Font Size Converter – Convert PX, PT, EM, REM, %, VW, VH, CM, MM, IN & PC Instantly
Typography is one of the most important elements in web design, graphic design, publishing, and print media. Whether you’re building a website, creating a document, designing a presentation, or preparing files for printing, understanding font size units and converting between them accurately is essential. A Font Size Converter makes it easy to convert font sizes instantly between pixels (px), points (pt), em, rem, percentages, viewport units, and physical measurement units like centimeters and inches.
This free tool helps web developers, UI designers, graphic artists, publishers, and students convert font sizes accurately without performing manual calculations. Simply enter a value, choose the source unit and target unit, and get instant results.
Based on common typography standards used in web development, responsive design, and print publishing, this converter helps ensure consistency across screens, devices, browsers, and printed materials.
What Is a Font Size Converter?
A Font Size Converter is an online tool that converts one font measurement unit into another. Since different design systems and applications use different units, conversion helps maintain consistent typography.
For example, you may want to:
- Convert px to rem for responsive web design.
- Convert pt to px for screen typography.
- Convert percentages to em values.
- Convert viewport units to pixels.
- Convert inches or centimeters to points for print design.
Instead of calculating manually, the converter performs the calculations instantly and accurately.
Why Font Size Units Matter
Different platforms use different units for text sizing. Websites often use pixels, rem, or em, while print software uses points and physical measurements.
Choosing the right unit improves:
- Accessibility
- Responsive design
- Cross-device compatibility
- Readability
- SEO and user experience
- Print accuracy
- Scalability
Professional designers and developers regularly convert font sizes to maintain visual consistency.
Common Font Size Units Explained
Pixels (PX)
Pixels are the most widely used font unit for websites and digital interfaces.
Examples:
- 12px
- 14px
- 16px
- 18px
- 24px
Most browsers use 16px as the default font size.
Points (PT)
Points are commonly used in print design and word processing applications like Microsoft Word and Adobe InDesign.
Examples:
- 10pt
- 11pt
- 12pt
- 14pt
- 18pt
One point equals 1/72 of an inch.
EM
EM units are relative to the font size of their parent element.
Benefits include:
- Responsive typography
- Scalable layouts
- Flexible design systems
Example:
1em equals the current parent font size.
REM
REM stands for Root EM and is based on the root HTML font size.
Developers commonly use REM because it provides:
- Accessibility
- Consistency
- Easy scaling
- Responsive layouts
Examples:
- 1rem = 16px
- 1.5rem = 24px
- 2rem = 32px
Percentage (%)
Percentage values scale text relative to the parent element.
Examples:
- 100%
- 125%
- 150%
- 200%
Viewport Width (VW)
VW units are based on the browser width.
1vw equals 1% of the viewport width.
VW units are commonly used for:
- Responsive headings
- Hero sections
- Fluid typography
Viewport Height (VH)
VH units are based on viewport height.
1vh equals 1% of screen height.
They are useful for responsive layouts and full-screen designs.
Centimeters (CM)
Centimeters are often used in printing and physical layout design.
Examples include:
- Magazine layouts
- Posters
- Packaging designs
Millimeters (MM)
Millimeters provide higher precision than centimeters and are commonly used in professional printing.
Inches (IN)
Inches are widely used in printing and publishing applications.
One inch equals 72 points.
Picas (PC)
Picas are traditional publishing units used in typography and printing.
1 pica equals 12 points.
Most Common Font Size Conversions
PX to REM Converter
| Pixels | REM |
|---|---|
| 12px | 0.75rem |
| 14px | 0.875rem |
| 16px | 1rem |
| 18px | 1.125rem |
| 20px | 1.25rem |
| 24px | 1.5rem |
| 32px | 2rem |
PT to PX Conversion
| Points | Pixels |
|---|---|
| 10pt | 13px |
| 11pt | 15px |
| 12pt | 16px |
| 14pt | 19px |
| 18pt | 24px |
| 24pt | 32px |
Why Web Developers Use REM Instead of PX
Modern websites increasingly use REM units because they improve accessibility and responsiveness.
Benefits of REM
- Better accessibility.
- Responsive scaling.
- Easier maintenance.
- Consistent layouts.
- User-controlled browser settings support.
Most CSS frameworks such as Bootstrap and Tailwind rely heavily on REM values.
Using Viewport Units for Responsive Typography
Viewport units allow text to scale based on screen size.
Examples:
font-size: 5vw; font-size: 3vh;
This approach creates fluid typography that adapts automatically to mobile devices, tablets, and desktops.
Physical Measurement Conversion for Print Designers
Print professionals often need to convert:
- PT to inches
- CM to points
- MM to picas
- Inches to pixels
The Font Size Converter simplifies these conversions and helps maintain precision in print layouts.
How to Use the Font Size Converter
Step 1: Enter Font Size
Input the size value you want to convert.
Step 2: Select Current Unit
Choose from:
- PX
- PT
- EM
- REM
- %
- VW
- VH
- CM
- MM
- IN
- PC
Step 3: Select Target Unit
Choose the unit you want to convert to.
Step 4: View Instant Results
The tool calculates and displays accurate conversions immediately.
Who Uses Font Size Converters?
- Web developers
- UI designers
- UX professionals
- Graphic designers
- Publishers
- Print designers
- Students
- Content creators
- Bloggers
- Marketing agencies
Practical Applications
Website Development
Convert px to rem and em values for responsive typography.
Graphic Design
Convert points and inches for accurate print dimensions.
Publishing
Use picas and points for magazines and books.
Responsive Design
Use viewport units for fluid text scaling.
Advantages of Using a Font Size Converter
- Fast calculations.
- Accurate conversions.
- Supports multiple units.
- Useful for web and print.
- Improves workflow.
- Reduces manual errors.
- Works instantly online.
Frequently Asked Questions
How many pixels are in 1 rem?
By default, 1rem equals 16 pixels in most browsers.
What is the difference between EM and REM?
EM depends on the parent element, while REM depends on the root HTML element.
Why do developers prefer REM?
REM improves accessibility and provides consistent scaling across websites.
What unit should I use for responsive design?
REM and viewport units (VW and VH) are popular choices for responsive typography.
How many points are in one inch?
One inch equals 72 points.
What is a pica?
A pica is a traditional typography unit equal to 12 points.
Final Thoughts
A Font Size Converter is an essential tool for web developers, graphic designers, publishers, and typography enthusiasts. Whether you’re converting PX, PT, EM, REM, percentages, VW, VH, CM, MM, IN, or PC, accurate unit conversion helps maintain consistency across websites, applications, printed materials, and responsive layouts.
By providing instant and reliable conversions, this tool eliminates manual calculations and helps designers and developers create professional, scalable, and visually consistent typography across all devices and platforms.
