Reduce any width and height to their simplest aspect ratio, and proportionally scale to a new width or height while keeping the ratio intact — ideal for images, video, and responsive design.
How it works
- Enter the original width and height of your media.
- To scale, enter your target new width OR target new height.
- The calculator automatically solves for the missing dimension to maintain perfect proportions.
Frequently asked questions
Why is the 16:9 aspect ratio so important?
16:9 is the universal widescreen standard for modern HD video, televisions, and monitors (including 1080p and 4K resolutions).
How do I ensure my image doesn't stretch when resizing?
By strictly adhering to the calculated aspect ratio. The math guarantees the new dimensions respect the original proportions.
What ratio is optimal for social media content?
1:1 (square) and 4:5 work best for Instagram feeds, while 9:16 is mandatory for vertical formats like Stories, Reels, and TikTok.