How CSS & Print Typography Converter (px, rem, em, pt) Works & When to Use It
Convert web and print font sizes between Pixels (px), Root EM (rem), Points (pt — 1 pt = 1.333 px at 96 DPI), and Percentage (%) based on your root font size. Calculations and file processing run in this browser tab. The tool does not send working inputs or files to our hosting server.
Step-by-Step Instructions
- Enter the labelled values or choose an example.
- Run the tool and review the result and its assumptions.
- Copy or download the result. Reset restores defaults; Undo restores the previous settings.
Worked Examples
| Scenario | Input Parameters | Example Output |
|---|---|---|
| 18px at 16px Base (1.125 rem / 13.5 pt) | {"pxValue": 18, "baseFontPx": 16} |
18px = 1.125rem = 13.5pt = 112.5% |
| 24px Heading at 16px Base (1.5 rem / 18 pt) | {"pxValue": 24, "baseFontPx": 16} |
24px = 1.5rem = 18pt = 150% |
Formula, reference and effective date
- Reference Standard / Authority: W3C CSS Values and Units Module Level 4 (96 CSS px = 1 inch = 72 pt)
- Applicable Period / Effective Date: 2025-2026
- Privacy & Execution Mode: Browser-Local Only (Zero Server Upload) (None (Pure Vanilla JS))
Important Limitations & Edge Cases
Default browser root font size is 16px unless overridden in CSS html{font-size}. Check the assumptions and output against your intended task before relying on the result.
Frequently Asked Questions (FAQs)
1. Is CSS & Print Typography Converter (px, rem, em, pt) completely free to use without registration?
Yes. Every tool on Easy Tools Today is 100% free with no paywall, no sign-up, and no subscription required.
2. Are the numbers or files I enter uploaded to any server?
Calculations and file processing run in this browser tab. The tool does not send working inputs or files to our hosting server.
3. What should I check before using the result?
Check the assumptions and output against your intended task before relying on the result. Reference: W3C CSS Values and Units Module Level 4 (96 CSS px = 1 inch = 72 pt).