REM to PX Converter - Convert REM to Pixels Instantly
Convert rem to px instantly with this rem to px calculator and rem to px CSS converter. Translate relative units into fixed pixel values for design systems and debugging.
Calculator
Translate REM units back to pixel values instantly.
This rem to px online converter is a rem to px CSS calculator and rem to px tool for fast rem to px calculation results.
REM to PX formula
PX = REM x Base Font Size
Use a base 16 root font size (the default in most browsers) for a quick rem to px base 16 conversion, or adjust the base for custom scales.
Example
1.5rem x 16 = 24px
Conversion table (base 16)
Common rem to px responsive design values using a 16px root font size.
| REM | PX |
|---|---|
| 0.5rem | 8px |
| 1rem | 16px |
| 1.5rem | 24px |
| 2rem | 32px |
| 3rem | 48px |
| 4rem | 64px |
REM to PX FAQ
- What is the rem to px formula?
- The rem to px formula is: px = rem x base font size.
- What is the base 16 root font size?
- Most browsers default to a 16px root font size, so 1rem equals 16px.
- How do I run a rem to px CSS calculation?
- Multiply your rem value by the base font size to get the px value.
- When should I use px instead of rem?
- Use px for hairline borders or fixed-size assets that should not scale with user settings.