Image Tools
Calculates exact dimensions based on standard ratios (16:9, 4:3, etc.).
Edit either width or height. The other value will update automatically to maintain the 16:9 ratio.
Under "Define Aspect Ratio", select a common preset from the dropdown menu (e.g. 16:9). If you need a specific ratio not listed, select "Custom" and manually enter the Ratio Width and Ratio Height.
Move down to the "Calculate Dimensions" section.
Type your known dimension into either the Target Width or Target Height box.
The tool will instantly calculate and update the other box with the exact pixel dimension needed to maintain your chosen aspect ratio. You can also view the visual preview on the right side of the screen.
Whether you are a video editor framing a 4K project, a UI designer sizing a hero banner, or a social media manager creating a new post, maintaining precise aspect ratios is essential. Guessing dimensions or relying on manual calculations often leads to stretched images, unwanted letterboxing (black bars), or distorted graphics. Our Aspect Ratio Calculator eliminates the math and guarantees pixel-perfect dimensions instantly.
This simple but powerful utility allows you to select from standard presets (like 16:9 for YouTube, 9:16 for TikTok, or 1:1 for Instagram) or input entirely custom aspect ratios. Once a ratio is defined, simply enter your target width or height. The calculator instantly computes the missing dimension required to maintain the exact proportions.
We also provide a dynamic visual preview box that scales in real-time. This allows you to visually verify the shape of your canvas before you ever open your editing software. Because the tool runs completely locally in your browser, it's lightning-fast and requires no internet connection after loading.
Drag-and-drop batch compression of JPG/PNG/WebP with a quality slider and before/after size preview.
Resize images to exact pixel dimensions instantly.
One-click image resizer and crop tool with presets for Instagram, YouTube, Twitter, and LinkedIn.
Convert HEIC/HEIF to JPG, PNG, WebP or AVIF instantly. Also supports bulk converting SVG, TIFF, BMP, and GIF.
