REM to EM Converter & Conversion Tables [Online Calculator]

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

To convert REM to EM, use this formula: EM Value = REM Value × (Base Font Size ÷ Parent Font Size) . Example: 1.5rem × (16 ÷ 16) = 1.5em .

Q: What is the standard base font size for REM to EM conversion?

Most designs use 16px as the standard base font size in CSS.

Easily convert REM to EM with this free online CSS unit converter. Ideal for web designers, developers, and UI/UX professionals, this calculator ensures precise scaling for responsive typography, spacing, and layout consistency.

✅ Perfect for scaling text and spacing relative to the parent element.
✅ Designed to simplify responsive web design with improved flexibility.

Start Converting Now →

REM to EM Conversion Calculator

REM to EM Converter

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

REM Value: Base Font Size (default 16px): EM Value:

Input Field → Enter REM Value
Base Font Size Input → Enter Base Font Size (default: 16px)
Convert Button → Instantly Calculate EM Value
Copy Button → One-click copy for easy use in CSS code
Reset Button → Clear your inputs with one click

Example Calculation:

1.5rem with a base font size of 16px = 1.5em

REM to EM Conversion Table (Based on 16px Base Font Size)

REM	EM
0.5rem	0.5em
0.75rem	0.75em
1rem	1em
1.5rem	1.5em
2rem	2em
3rem	3em
4rem	4em
5rem	5em
6rem	6em
10rem	10em

Use this table for common conversions in CSS for better scalability.

How to Use the REM to EM Converter?

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

Step 2: Enter your desired base font size (default: 16px).

Step 3: Click the “Convert” button to get the EM value instantly.

Step 4: Use the copy button to grab the calculated EM value for quick use in your CSS code.

Step 5: Reference the conversion table for standard values.

💡 Pro Tip: For accurate scaling, ensure your base font size matches your project’s root <html> font size.

When to Use REM vs EM in CSS?

REM (Root EM)

✅ Preferred for scalable typography with a consistent root size.
✅ Best used for global text sizing, padding, and margins.

EM (Element Relative Measurement)

✅ Ideal for elements that should scale relative to their parent container.
✅ Useful for nested elements with adaptable designs.

Which One Should You Use?

Use REM for consistent sizing across the entire website.
Use EM for dynamic, relative scaling within parent containers.

FAQs About REM to EM Conversion

How do I convert REM to EM in CSS?

To convert REM to EM, use this formula: EM Value = REM Value × (Base Font Size ÷ Parent Font Size). Example: 1.5rem × (16 ÷ 16) = 1.5em.

What is the formula to convert REM to EM?

EM Value = REM Value × (Base Font Size ÷ Parent Font Size)

Why should I use EM instead of REM in CSS?

EM is ideal for components inside containers that need to scale with their parent element.

What is the standard base font size for REM to EM conversion?

Most designs use 16px as the standard base font size in CSS.

Is REM better for consistent text sizes in modern CSS?

Yes! REM ensures consistent scaling across your entire design, improving maintainability.

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