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Font-Size Clamp() Generator Free

Create a Font Size Transition with
clamp() Function in a Linear Scale.


Generates Font-Size Clamp


How do I generate?


How to Use Font-Size Clamp() Generator

Input the min and max Font sizes and viewport widths.

  1. Min Viewport. This is the smallest screen size you’re designing for. Usually, it’s a mobile device.
  2. Max Viewport. This is the largest screen size, like a desktop.
  3. Min Font Size. The smallest font size you want to display.
  4. Max Font Size. The largest font size for your design.

The calculator will automatically do the magic!


That’s it?


That’s it!

You can input the values in both PX or REM, by just switching the toggles. Or you can mix them up as you like, the calculations still work!



In that example it gave you the pure clamp.

What if I want the full CSS line?


Sure, just hit the “Copy Clamp” button and you got it.



What Is Font Size Clamp

Font Size Clamp Formula

font-size = clamp(minimum-font-size, viewport-width * multiplier, maximum-font-size);

For example, to set the font size to 16px on small screens below 360px, and 22px on large screens above 1280px wide, you would use the following code:

font-size: clamp(1rem, 0.8533rem + 0.6522vw, 1.38rem);

The Font Size Clamp() function takes three arguments:
The minimum font size, The viewport width & The maximum font size…

The viewport width is the width of the user’s screen in pixels. The multiplier is a number that determines how much the font size changes as the viewport width increases. In the example above, the multiplier is 0.6522, which means that the font size will increase by 65.22% for every 100 pixels that the viewport width increases.

The formula takes these three factors and calculates the perfect font size for any given screen. It’s like having a personal stylist for your website, making sure the text always looks its best.

Fluid Typography

Fluid Typography is the art of making your text flow like water. It’s not rigid; it adapts and changes shape to fit its container. With Font Size Clamp, fluid typography becomes a breeze.

Imagine your text as a liquid that fills up a glass. On a small screen, the glass is small, so the text adjusts. On a larger screen, the glass grows, and so does the text. Fluid typography ensures that your text always fits perfectly, no matter the container’s size.

Why Use Font Size Clamp in Responsive Design?

  • Consistency. Your text will have a uniform appearance across devices.
  • Readability. No more struggling to read tiny text on a mobile screen.
  • Aesthetics. Your site will look professional and polished.
  • Ease of Use. With tools like Font-Size Clamp() Generator, implementation is a breeze.

Clamp() on Other Things?