Convert tools

PX / REM Converter

Convert pixels and rem units using an explicit root font size.

Convert in your browser · No sign-up

The base must be positive. The default example uses 16 px; actual browser root font sizes may differ.

Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.

How to use

  1. Convert pixels and rem units using an explicit root font size.
  2. Choose the mode or options, then run the tool.
  3. Review the result, then copy or download the TXT file.

Example

24 px ÷ 16 px = 1.5 rem

Details and limitations

The base must be positive. The default example uses 16 px; actual browser root font sizes may differ.

Text stays in your browser; it is not sent to a conversion server.

FAQ

PX / REM Converter — What are the supported inputs and limits?

The base must be positive. The default example uses 16 px; actual browser root font sizes may differ.

Format references

Tool page updated: