Free image and video size calculator
Calculate missing width or height, simplify a ratio, and compare common image and video sizes before you upload, crop, or export.
Live preview follows the selected ratio.
Calculator
Choose a ratio, enter width or height, and the calculator fills the matching dimension while keeping the image or video proportional.
Use these sizes as starting points. Exact platform requirements can change, so treat the calculator as the proportional reference and check the final upload screen before publishing.
| Use case | Pixel size | Ratio |
|---|---|---|
| YouTube video | 1920 x 1080 | 16:9 |
| TikTok / Reels / Shorts | 1080 x 1920 | 9:16 |
| Instagram square | 1080 x 1080 | 1:1 |
| Instagram portrait | 1080 x 1350 | 4:5 |
The table below updates when you choose a new ratio. It is useful for planning responsive images, thumbnails, and video exports.
| Width | Matching height | Size |
|---|
Keep the ratio locked when you need a clean resize without distortion.
Use even pixel numbers when exporting video, because some encoders dislike odd dimensions.
For social media, pick the platform preset first, then resize your creative around that frame.
This reference chart shows how common frames compare. Use it when deciding whether a creative should be wide, square, portrait, or ultrawide.
