REM to PX Converter & Conversion Tables [Online Calculator]

Q: How do I convert REM to PX in CSS?

To convert REM to PX, multiply the REM value by the root font size (usually 16px ). Example: 1rem × 16 = 16px

Q: What is the default REM base size in CSS?

Most browsers use a default root font size of 16px , meaning 1rem = 16px unless otherwise defined.

Easily convert REM to pixels (PX) with this free online CSS unit converter. Ideal for web designers, developers, and digital creators, this calculator ensures precise scaling for responsive web designs and typography control.

✅ Perfect for scaling typography, spacing, and layout designs in CSS.
✅ Designed to streamline your workflow for fluid and consistent web designs.

Start Converting Now →

REM to PX Conversion Calculator

REM to PX Converter

Enter your REM value below to instantly convert it to PX.

REM Value: Pixel (PX) Value:

Input Field → Enter REM Value
Convert Button → Instantly Calculate PX Value
Copy Button → One-click copy for easy use in CSS code
Reset Button → Clear your inputs with one click

Example Calculation:

1rem = 16px

REM to PX Conversion Table

REM	PX
0.5rem	8px
0.625rem	10px
0.75rem	12px
0.875rem	14px
1rem	16px
1.25rem	20px
1.5rem	24px
2rem	32px
3rem	48px
4rem	64px

Use this table for common conversions in CSS for better typography scaling.

How to Use the REM to PX Converter?

Step 1: Enter your REM value in the input field.

Step 2: Click the “Convert” button to get the PX value instantly.

Step 3: Use the copy button to grab the calculated PX value for quick use in your CSS code.

Step 4: Reference the conversion table for standard values.

💡 Pro Tip: For accurate scaling, ensure your CSS base font size is set to 16px (default browser setting).

When to Use REM vs PX in CSS?

REM (Root EM)

✅ Preferred for responsive web designs to ensure consistent scaling across devices.
✅ Best used for typography, padding, and margin values in CSS.
✅ Improves accessibility by respecting user-defined browser font sizes.

PX (Pixel)

✅ Best for fixed-size elements where precision is required.
✅ Ideal for borders, small icons, or design elements that shouldn’t scale.

Which One Should You Use?

Use REM for scalable typography and layouts to improve responsiveness.
Use PX for fixed-size elements.

FAQs About REM to PX Conversion

How do I convert REM to PX in CSS?

To convert REM to PX, multiply the REM value by the root font size (usually 16px).
Example: 1rem × 16 = 16px

What is the formula to convert REM to PX?

PX Value = REM Value × Root Font Size

Why should I use PX instead of REM in CSS?

PX is ideal for elements that require precise and fixed sizing, such as borders, small icons, or design elements that shouldn't scale.

What is the default REM base size in CSS?

Most browsers use a default root font size of 16px, meaning 1rem = 16px unless otherwise defined.

Is REM still useful in modern CSS?

Yes! REM is widely used for scalable, accessible designs that adapt well to responsive layouts.

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