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Enter width and height in pixels to calculate aspect ratio and megapixels. Set a new width to find the proportional height, then open a matching image preset. This calculates dimensions, not compressed file size.
Choose the canvas for the intended placement, such as a square post or a wide company cover. The exported dimensions describe the file. The platform's feed, grid and avatar previews may show different crops, so inspect the destination before publishing.
A smaller pixel canvas can reduce image data, but the encoded byte size also depends on format, quality and image content. This calculator cannot predict KB or MB. Use the image compressor when you need to meet a file-size limit.
Aspect ratio describes the proportional relationship between width and height (e.g., 1:1 for square, 16:9 for widescreen). Two images with different pixel dimensions can share the same aspect ratio. Enter 1920 and 1080 above to see 16:9, then choose a new width to calculate the matching height.
Increasing the calculated dimensions adds pixels without restoring missing detail. Review the result at its intended display size before enlarging a small source. The platform presets are working canvases; they do not establish minimum upload requirements.
A 1080 × 1080 square is one useful working canvas, but there is no single size for every placement. Select the intended platform and asset, then check its upload preview.
Divide both width and height by their greatest common divisor. For example, 1920x1080 simplifies to 16:9 (1920/120 = 16, 1080/120 = 9). Use this calculator to find which standard aspect ratio matches your image dimensions.
On a screen, pixel dimensions matter more than the DPI value stored in a file. For printing, divide the pixel dimensions by the printer's requested pixels per inch. A 3000 × 2400 image at 300 PPI produces a 10 × 8 inch print. Ask your printer which PPI to use.
Changing a 3:2 photo to 1:1 requires a crop or added background, rather than a proportional resize. See how to make an image square without cropping. If the source is too small, review the image upscaler before enlarging it. For a physical print, calculate print pixels and enlargementfrom your source dimensions and the printer's requested PPI.