Convert metric and imperial units

Students, tradespeople and travelers use it when a length must be expressed in a different metric or imperial unit.

Convert metric and imperial units. Everything runs in your browser, so the values you enter are never uploaded, shared, or stored.

How to use

Enter the numeric value to convert, without adding a unit symbol inside the number field.
Choose the starting unit from the available metric or imperial options.
Select the target unit in which you want the length to be expressed.
Run the conversion to display the equivalent value in the chosen unit.
Read the result and confirm that both selected units match your actual need.

Example

The sample converts a length of ten centimeters into inches. After conversion, check that the target unit is respected and that the displayed value falls in a sensible range for that measurement.

Input

10
cm
in

Output

10 cm = 3.93700787402 in

Limits and formats

This page converts lengths only; it does not handle areas, volumes, or weights.
You need a valid number and two different units to get a clear result.
Displayed rounding can hide small decimals; keep more precision for technical work.
Imported files need to contain a readable value and units, even if several text formats are accepted.
Double-check a critical conversion with another method or a professional reference.

Where processing happens

The conversion runs locally in your browser. The number and units you enter stay on your device and are not sent to any external service. You can therefore check a measurement quickly without creating an account or leaving a stored record.

Frequently asked questions

Which units can I use?

The input placeholder lists millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles. These cover the most common metric and imperial length conversions.

Why does the result have many decimals?

An exact conversion between metric and imperial units often produces a long decimal. The display may round it, but you can keep more digits when your work requires greater precision.

Can I convert square feet?

No, this tool handles simple lengths only. Square feet measure area and require a different converter or a calculation using two dimensions.