16:9 Aspect Ratio Calculator
16:9 is the standard widescreen ratio. YouTube videos, HD and 4K TVs, modern monitors, and most projectors all use it. Use this calculator to size any image to 16:9 in pixels and export the resized version.
Where 16:9 is used
16:9 is the default widescreen ratio for the modern internet. YouTube videos, Vimeo, Netflix, every TV manufactured since 2010, every laptop and external monitor outside of the ultrawide niche, and most projectors. If you record video on a phone in landscape mode, that footage is 16:9. If you record on a DSLR or mirrorless camera in video mode, also 16:9.
When you size content for the web, 16:9 is the safe default. It fits player chrome cleanly, scales down to thumbnails without awkward crops, and looks correct on roughly any device a viewer might use.
Common 16:9 dimensions
1280×720 (HD, 720p), 1920×1080 (Full HD, 1080p), 2560×1440 (QHD, 1440p), and 3840×2160 (4K UHD, 2160p) are all 16:9. They're the same shape, different resolutions. Use 1280×720 for thumbnails, 1920×1080 for standard video, 3840×2160 when you want the room to crop or zoom in post.
16:9 vs adjacent ratios
16:10 is slightly taller and used by some MacBook displays and older Apple monitors. 21:9 is wider, used by ultrawide monitors and cinematic film. 4:3 is the older TV ratio that 16:9 replaced. If a tool offers you 16:9 and 16:10, pick 16:9 unless you specifically need the extra vertical room.
How the calculator works
Math, resizing, and image cropping in one place. Free, no signup, no watermark.
Enter your dimensions
Type any width and height in pixels. We simplify the ratio with the greatest common divisor and tell you the closest standard match.
Resize without losing proportions
Switch to Resize. Keep the original ratio while scaling to a new width or height. Round to whole pixels with one click.
Or drop in an image
Image mode shows a smart-cropped preview for every social platform: Instagram, TikTok, YouTube, LinkedIn, Pinterest, and more.
Download the right size
Grab a single PNG at the exact dimensions you need, or download every social platform size at once as a ZIP.
Built for the work you actually do
Every social platform. Every common ratio. Image-aware so you see what gets cropped before you post.
Sizing for Instagram
Square, portrait, story, Reel. Instagram has four valid sizes and the wrong one gets your post cropped. Pick the platform, get the pixels.
YouTube videos and thumbnails
Videos at 1920×1080 or 3840×2160. Thumbnails at 1280×720. Shorts at 1080×1920. Get the right size without searching the YouTube docs.
TikTok and Reels covers
9:16 vertical at 1080×1920. Drop your cover art, download a perfectly cropped version that won't get squashed.
DSLR and stock photos
Original 3:2 photo, target 4:5 Instagram portrait? Resize without distortion. Center crop preview shows what gets cut.
Designing for screens
Build mockups that fit 16:9 monitors, 9:16 phones, or 21:9 ultrawides. Get pixel dimensions before you open Figma.
Bulk export for a campaign
One image, every social platform size. Drop it in image mode, hit download all. ZIP file with PNGs ready to post.
Social media aspect ratios in 2026
Every common social platform format with the recommended pixel size and ratio.
| Platform | Format | Pixels | Ratio |
|---|---|---|---|
| Square post | 1080 × 1080 | 1:1 | |
| Portrait post | 1080 × 1350 | 4:5 | |
| Landscape post | 1080 × 566 | 191:100 | |
| Story | 1080 × 1920 | 9:16 | |
| Reel | 1080 × 1920 | 9:16 | |
| TikTok | Video | 1080 × 1920 | 9:16 |
| YouTube | Video | 1920 × 1080 | 16:9 |
| YouTube | Shorts | 1080 × 1920 | 9:16 |
| YouTube | Thumbnail | 1280 × 720 | 16:9 |
| Feed post | 1200 × 630 | 191:100 | |
| Story | 1080 × 1920 | 9:16 | |
| Cover | 851 × 315 | 851:315 | |
| Square post | 1200 × 1200 | 1:1 | |
| Cover | 1584 × 396 | 4:1 | |
| X (Twitter) | Image post | 1600 × 900 | 16:9 |
| X (Twitter) | Header | 1500 × 500 | 3:1 |
| Standard pin | 1000 × 1500 | 2:3 | |
| Tall pin | 1000 × 2100 | 10:21 | |
| Snapchat | Snap / Story | 1080 × 1920 | 9:16 |
Last verified May 2026.
Other ratios
Pre-filled calculators for the most common ratios.
Frequently asked questions
Is 1280×720 really 16:9?
Yes. 1280÷720 simplifies to 16÷9. It's a lower resolution than 1920×1080 but the same shape.
What's the difference between 1080p and 4K if both are 16:9?
Both have the same aspect ratio. The difference is pixel count. 1080p is 1920×1080, 4K is 3840×2160, which is exactly four times as many pixels in the same shape. Detail is sharper at higher resolutions, especially on bigger screens.
Should I export YouTube videos at 1920×1080 or 3840×2160?
Export at the highest resolution your source footage supports. YouTube serves down from 4K to 1080p to 720p depending on the viewer's connection. Uploading 4K gives you a cleaner 1080p stream because of how YouTube re-encodes.
What is an aspect ratio?
Aspect ratio is the relationship between width and height, written as width:height. A 1920×1080 image has a 16:9 aspect ratio because 1920÷120 = 16 and 1080÷120 = 9. The ratio describes the shape of the rectangle, independent of size. A 1280×720 image is also 16:9.
How do I calculate the aspect ratio of an image?
Divide width by height to get the decimal ratio. To get the simplified form, find the greatest common divisor (GCD) of width and height and divide both by it. 1920÷1080 = 1.778, GCD(1920, 1080) = 120, so the ratio is 16:9. The calculator above does this instantly.
Is 1920×1080 a 16:9 aspect ratio?
Yes. 1920÷1080 = 1.778, which equals 16÷9. Full HD video, most monitors, and standard YouTube videos are all 16:9 at 1920×1080.
What aspect ratio is best for Instagram?
Instagram supports four ratios. Square 1:1 at 1080×1080 for feed posts. Portrait 4:5 at 1080×1350 for taller feed posts (recommended for organic reach). Landscape 1.91:1 at 1080×566 for wide posts. Vertical 9:16 at 1080×1920 for Stories and Reels.
What ratio should I use for TikTok?
TikTok uses 9:16 vertical at 1080×1920 pixels. The same applies to Instagram Reels and YouTube Shorts. One vertical export covers all three.
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