# Aspect Ratio Calculator > A free online tool to calculate aspect ratios for images and videos. ## Pages - [Aspect Ratio Calculator](https://aspectratiocalculator.com/): General aspect ratio calculator. Enter width and height to get the aspect ratio, dimensions, and mode (Portrait/Landscape/Square). - [16:9 Aspect Ratio Calculator](https://aspectratiocalculator.com/16-9/): Calculate the correct height for any width to maintain the HD 16:9 aspect ratio. Includes a list of top 16:9 resolutions. - [4:3 Aspect Ratio Calculator](https://aspectratiocalculator.com/4-3/): Calculate the correct height for any width to maintain the standard 4:3 aspect ratio. Includes a list of popular 4:3 resolutions. - [21:9 Aspect Ratio Calculator](https://aspectratiocalculator.com/21-9/): Calculate the correct height for any width to maintain the 21:9 ultrawide aspect ratio. Used for ultrawide monitors and cinematic content. - [1:1 Aspect Ratio Calculator](https://aspectratiocalculator.com/1-1/): Calculate square dimensions for the 1:1 aspect ratio. Used for Instagram posts, profile pictures, album art, and app icons. - [3:2 Aspect Ratio Calculator](https://aspectratiocalculator.com/3-2/): Calculate dimensions for the 3:2 aspect ratio. The standard for DSLR cameras, 35mm film, and photo prints like 4x6 inches. - [9:16 Aspect Ratio Calculator](https://aspectratiocalculator.com/9-16/): Calculate dimensions for the 9:16 vertical aspect ratio. The standard for TikTok, Instagram Reels, YouTube Shorts, and Snapchat stories. - [5:4 Aspect Ratio Calculator](https://aspectratiocalculator.com/5-4/): Calculate dimensions for the 5:4 aspect ratio. Used for 8x10 photography prints, large format cameras, and classic 1280x1024 office monitors. - [2:1 Aspect Ratio Calculator](https://aspectratiocalculator.com/2-1/): Calculate dimensions for the 2:1 aspect ratio. Used for Univisium cinema, 18:9 smartphone displays, panoramic photography, VR content, and website hero images. - [32:9 Aspect Ratio Calculator](https://aspectratiocalculator.com/32-9/): Calculate dimensions for the 32:9 super ultrawide aspect ratio. Used for super ultrawide monitors like Samsung Odyssey G9, dual-monitor replacements, sim racing, and financial trading displays. ## Tools - [Compare Aspect Ratios](https://aspectratiocalculator.com/compare/): Visual aspect ratio comparison tool. Select multiple ratios (16:9, 4:3, 1:1, 9:16, 21:9, etc.) and see them overlaid or side by side. Includes custom ratio input, comparison data table, and articles on choosing the right ratio. - [Social Media Image Sizes](https://aspectratiocalculator.com/social-media-sizes/): Complete reference of image dimensions for all major social media platforms. Covers profile pictures, cover photos, post images, stories, and ad formats for Instagram, Facebook, Twitter/X, LinkedIn, YouTube, TikTok, Pinterest, and Snapchat. - [Pixel Density Calculator](https://aspectratiocalculator.com/pixel-density/): Calculate pixel density (PPI/DPI) and convert between pixels, DPI, and physical dimensions. Three modes: Pixels to Print Size, Print Size to Pixels, and Screen PPI calculator with device presets. ## Guides - [Best Aspect Ratios for YouTube Videos](https://aspectratiocalculator.com/youtube-aspect-ratios/): Complete guide to YouTube aspect ratios covering standard 16:9 videos, 9:16 Shorts, thumbnails, channel banners, and export settings. - [Instagram Aspect Ratios](https://aspectratiocalculator.com/instagram-aspect-ratios/): Complete guide to Instagram aspect ratios for Feed posts (1:1, 4:5, 1.91:1), Stories and Reels (9:16), carousels, profile pictures, and Reel covers. - [TikTok Aspect Ratios](https://aspectratiocalculator.com/tiktok-aspect-ratios/): Complete guide to TikTok aspect ratios and video dimensions covering standard 9:16 videos, photo mode, profile pictures, ad formats, safe zones, and cross-platform repurposing. - [Facebook Aspect Ratios](https://aspectratiocalculator.com/facebook-aspect-ratios/): Complete guide to Facebook aspect ratios and dimensions covering Feed posts (4:5, 1:1, 1.91:1), Stories and Reels (9:16), cover photos, profile pictures, ads, and Marketplace listings. - [Twitter (X) Aspect Ratios](https://aspectratiocalculator.com/twitter-aspect-ratios/): Complete guide to Twitter/X aspect ratios and dimensions covering in-feed images (16:9), multi-image layouts, video posts, header photos (3:1), profile pictures, Twitter Cards (2:1), GIFs, and ad formats. - [LinkedIn Aspect Ratios](https://aspectratiocalculator.com/linkedin-aspect-ratios/): Complete guide to LinkedIn