Aspect Ratio Calculator for Images, Video & Screens Free Online Tool

Aspect ratio is the proportional relationship between the width and height of an image, video, or screen. It's written as two numbers separated by a colon, like 16:9 or 4:3. Our aspect ratio calculator makes it easy to find and convert between any ratio.

Instagram supports multiple aspect ratios: 1:1 (square) for feed posts, 4:5 (portrait) for vertical feed posts, 9:16 for Reels and Stories, and 1.91:1 for landscape posts. Use our Instagram aspect ratio calculator to find the perfect dimensions.

TikTok's standard aspect ratio is 9:16 (vertical), with a resolution of 1080x1920 pixels. This fills the entire mobile screen for an immersive viewing experience. Our TikTok aspect ratio calculator helps you prepare content that fits perfectly.

YouTube Shorts uses a 9:16 vertical aspect ratio, just like TikTok and Instagram Reels. The recommended resolution is 1080x1920 pixels. Use our YouTube Shorts aspect ratio calculator to format your Shorts correctly.

Instagram Reels use a 9:16 aspect ratio (1080x1920 pixels), filling the entire mobile screen vertically. Our Instagram reel aspect ratio calculator helps you crop and resize your Reels for maximum engagement.

Instagram feed posts support 1:1 (square, 1080x1080), 4:5 (portrait, 1080x1350), and 1.91:1 (landscape, 1080x566). The 4:5 portrait ratio takes up more screen space and tends to get higher engagement. Our Instagram post aspect ratio calculator simplifies the process.

16:9 is the standard widescreen aspect ratio for HDTV, YouTube videos, most computer monitors, and modern displays. Common resolutions include 1920x1080 (Full HD), 2560x1440 (QHD), and 3840x2160 (4K). Use our 16:9 aspect ratio calculator to find matching dimensions.

4:3 is the classic standard aspect ratio used by older CRT televisions, iPads, and some photography formats. Common resolutions include 800x600, 1024x768, and 1600x1200. Our 4:3 aspect ratio calculator helps you work with this traditional format.

To calculate aspect ratio in inches, measure the width and height of your screen or image in inches, then divide width by height. Our aspect ratio calculator inches mode does this automatically and simplifies the result to the nearest standard ratio.

To calculate aspect ratio from pixels, divide the pixel width by the pixel height. For example, 1920/1080 = 1.78, which simplifies to 16:9. Our aspect ratio calculator pixels mode handles this instantly for any resolution.

A screen aspect ratio calculator helps you find the proportional relationship between a display's width and height. Whether you're working with monitors, phones, TVs, or projectors, our screen aspect ratio calculator supports all common display formats.

A photo aspect ratio calculator helps photographers determine the correct dimensions for prints, web display, and social media. Our photo aspect ratio calculator supports standard print ratios like 3:2, 4:3, and 5:4 alongside digital formats.

A video aspect ratio calculator helps filmmakers and content creators determine the correct dimensions for their video projects. Our video aspect ratio calculator supports cinematic ratios like 16:9, 21:9, 2.39:1, and vertical 9:16 for social media.

A 16x9 aspect ratio calculator takes one dimension (width or height) and calculates the matching dimension to maintain the 16:9 proportion. For example, enter 1920 as width and get 1080 as height. Our 16x9 aspect ratio calculator does this instantly.

Yes, Allaspectratio is and will always be a free resource for creators, designers, and enthusiasts. All our calculators — including the aspect ratio calculator, ratio calculator, and all platform-specific tools — are completely free with no sign-up required.