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Social Aspect Ratio Calc

Square 1:1 (Instagram feed), portrait 4:5 (Instagram, Facebook feed), vertical 9:16 (Stories, Reels, TikTok, YouTube Shorts), landscape 16:9 (YouTube, Twitter, LinkedIn video), pin 2:3 (Pinterest), and Twitter image 16:9 or 1.91:1. The calculator helps you size or crop a source a

Social Media Tools

Square 1:1 (Instagram feed), portrait 4:5 (Instagram, Facebook feed), vertical 9:16 (Stories, Reels, TikTok, YouTube Shorts), landscape 16:9 (YouTube, Twitter, LinkedIn video), pin 2:3 (Pinterest), and Twitter image 16:9 or 1.91:1. The calculator helps you size or crop a source a

This free Social Aspect Ratio Calc from KX Toolkit is part of our all-in-one online toolkit. It runs entirely in your browser, so your data never leaves your device for client-side operations. 100% free, forever - no paywall, no credit card, no trial.

How to use the Social Aspect Ratio Calc

  1. Pick the platform you're posting to.
  2. Paste or write your copy.
  3. Run the tool - it shows the count, suggestions or formatted text.
  4. Copy the result and paste it into the platform composer.

What you can do with the Social Aspect Ratio Calc

  • Hit Twitter's 280-character limit while keeping links intact.
  • Generate relevant hashtags for Instagram and TikTok.
  • Turn plain text into Unicode bold/italic for LinkedIn posts.
  • Find the right caption length for each platform.

Why use KX Toolkit's Social Aspect Ratio Calc

  • Browser-based: Works on Windows, macOS, Linux, iOS and Android - no install, no extension.
  • Privacy-first: Client-side tools never upload your data; server-side tools delete files right after processing.
  • Mobile-friendly: Full feature parity on phones and tablets - not a stripped-down view.
  • Fast: Optimised for instant feedback. No artificial waiting screens, no email-gated downloads.
  • One hub for everything: 300+ tools across SEO, text, image, PDF, code, color, calculators and more - skip switching between sites.

Tips for the best results

Schedule batches of posts using the character counter side-by-side with your scheduling tool - saves a lot of editing later.

Related Social Media Tools

If you find this tool useful, explore the full Social Media Tools collection or browse our complete tool directory. KX Toolkit is built for marketers, developers, designers, students and anyone who needs a quick utility without signing up for yet another SaaS.

What are the most common social aspect ratios?
Square 1:1 (Instagram feed), portrait 4:5 (Instagram, Facebook feed), vertical 9:16 (Stories, Reels, TikTok, YouTube Shorts), landscape 16:9 (YouTube, Twitter, LinkedIn video), pin 2:3 (Pinterest), and Twitter image 16:9 or 1.91:1. The calculator helps you size or crop a source asset to any of these without distortion.
How do I calculate dimensions from an aspect ratio?
For ratio W:H, fix one dimension (usually width) and compute the other: height = width × (H ÷ W). For 9:16 at 1080 wide, height = 1080 × (16 ÷ 9) = 1920. For 4:5 at 1080 wide, height = 1080 × (5 ÷ 4) = 1350. The calculator does this for you and rounds to even pixels for clean encoding.
What is the safe zone in vertical social videos?
For 9:16 content (Stories, Reels, Shorts, TikTok), keep critical visual elements inside a centered 1080x1420 safe zone (roughly 250 pixels of padding top and bottom). Platform UI overlays (caption text, sticker tray, profile bug, action buttons) cover the top and bottom strips. Designing inside the safe zone prevents your call to action from getting hidden.
Can I upload non-standard aspect ratios?
Most platforms accept a range and auto-letterbox or auto-crop content outside it. Instagram feed accepts 1.91:1 to 4:5; videos outside that range get cropped. TikTok and Shorts strongly prefer 9:16. Uploading a 1:1 to a vertical platform leaves visible black bars and looks unprofessional. Use the calculator to confirm fit before uploading.
Why do my videos get compressed when uploaded?
Every social platform re-encodes uploaded video to its target codec and bitrate, which softens detail. Mitigate by uploading at the platform's recommended resolution (not larger), using H.264 high-profile, 8 to 12 Mbps bitrate, and AAC stereo audio. The aspect ratio calculator pairs naturally with bitrate guidelines to deliver clean uploads.
Should I shoot in 4K and downscale?
Yes when possible. Shooting in 4K (3840x2160 or 4096x2160) and downscaling to 1080 produces sharper, less noisy output than recording natively at 1080. Use the calculator to confirm the destination crop and aspect, then export at the target dimension to avoid uploading unnecessarily large files that the platform will re-compress anyway.

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