PX to VMAX Converter

Convert pixel values to viewport maximum units for responsive designs that adapt to the largest viewport dimension

PX to VMAX Calculator

About Viewport Maximum Units:

VMAX (viewport maximum) units are relative to the larger dimension of the browser's viewport (either width or height). 1vmax equals 1% of the viewport's larger dimension. Enter your viewport dimensions and the pixel value you want to convert.

px
Most common desktop width is 1366px
px
Most common desktop height is 768px
px
The pixel value you want to convert to VMAX units
Conversion Result
1.5vmax
20px = 1.5vmax
Viewport: 1366px (larger dimension)

Your width (1366px) is larger than your height (768px). Therefore, 1vmax = 1% of 1366px = 13.66px.

Responsive Comparison

See how this value will scale across different device viewports:

Device Dimensions Larger Dimension VMAX Value Equivalent in Pixels

Batch Converter

Convert multiple pixel values at once. Enter values separated by spaces, commas, or new lines.

Batch Results
Pixels VMAX CSS Code

Common Use Cases for VMAX Units

Viewport Maximum (VMAX) units are particularly useful in the following scenarios:

Use Case Typical VMAX Values CSS Example
Responsive Typography 1.5vmax - 3vmax font-size: 2vmax;
Consistent UI Elements 2vmax - 5vmax .button { padding: 1vmax 2vmax; }
Modals and Popups 40vmax - 60vmax .modal { width: 50vmax; }
Scalable Icons 2vmax - 4vmax .icon { width: 3vmax; height: 3vmax; }
Content Containers 70vmax - 90vmax .container { max-width: 80vmax; }
Balanced Margins/Padding 1vmax - 3vmax section { margin: 2vmax; }
Orientation-Agnostic Elements 5vmax - 10vmax .square { width: 8vmax; height: 8vmax; }

Frequently Asked Questions

VMAX and VMIN are both viewport-relative units, but they reference different dimensions of the viewport:

  • VMAX (viewport maximum) is relative to the larger of the viewport's width or height. 1vmax equals 1% of the viewport's larger dimension.
  • VMIN (viewport minimum) is relative to the smaller of the viewport's width or height. 1vmin equals 1% of the viewport's smaller dimension.

Key differences in behavior:

  • On landscape screens (where width > height), 1vmax equals 1vw (viewport width) and 1vmin equals 1vh (viewport height).
  • On portrait screens (where height > width), 1vmax equals 1vh and 1vmin equals 1vw.
  • When the device orientation changes, the reference dimension for vmax and vmin may switch, while vw and vh always reference the same dimension.

VMAX is excellent for creating elements that need to be consistently sized relative to the screen's largest dimension, regardless of orientation.

VMAX is best used in the following scenarios:

  1. Orientation-Independent Sizing - When you need elements to maintain consistent sizing relative to the screen regardless of whether the device is in portrait or landscape mode.
  2. Responsive Typography - Creating font sizes that scale appropriately across all devices and orientations.
  3. Square UI Elements - For elements that need to maintain their proportions regardless of screen orientation.
  4. Consistent Padding/Spacing - When you want spacing to feel consistent across different device orientations.
  5. Maximum Containment - For setting maximum sizes that work well across all viewport configurations.

VW or VH might be better when:

  • You specifically need to reference width (vw) or height (vh) regardless of device orientation.
  • You're creating width-specific or height-specific layouts that shouldn't change with orientation.
  • You need more predictable behavior during orientation changes.
  • Your design requires fitting content to specific dimensions that correspond directly to width or height.

VMAX is particularly valuable for creating "orientation-resilient" designs that maintain their proportional appearance regardless of how the user holds their device.

To calculate a VMAX value manually, follow these steps:

  1. Determine which viewport dimension is larger (width or height)
  2. Apply this formula: VMAX Value = (Target Size in Pixels ÷ Larger Viewport Dimension in Pixels) x 100

Example 1: Landscape viewport (1366x768)

Width (1366px) is larger than height (768px)
To convert 50px to vmax:
VMAX = (50 ÷ 1366) × 100 = 3.66vmax

Example 2: Portrait viewport (375x667)

Height (667px) is larger than width (375px)
To convert a 30px to vmax:
VMAX = (30 ÷ 667) × 100 = 4.5vmax

This means the element will scale differently based on the device orientation:

  • On a 1366x768 viewport: 3.66vmax = 50px
  • On a 375x667 viewport: 3.66vmax = 24.4px

Remember that when a device changes orientation, the reference dimension for VMAX may switch, causing the actual pixel size to change even though the VMAX value remains constant.

While VMAX units are powerful for responsive design, there are some common issues to be aware of:

  • Orientation Changes - Elements using VMAX may resize unexpectedly during orientation changes, as the reference dimension switches from width to height or vice versa.
    /* Use with caution for elements that shouldn't resize dramatically */
  • Extreme Screen Ratios - On devices with unusual aspect ratios (ultrawide monitors or folding phones), VMAX-sized elements might become disproportionately large.
    max-width: min(800px, 80vmax); /* Prevent excessive sizing */
  • Inconsistent Text Sizing - Text sized with VMAX may become too large on certain devices or too small on others, affecting readability.
    font-size: clamp(16px, 2vmax, 24px); /* Set min/max bounds */
  • Unpredictable Scaling - Since VMAX references either width or height depending on which is larger, the scaling behavior can be less predictable than using vw or vh consistently.
    /* Test thoroughly across different devices and orientations */
  • Browser Support Considerations - While viewport units are well-supported, some older browsers might have inconsistent implementation.
    /* Consider fallbacks for critical elements */

Always test designs using VMAX units across various devices, screen sizes, and orientations. Consider using CSS clamp() to set minimum and maximum boundaries for important elements.

About VMAX Units

VMAX (Viewport Maximum) units are relative values that represent a percentage of the browser's larger viewport dimension (either width or height, whichever is greater). 1vmax equals 1% of the larger viewport dimension, making them ideal for creating consistent sizing across different device orientations.

Benefits of VMAX Units
  • Orientation Resilience: Elements maintain consistent proportional sizing regardless of device orientation
  • Responsive Typography: Text that scales appropriately across all devices
  • Proportional Spacing: Consistent margins and padding across different screen configurations
  • Maximum Containment: Elements that respect the largest available dimension of the viewport

VMAX is part of the viewport units family alongside vw (viewport width), vh (viewport height), and vmin (viewport minimum).

CSS Usage Examples

Common ways to use VMAX units in your CSS:

/* Responsive typography */
h1 {
  font-size: 4vmax;
  margin-bottom: 1vmax;
}

h2 {
  font-size: 3vmax;
}

p {
  font-size: 1.5vmax;
  line-height: 1.5;
}

/* UI components */
.button {
  padding: 1vmax 2vmax;
  border-radius: 0.5vmax;
}

/* Containers */
.card {
  width: 40vmax;
  max-width: 90%;
  padding: 2vmax;
}

/* Icons and media */
.icon {
  width: 3vmax;
  height: 3vmax;
}

/* Spacing and layout */
.section {
  margin: 3vmax 0;
  padding: 2vmax;
}

/* Balanced square elements */
.square-element {
  width: 10vmax;
  height: 10vmax;
}

Combine VMAX with CSS clamp() for better control: font-size: clamp(16px, 2vmax, 32px); ensures text is never too small or too large.

Related Converters

PX to VMIN Converter PX to VW Converter PX to VH Converter All CSS Unit Converters