Aspect Ratio Calculator — Pixels for Reels & Shorts
Enter any width and height to get the simplified aspect ratio, then read off the exact pixel sizes for every platform format — Reels and Shorts (9:16), square (1:1), portrait (4:5) and landscape (16:9).
Aspect Ratio Calculator
Enter any width and height to get the simplified ratio, plus exact pixel sizes for every platform format.
- Your ratio
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- Reels / Shorts 9:16
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- Square 1:1
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- Portrait 4:5
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- Landscape 16:9
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How to use it
- Type your source dimensions (the Inspector shows them for a file).
- Read the matching row for the format you are exporting.
- Use those pixels as your editor's sequence size.
Frequently asked questions
What size are Facebook & Instagram Reels?
1080 × 1920 (9:16). Keep text inside the centre — the top and bottom are covered by captions and buttons.
What is an aspect ratio?
The width-to-height relationship of an image or video, written like 16:9. It tells you the shape, not the size.
What size is a square post?
1080 × 1080 pixels (1:1) is the standard square size for Facebook and Instagram feeds.
Can I convert landscape to vertical?
Yes, by cropping or by adding blurred padding. This calculator gives you the target pixels; your editor does the crop.
Related tools
More free tools from ToolsOwl — all browser-only, all safe.
This tool never downloads other people's Facebook, TikTok or Instagram videos. It works only on files and text you provide. See our official download-your-own-video guide.