Life Calculator
Understand the numbers · Make life easier

Length conversion

Convert a measured length between metric and customary units. Keep the same physical dimension when comparing a space with furniture.

Start with your own numbers

Editable example

An example is filled in. Replace it with your own data to calculate.

Enter the original length, then select the source and destination units.

Enter length value, for example 200. Use the displayed unit; replace the example with your own value.
Choose from unit. Check the selected option before entering the remaining values.
Choose to unit. Check the selected option before entering the remaining values.

Results update when inputs are complete. A plan is kept only when you save it. Inputs and results are not uploaded.

Saved plans →

Saved in this browser. Before changing devices, export a backup from My tools.

Example result

Converted result

78.74in

For example, 200 cm can be converted to meters or inches. Conversion does not change the actual length.

One Taiwan jin is 600 g; one Taiwan ping is 400/121 m². Imperial lengths use standard conversions.

Method and scope

Fixed unit factors connect each length through metres. One inch is exactly 2.54 cm and one foot contains 12 inches.

Use the converted dimension to compare like measurements. An outside width should not be mistaken for an inside opening.

The tool does not add installation tolerance or account for doors, handles or a delivery route. Confirm whether your source measurement is external, internal or usable clearance.

References:NIST standard unit conversions、NIST: SI conversion factors

What this helps you do

Convert a measured length between metric and customary units. Keep the same physical dimension when comparing a space with furniture.

What to enter

Start with length value, then fill the other relevant fields in the units shown. The field hints explain the required format and examples.

How the calculation works

Fixed unit factors connect each length through metres. One inch is exactly 2.54 cm and one foot contains 12 inches.

Worked example

A 200 cm cabinet is 2 m long, or about 78.7402 inches. Conversion changes the number and unit, not the actual length.

Understanding the answer

Use the converted dimension to compare like measurements. An outside width should not be mistaken for an inside opening.

Scope and limitations

The tool does not add installation tolerance or account for doors, handles or a delivery route. Confirm whether your source measurement is external, internal or usable clearance.

Keep it handy for next time

Add Length conversion to your home screen

This icon opens this tool. Confirm installation in your browser.

  1. iPhone: Open in Safari, tap Share → Add to Home Screen, then confirm.
  2. Android: Open in Chrome and choose Install app or Add to Home screen from the menu.
  3. In an in-app browser such as LINE or Facebook, use its menu to open the page in Safari or Chrome first.

Browser options vary. A shortcut does not provide cross-device synchronization, and an installed app may have separate storage. Export a backup from My tools first. The first load requires a connection.

Checking offline data.