aspect ratios and dimensions covering feed posts (1:1, 4:5, 1.91:1), profile photos, banners (4:1), company covers, video, carousel/document posts, articles, events, and ad formats. - [Pinterest Aspect Ratios](https://aspectratiocalculator.com/pinterest-aspect-ratios/): Complete guide to Pinterest aspect ratios and dimensions covering standard pins (2:3), Idea Pins (9:16), video pins, profile pictures, board covers, and ad formats including promoted pins, carousel ads, shopping ads, and collection ads. - [Snapchat Aspect Ratios](https://aspectratiocalculator.com/snapchat-aspect-ratios/): Complete guide to Snapchat aspect ratios and dimensions covering Snaps, Stories, Spotlight (all 9:16 at 1080x1920), profile images, ads, lenses, and geofilters. - [Twitch Aspect Ratios](https://aspectratiocalculator.com/twitch-aspect-ratios/): Complete guide to Twitch aspect ratios and dimensions covering stream resolution (16:9, 1080p/720p/1440p), profile pictures, banners (1200x480), panels (320px wide), emotes (28/56/112px), sub badges (18/36/72px), overlays, VOD thumbnails, and cross-platform comparison with YouTube. - [Discord Image Sizes](https://aspectratiocalculator.com/discord-aspect-ratios/): Complete guide to Discord image dimensions covering server icons (512x512), server banners (960x540), invite splash (1920x1080), profile avatars, profile banners (600x240), custom emojis (128x128), stickers (320x320), role icons (64x64), embedded images, app directory assets, and boost level image perks. - [What Is Aspect Ratio?](https://aspectratiocalculator.com/what-is-aspect-ratio/): Beginner-friendly explainer covering what aspect ratio means, how to calculate it, common ratios (16:9, 4:3, 1:1, 9:16), the difference between aspect ratio and resolution, and a brief history of screen shapes. - [Video Conferencing Aspect Ratios](https://aspectratiocalculator.com/video-conferencing-aspect-ratios/): Complete guide to aspect ratios for Zoom, Microsoft Teams, Google Meet, and Cisco Webex. Covers camera resolutions, virtual background dimensions (1920x1080), screen sharing ratios, presentation slides, meeting recordings, and webcam setup tips. - [Film & Cinema Aspect Ratios](https://aspectratiocalculator.com/film-aspect-ratios/): Complete guide to every cinema aspect ratio from Academy 1.375:1 to CinemaScope 2.39:1, IMAX 1.43:1, and Univisium 2:1. Covers history, widescreen revolution, modern standards (1.85:1 vs 2.39:1), letterboxing on TV, anamorphic vs spherical lenses, and choosing ratios for film projects. - [Photography & Print Aspect Ratios](https://aspectratiocalculator.com/photography-aspect-ratios/): Complete guide to photography aspect ratios covering DSLR 3:2, mirrorless 4:3, medium format, standard print sizes (4x6, 5x7, 8x10, 16x20), DPI/resolution for prints, social media crops for photographers, panoramic formats, and editing workflow tips. - [Gaming & Ultrawide Monitor Aspect Ratios](https://aspectratiocalculator.com/gaming-aspect-ratios/): Complete guide to gaming aspect ratios: 16:9 vs 21:9 vs 32:9 ultrawide monitors. Resolution tables, FOV comparison, GPU requirements, game compatibility, curved displays, and how to choose the right gaming monitor. - [Presentation Aspect Ratios](https://aspectratiocalculator.com/presentation-aspect-ratios/): Complete guide to presentation slide dimensions and aspect ratios for PowerPoint, Google Slides, and Keynote. 16:9 vs 4:3, pixel dimensions, how to change slide size, image sizing, export tips, and display compatibility. - [AI Image Generator Aspect Ratios](https://aspectratiocalculator.com/ai-image-aspect-ratios/): Complete guide to aspect ratios for AI image generators including Midjourney, DALL-E 3, Stable Diffusion, Flux, Ideogram, and Google Imagen. Default sizes, supported ratios, recommended dimensions, upscaling tips, and common mistakes. - [E-commerce Product Image Sizes](https://aspectratiocalculator.com/ecommerce-product-image-sizes/): Complete guide to product image dimensions and aspect ratios for Amazon, Shopify, eBay, Etsy, Walmart, WooCommerce, and social commerce platforms. Required sizes, file specs, multi-platform workflow, optimization tips, and per-product-type ratio recommendations. - [Wallpaper & Desktop Background Sizes](https://aspectratiocalculator.com/wallpaper-sizes/): Complete guide to wallpaper resolutions and aspect ratios for every screen type - 1080p, 1440p, 4K, and 5K monitors (16:9), ultrawide 21:9, super ultrawide 32:9, MacBook 16:10, phone wallpapers (9:16), iPad wallpapers (4:3), and dual monitor spanning wallpapers.