Convert em values to pixels (px) or pixels to em instantly. Set a custom parent font size and copy the result in one click. Everything runs in your browser: no login, no installation.
em is a relative unit that treats the element's inherited font size as 1. Give a button 0.75em of padding and the spacing grows along with the text, so the whole component scales with its font size. When you want a single element to grow in proportion to its own font size, em is handier than rem.
Because of this relativity you frequently move a design's px value into em or check it the other way, and this converter does that math for you. Set the parent font size to your real value for an accurate result.
em's most common pitfall is compounding when nested. Since em is based on the parent's font size, using em inside an element that itself sets its font size in em multiplies the ancestors' ratios, so it ends up larger or smaller than expected. For example, 1.2em nested three levels deep is actually 1.2 × 1.2 × 1.2 ≈ 1.73×.
That's why it helps to see the resulting px value directly. When you need predictable values, consider rem, which is relative to the root. All calculation runs in your browser.
What it is, who it's for, how it works and why you'd use it.
Em to Px Converter is a tool that instantly converts CSS em values to pixels (px) and back.
It is for front-end developers working with nested font sizes and those who need to switch between em and pixel values in CSS.
Enter an em or px value and set the parent element's font size; the conversion result appears instantly in your browser.
em values depend on the parent element's font size, making manual calculation tedious: this tool gives you the answer instantly.