Why Avatar Image Resolution Matters
A profile avatar might display at only 48px on screen, but a retina display actually needs several times that many pixels to render it sharply. Preparing an image at exactly the display size makes avatars look blurry on high-density screens. This calculator takes your display size and retina scale factor to compute the actual minimum resolution you need.
How It's Calculated
The required resolution is simply the display size multiplied by the retina scale factor. For example, an avatar shown at 48px needs at least a 96x96px source image to look sharp on a 2x display.
Applying It in Practice
Most modern phones and laptops use 2x pixel density, so 2x is a safe default, and preparing up to 3x covers high-end displays too. Because avatars are small images to begin with, even a 3x version stays lightweight, especially when saved as a compressed format like WebP.
Frequently Asked Questions
2x covers most modern devices as a baseline, and preparing up to 3x is safe if you want to support high-end displays too.
For small images like avatars, even 3x doesn't add much file size. Using a compressed format like WebP keeps high resolution without a real size penalty.