Formula and method
The rem To px Converter converts values between Root EM (rem) and Pixel (px).
Conversion factor: 1 Root EM (rem) = 16 Pixel (px).
Typography and screen CSS conversions convert screen display units (pixels, points, rem, em) for web design and desktop publishing.
Examples
- Convert rem to px instantly.
- Swap units or choose another unit from the same group.
- Example: 1 rem converts to 16 px.
- CSS typography uses px (device-independent pixels, 96/inch), rem (root-relative: 1rem = 16px by default), em (parent-relative), pt (print points: 1pt = 4/3 px at 96dpi), and % (percentage of parent). Rem is preferred for accessibility because it scales with user browser font-size preferences.
Understanding Root EM to Pixel Conversion
Converting values from Root EM (rem) to Pixel (px) is a unit transformation in the typography measurement system. 1 Root EM (rem) equals exactly 16 Pixel (px).
Real-world applications: At the default 16px root: 1.5rem = 24px, 2rem = 32px, 0.875rem = 14px, 0.75rem = 12px. Design tools (Figma, Sketch) work in px; CSS should use rem for accessibility — the user's browser font-size preference scales rem but not px, making rem the correct choice for body text.
When this conversion matters: CSS typography uses px (device-independent pixels, 96/inch), rem (root-relative: 1rem = 16px by default), em (parent-relative), pt (print points: 1pt = 4/3 px at 96dpi), and % (percentage of parent). Rem is preferred for accessibility because it scales with user browser font-size preferences.
Precision & standards: Typography and screen CSS conversions convert screen display units (pixels, points, rem, em) for web design and desktop publishing. SpecWhale uses official SI and imperial conversion factors, computed with 64-bit IEEE 754 floating-point arithmetic entirely in your browser — no data is sent to any external server.
rem To px Converter quick reference table
Common rem amounts converted to px, generated from the exact formula above so every row matches the live calculator.
| rem | px |
|---|---|
| 1 rem | 16 px |
| 2 rem | 32 px |
| 5 rem | 80 px |
| 10 rem | 160 px |
| 25 rem | 400 px |
| 50 rem | 800 px |
| 100 rem | 1,600 px |
| 500 rem | 8,000 px |
| 1,000 rem | 16,000 px |
Convert rem to other units
- px To rem Converter -- the reverse direction of this page.
- rem To em Converter
- rem To pt Converter
- rem To pc Converter
- rem To % Converter
- rem To css-in Converter
- rem To css-mm Converter
Embed this tool
Paste this snippet into your own site or blog post to embed a live, working copy of this tool. It links back to the full page on CalcuSpec.
Frequently asked questions
How do I convert rem to px with rem To px Converter?
To convert rem to px, enter your value into the input field above. CalcuSpec applies standard international unit conversion factors instantly as you type.
Is the rem To px Converter calculation exact and standardized?
Yes, conversions on CalcuSpec use official international standard conversion factors (SI/Imperial) and compute locally in your browser with floating-point precision.
Does this typography converter require server communication?
No. All calculations run entirely inside your browser using client-side JavaScript. No data is sent to an external server or stored anywhere.
Is rem To px Converter free to use?
Yes. rem To px Converter is completely free, has no usage limit, and does not require an account, email, or API key.
What is the formula to convert Root EM (rem) to Pixel (px)?
1 Root EM (rem) = 16 Pixel (px). Multiply any Root EM value by 16 to calculate Pixel.
Does rem To px Converter store or upload my data?
No. rem To px Converter calculates everything locally in your browser. Nothing you type is sent to a server or stored by SpecWhale.
How accurate is rem To px Converter?
rem To px Converter uses fixed, standard conversion ratios and rounds the displayed result. The underlying math does not change, so the same input always gives the same output.
Can I embed rem To px Converter on my own website?
Yes. Use the "Embed this tool" snippet on this page to add a free, working copy of rem To px Converter to your own blog post or page.