image dimensions, aspect ratio, megapixel, resize and storage calculators
Calculate image dimensions without uploading a file
Work out aspect ratio, megapixels, resized dimensions and rough storage totals from your own numbers.
Tools
Tools
Megapixel Calculator
Convert pixel dimensions into megapixels.
Open →ToolsAspect Ratio Decimal
Calculate width-to-height ratio.
Open →ToolsProportional Resize Width
Calculate new width from original dimensions and target height.
Open →ToolsTotal Pixel Count
Calculate total pixels from width and height.
Open →ToolsImage Library Size
Estimate total storage from image count and average file size.
Open →Guides
Guides
Pixels describe dimensions, not physical print size by themselves
Pixel width and height define the digital raster dimensions.
GuidesKeep aspect ratio when resizing
Proportional resizing changes width and height by the same scale factor.
GuidesEstimate image-library storage from averages
Average file size can provide a useful capacity estimate.
GuidesResolution is only one image-quality factor
More pixels do not automatically mean a better image.