Your inputs stay on this device.

Starting values are examples. First click or keyboard focus clears an example so you can enter yours. Reset restores the examples.

Your result

Enter your values to calculate.

Compare scenarios

Keep up to three results and their inputs during this visit. Reset clears the comparison.

Behind the answer

Output = input × source factor ÷ destination factor

How to use this converter

Each unit has a fixed factor relative to the family’s base unit. Use Swap units to reverse the direction.

Enter what would you like to convert?, value, from unit and review the remaining options.
Select Calculate or change a value to update the result. Read the result label and units before copying.
Use Reset to restore the worked starting values.

Formula and method

Output = input × source factor ÷ destination factor

US and UK volume units are explicitly distinguished. Display rounding does not change the underlying calculation. Display precision is adjustable from 0–15 decimal places; underlying factors are unchanged.

Worked example

1 meter = 100 centimeters.

Questions about length converter

How many centimeters are in an inch?

One international inch is exactly 2.54 centimeters. For example, 10 inches equals 25.4 centimeters. The display rounds the converted value; the conversion factor itself is not rounded.

Choose the tool for your question

Unit Converters: Browse dedicated area, volume, mass, temperature, and speed tools.

What assumptions should I check?

Are my inputs saved?

Calculations run in your browser. We store only tool IDs for favorites and recent tools. A calculation link contains your inputs only when you explicitly choose to copy one.