Aspect ratio calculator
Find the width or height for any aspect ratio, or the ratio of a frame you already have, and see which platform sizes it fits.
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- Platform sizes checked October 8, 2026
Video sizes for every platform
Each platform's own help or ads page, read on October 8, 2026. Several publish no recommended size for regular uploads, only a range of ratios or a maximum, so those rows give the limit, or the size Meta's ads guide recommends, instead of a guess.
| Platform | Aspect ratio | Size | Source |
|---|---|---|---|
| YouTube · Video | 16:9 | 1920 × 1080 for 1080p (3840 × 2160 for 4K) | YouTube Help: video resolution and aspect ratios |
| YouTube · Shorts | Square or vertical | Up to 1080p, so 1080 × 1920 at most; up to 3 minutes | YouTube Help: YouTube Shorts · YouTube Help: upload YouTube Shorts |
| Instagram · Reels | 9:16 (accepts 1.91:1 to 9:16) | At least 720 px; ads: 1440 × 2560 | Instagram Help: reels · Meta Ads Guide: Facebook Reels video |
| Instagram · Feed photo | 1.91:1 to 3:4 | Up to 1080 px wide, so 1080 × 1440 at 3:4 | Instagram Help: photo resolution |
| Instagram · Feed video ad | 9:16 (feed also takes 1:1, 4:5) | 1080 × 1920 | Meta Ads Guide: Instagram Feed video |
| Instagram · Stories ad | 9:16 | 1440 × 2560 | Meta Ads Guide: Instagram Stories video |
| Facebook · Reels | Any ratio (ads: 9:16) | Ads: 1440 × 2560 | Facebook Help: reels · Meta Ads Guide: Facebook Reels video |
| Facebook · Feed video ad | 4:5 (feed also takes 1:1) | 1440 × 1800 | Meta Ads Guide: Facebook Feed video |
| TikTok · In-feed ad | 9:16 (also 16:9, 1:1) | At least 540 × 960 | TikTok Ads Help: In-Feed Ads |
| LinkedIn · Video post | 1:2.4 to 2.4:1 | 256 × 144 to 4096 × 2304; no size recommended | LinkedIn Help: video sharing |
| LinkedIn · Video ad | 4:5 (also 16:9, 9:16, 1:1) | 720 × 900 (16:9: 1920 × 1080) | LinkedIn Help: video ads specs |
| X · Video post | 1:2.39 to 2.39:1 | Up to 1920 × 1200 or 1200 × 1900; no size recommended | X Help: videos |
| X · Video ad | 1:1 or 16:9 (also 4:5, 2:3, 1.91:1, 9:16) | 1200 × 1200 or 1920 × 1080 | X Help: creative ad specifications |
| Pinterest · Video Pin | 1:1, 2:3, 4:5 or 9:16 | No size published; 4 seconds to 15 minutes | Pinterest Help: product specs |
| Snapchat · Snap Ad | 9:16 | 1080 × 1920 | Snapchat Business Help: Snap Ads specs |
Common aspect ratios
| Ratio | Use | At 1080 px |
|---|---|---|
| 16:9 | Widescreen: YouTube, TV, laptops | 1,920 × 1,080 |
| 9:16 | Vertical: Shorts, Reels, TikTok, Stories | 1,080 × 1,920 |
| 4:5 | Portrait feed post | 1,080 × 1,350 |
| 1:1 | Square | 1,080 × 1,080 |
| 3:4 | Portrait | 1,080 × 1,440 |
| 4:3 | Classic TV | 1,440 × 1,080 |
| 21:9 | Ultrawide, cinematic | 2,520 × 1,080 |
| 1.91:1 | Landscape link or feed post | 2,062 × 1,080 |
How to calculate aspect ratio
Height = width × (ratio height ÷ ratio width). For 16:9 at 1,920 pixels wide, 1,920 × 9 ÷ 16 = 1,080. For 9:16 at 1,080 wide, 1,080 × 16 ÷ 9 = 1,920. To find the ratio of a frame you already have, divide both sides by their greatest common divisor: 1,080 × 1,350 divides by 270 to give 4:5.
Video encoders work in pairs of pixels, so keep both sides even: H.264 with standard 4:2:0 color won't accept an odd width or height. When you crop a 16:9 video to 9:16, plan the shot with the subject in the center third, because the vertical frame keeps only about a third of the width.
Exporting for several platforms? The video file size calculator shows how big each export will be, and our thumbnail checker covers YouTube's thumbnail specs.
Sources: YouTube Help: video resolution and aspect ratios · YouTube Help: YouTube Shorts · YouTube Help: upload YouTube Shorts · Instagram Help: reels · Instagram Help: photo resolution · Meta Ads Guide: Instagram Feed video · Meta Ads Guide: Instagram Stories video · Facebook Help: reels · Meta Ads Guide: Facebook Reels video · Meta Ads Guide: Facebook Feed video · TikTok Ads Help: In-Feed Ads · LinkedIn Help: video sharing · LinkedIn Help: video ads specs · X Help: videos · X Help: creative ad specifications · Pinterest Help: product specs · Snapchat Business Help: Snap Ads specs.
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