Aspect Ratio Calculator Online
Calculate aspect ratios for images and videos. Find height/width for 16:9, 4:3, 1:1. Perfect for social media templates.
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About Aspect Ratio Calculator
Calculate width, height, or aspect ratio from any two given values. Supports common presets: 16:9 (YouTube/TV), 9:16 (Instagram Reels/Stories), 4:3 (standard), 1:1 (Instagram square), 4:5 (Instagram portrait). Shows all resolutions for the chosen ratio.
Aspect ratio is one of the most important concepts in digital media production. Wrong aspect ratios cause black bars in YouTube videos, cropped images on Instagram, and distorted graphics in presentations. This tool is used by social media managers, video editors, graphic designers, and web developers to instantly calculate the correct dimensions.
How to use
- Enter your values in the input fields — results update instantly as you type.
- No submit button needed. The tool calculates in real time.
- Copy your result or share it via WhatsApp or Twitter using the buttons above.
- Use the workflow links below to chain into related tools for a complete task.
- All processing is browser-only. Nothing you enter is sent to any server.
Tool details
⚡ Next step — complete your workflow
Frequently asked questions
Instagram post dimensions 2026?
Square: 1080×1080 (1:1). Portrait: 1080×1350 (4:5). Landscape: 1080×566 (1.91:1). Reels/Stories: 1080×1920 (9:16).
What resolution is Full HD?
1920×1080 pixels (16:9 aspect ratio, 2.07 megapixels). 4K = 3840×2160 (also 16:9, 8.29 megapixels).
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