VW → EM Converter
Converting from VW to EM is common when switching from helps in making layouts adapt to screen width. to ideal when you need sizing relative to parent elements. in CSS projects.
Conversion Form
About the Unit
VW (Viewport Width): VW is a relative unit based on the width of the viewport (the visible area of the page in the browser). 1vw corresponds to 1% of the viewport width. This unit is extremely useful when you want to create designs that automatically adjust to the screen width, especially in responsive layouts. Using vw units allows you to set element widths that adapt fluidly to the screen size without the need for complicated media queries. For example, if you set an element's width to 50vw, it will occupy half of the screen width, regardless of the screen size or device resolution. This flexibility makes VW ideal for layouts that need to be adaptable, such as websites that work well on both mobile devices and desktops.
Pro Tip: vw → em
Em scales text size, vw scales layout width. Use em for components and vw for layout widths.
Quick Reference: Unit Conversion by Tens
| VW | EM |
|---|---|
| 10vw | 1.92em |
| 20vw | 3.84em |
| 30vw | 5.76em |
| 40vw | 7.68em |
| 50vw | 9.6em |
| 60vw | 11.52em |
| 70vw | 13.44em |
| 80vw | 15.36em |
| 90vw | 17.28em |
| 100vw | 19.2em |
| 110vw | 21.12em |
| 120vw | 23.04em |
| 130vw | 24.96em |
| 140vw | 26.88em |
| 150vw | 28.8em |
| 160vw | 30.72em |
| 170vw | 32.64em |
| 180vw | 34.56em |
| 190vw | 36.48em |
| 200vw | 38.4em |
| 210vw | 40.32em |
| 220vw | 42.24em |
| 230vw | 44.16em |
| 240vw | 46.08em |
| 250vw | 48em |
Live Unit Preview
See how different CSS units affect the size of the box below:
10px
10rem
10em
10%
10vw
10vh
Common Mistake
Em scales text size, vw scales layout width. Use em for components and vw for layout widths.
Real Code Example
/* Mobile-first card with vw → em */
.card {
padding: 0vw; /* undefinedem */
font-size: 1.5rem;
width: min(90vw, 40ch);
}Frequently Asked Questions About VW
When should I use vw instead of vw?
Use vw for elements that scale with screen width.
How many vw is 1vw?
1vw = 1% of the viewport width.
Is vw affected by screen size?
Yes, it changes with browser width.
Is vw good for fonts?
Sometimes, but rem is more consistent.
Keyboard Shortcuts
- Ctrl + C: Convert
- Ctrl + I: Invert units
- Esc: Reset values