When the message of your next presentation is clear, the one thing that shouldn't be holding you back from sending across your message is typography, or font size.

The difference between designs that stand out on the web and the ones that don't is simple. The ones that stand out have the right font size, font style, and line height. But, how do you know what works and what doesn't?

Here, we'll take a look at six font size calculators you can use to help.

1. Golden Ratio Typography (GRT) Calculator

screen of GRT calculator

Being a design system calculator, the Golden Ratio Typography (GRT) Calculator not only helps you discover the perfect typography for your website, but also provides the foundational elements you'll need for every project.

You can enter your current font, font size, and content width to determine the right typography you require for the website.

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You can experiment with new fonts and sizes on any device available, and you'll be able to send better messages to your audience out there. Because, let's face it: font size and style does matter.

2. A Visual Type Scale

a view of type scale calculator

Developed by Jeremy Church, A Visual Type Scale is a type tool that helps you develop responsive sites for mobile apps, desktop apps, desktop sites, and other works like portfolios.

It helps improve typography on the web, and makes sure that your REM value is relative to font-size, which you'll need for any CSS. You'll also find additional resources here, like a PX to EM conversion tool and free font and web fonts generator.

3. Leserlich Font Size Calculator

a view of leserlich font size calculator

You can use the Leserlich Font Size Calculator to calculate and test easily accessible font sizes in smartphones, books, magazines, tablets, desktop screens, posters, and signs.

Another advantage of using this font size calculator is how it helps you identify inclusive font sizes that are compliant with German DIN 1450.

Offered by the German Federation of the Blind and Partially Sighted, this font size calculator is an attempt to make the web a much more inclusive place.

4. A Typographic Scale Calculator

a screen of typographic scale calculator

This font size calculator is unique in the way it helps you find the right font size match from a harmonious type scale that has been inspired by the ways of music.

Choosing a font size from a modular scale is important because it is essential for maintaining consistency and contrast in a typographic work.

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That's because certain proportions and sizes appeal to our eyes in the same way music appeals to our audible sensibilities. You can assign different typographic elements like title, subtitle, and legend to send better messages and create responsive sites.

5. Gridlover

view of gridlover

If you're a designer, you must know about this fantastic tool called Gridlover that makes your design look harmonious and well-balanced.

You'll be able to craft brilliantly looking designs and choose the right font size, line height, and scale factor sliders for your job. Another thing you'd love about Gridlover is its interface. It loads instantly, and is completely free.

6. Modular Scale

a view of modular scale calculator

You can use this calculator as a plugin, or right on the web, to get results that are accurate. It works by creating a set of numbers on the scale calculator that can be used like a ruler.

You'll need to enter the base size and scale ratio to get the visual results of which typography works the best for your project.

Made originally for web designers to help them size their type in a meaningful way, this site works wonders for anyone who's trying to find the right typography.

Selecting the Correct Font Size is Easy

Good design has everything to do with the right font size. As a designer, it is often difficult to find the correct font size and style. The six font size calculators make it an easy affair.

They are all very useful, and will give you a host of smoother sizing options for your font. Choose one that fits best with your needs and helps you create aesthetically pleasing and consistent designs.