Pixels to REM Converter
Convert pixels to rem units using the root font size.
How to use Pixels to REM Converter
1. Enter Pixels, Root Font Size. 2. All font sizes are entered numeric pixels. Root font size is not read from a page. This is a numeric conversion and does not change styles. 3. Select Convert or press Enter. 4. Select Copy result to copy the answer, or Reset to clear the form and result.
Why use this tool?
All font sizes are entered numeric pixels. Root font size is not read from a page. This is a numeric conversion and does not change styles.
How the calculation works
REM = entered pixels ÷ positive root font pixels. All font sizes are entered numeric pixels. Root font size is not read from a page. This is a numeric conversion and does not change styles. Counts and dimensions use the declared rounding convention; other numbers display up to three decimal places where applicable. Nonzero subsecond durations are labelled. Durations round to the nearest second; nonzero subsecond durations are labelled. File-size output units are decimal. Changing an input label does not convert filled values.
Example
Worked example: Pixels = 24; Root Font Size = 16. Result: 1.5rem.
Practical tip
Check the input labels and assumptions against the pixels to rem task before reusing the number.
Frequently asked questions
What exactly does Pixels to REM Converter calculate?
REM = entered pixels ÷ positive root font pixels.
Which units or counting rules apply?
All font sizes are entered numeric pixels. Root font size is not read from a page. This is a numeric conversion and does not change styles.
Does this inspect, change or upload my files?
This page calculates the entered values or text in the browser. Numeric image/media tools do not transform files. Check the worked example and stated counting basis; the result does not certify device, search-engine or accessibility outcomes.