What is equal to 100 rem?

In web design, understanding CSS units is crucial for creating responsive and accessible layouts. One commonly used unit is the rem, which stands for “root em.” This article will explore what 100 rem is equal to in pixels, its practical applications, and why using rem units can benefit your web design projects.

Understanding the rem Unit

The rem unit is a relative unit of measurement in CSS that is based on the root element’s font size. Unlike the em unit, which is relative to the font size of its parent element, rem is always relative to the root (html) element’s font size.

Default Font Size

Most browsers set the default font size for the root (html) element to 16 pixels. This means:

• 1 rem = 16 pixels

To determine how much 100 rem is, you simply multiply the rem value by the root element’s font size.

Calculating 100 rem in Pixels

Using the default font size:

• 1 rem = 16 pixels
• 100 rem = 100 * 16 pixels = 1600 pixels

Therefore, 100 rem equals 1600 pixels by default.

To convert px to rem, click here rem to px.

Custom Root Font Size

If you modify the root font size in your CSS, the value of 100 rem will change accordingly. For instance, if you set the root element’s font size to 20 pixels:

Then:

• 1 rem = 20 pixels
• 100 rem = 100 * 20 pixels = 2000 pixels

Practical Applications

1. Responsive Typography

Using rem units for font sizes ensures that your text scales consistently across different devices and screen sizes. For example, setting large text elements using rem units ensures proportional scaling relative to the root font size:

This approach helps maintain readability and visual hierarchy across different screen sizes.

2. Large-Scale Elements

In web design, there are instances where you might need to define large-scale elements, such as banners, backgrounds, or containers. Using rem units ensures these elements scale proportionally:

3. Accessibility

By using rem units, you respect user preferences for font size adjustments in their browsers. This practice enhances accessibility, allowing users to interact with your content comfortably regardless of their device settings.

Tools for Conversion

Several online tools and browser extensions can help you convert rem to pixels and vice versa. These tools are particularly useful when working with custom root font sizes.

Conclusion

100 rem is equal to 1600 pixels by default, assuming the root element’s font size is 16 pixels. Understanding and using rem units can greatly benefit your web design projects by ensuring consistent, scalable, and accessible layouts. By leveraging the flexibility of rem units, you can create responsive designs that adapt seamlessly to different devices and user settings.