PX to VW Converter
Convert pixel values to viewport width units for truly responsive designs
PX to VW Calculator
VW (viewport width) units are relative to the browser's viewport width. 1vw equals 1% of the viewport width. Enter the current viewport width and the pixel value you want to convert.
Conversion Result
Responsive Comparison
See how this value will scale across different viewport widths:
| Device | Viewport Width | VW Value | Equivalent in Pixels |
|---|
Batch Converter
Convert multiple pixel values at once. Enter values separated by spaces, commas, or new lines.
Batch Results
| Pixels | VW | CSS Code |
|---|
Common Use Cases for VW Units
Viewport Width (VW) units are particularly useful in the following scenarios:
| Use Case | Typical VW Values | CSS Example |
|---|---|---|
| Responsive Typography | 2vw - 5vw | h1 { font-size: 4vw; } |
| Full-Width Containers | 100vw | .full-width { width: 100vw; } |
| Responsive Padding | 2vw - 5vw | .container { padding: 3vw; } |
| Hero Sections | 50vw - 100vw | .hero { height: 80vw; max-height: 600px; } |
| Fluid Margins | 1vw - 10vw | .section { margin: 5vw 0; } |
| Fluid Grid Layout | 20vw - 33vw | .card { width: 25vw; } |
| Responsive Images | 50vw - 100vw | img { max-width: 60vw; } |
Frequently Asked Questions
The main difference between VW (viewport width) units and percentage units is what they're relative to:
- VW units are always relative to the viewport width (browser window size), regardless of parent elements.
- Percentage units are relative to their parent container's width.
For example:
- 50vw is always 50% of the viewport width, no matter where the element is placed in the DOM.
- An element with width: 50% will be 50% of its parent container's width, which might be narrower than the viewport.
VW units are particularly useful for creating elements that are consistently sized relative to the screen width, regardless of their container hierarchy.
VW units are best used in the following scenarios:
- Fluid Typography - Creating text that scales smoothly with the viewport width, ensuring readability across all devices.
- Full-Width Elements - Creating elements that span the entire viewport width, regardless of parent containers.
- Consistent Proportional Sizing - When elements need to maintain the same proportion relative to the screen width across all devices.
- Viewport-Based Layouts - For layouts that are directly tied to the viewport dimensions rather than container dimensions.
- Creating Immersive Experiences - For full-screen or edge-to-edge designs that need to respond directly to viewport size.
VW units may not be ideal for:
- Elements within narrow containers where you want sizing relative to the container.
- Text sizes without minimum or maximum constraints (can become too small on mobile or too large on desktop).
- When you need precise control at specific breakpoints (media queries with other units may work better).
To calculate a VW value manually, use this formula:
For example, if you want an element to be 150px wide on a 1366px viewport:
VW = (150 ÷ 1366) x 100 = 10.98vw
This means the element will be exactly 150px wide on a 1366px viewport, but will scale proportionally on other viewport sizes:
- On a 1920px viewport: 10.98vw = 210.82px
- On a 768px viewport: 10.98vw = 84.33px
- On a 375px viewport: 10.98vw = 41.18px
For fluid typography, consider using the calc() function with a combination of fixed units and vw to set minimum and maximum sizes.
Here are some best practices for effectively using VW units in your designs:
- Set Minimum and Maximum Sizes - Use calc() to prevent text or elements from becoming too small on mobile or too large on wide screens.
font-size: calc(16px + 1vw); - Use VW for Proportional Spacing - VW units are great for consistent margins and padding that scale with the viewport.
padding: 3vw 5vw; - Create Fluid Typography with Clamp - The clamp() function lets you set minimum, preferred, and maximum sizes.
font-size: clamp(16px, 3vw, 32px); - Consider Screen Reader Users - Ensure text remains readable when users zoom in (avoid fixed VW units without minimums).
font-size: max(16px, 2vw); - Test Across Different Devices - Always test how VW-based layouts behave at various viewport sizes, including very small and very large screens.
Be cautious when using 100vw for widths as it can cause horizontal scrollbars if the page has a vertical scrollbar (which takes up space in the viewport). Consider using width: 100%; or width: 100dvw; (dynamic viewport width) instead.
About VW Units
VW (Viewport Width) units are relative values that represent a percentage of the browser's viewport width. 1vw equals 1% of the viewport width, making them ideal for truly responsive designs.
Benefits of VW Units
-
True Responsiveness: Elements scale directly with viewport
-
Viewport Independence: Not affected by parent container sizes
-
Fluid Typography: Text that scales perfectly with screen size
-
Consistent Proportions: Maintains design ratios across all devices
VW is part of a family of viewport units that includes vh (viewport height), vmin (minimum of vw and vh), and vmax (maximum of vw and vh).
CSS Usage Examples
Common ways to use VW units in your CSS:
/* Fluid typography */
h1 {
font-size: 5vw; /* Scales with viewport */
/* Better approach with constraints */
font-size: clamp(28px, 5vw, 72px);
}
/* Full-width elements */
.hero-banner {
width: 100vw;
margin-left: calc(-50vw + 50%);
}
/* Fluid padding and spacing */
.section {
padding: 5vw;
}
/* Combined with other units */
.card {
margin-bottom: calc(16px + 2vw);
}
/* Advanced fluid typography */
body {
font-size: calc(16px + 0.5vw);
}
/* Responsive width constraints */
.container {
width: 80vw;
max-width: 1200px;
}The most powerful use of VW units is in combination with calc(), clamp(), min(), and max() to create constraints while maintaining fluidity.