Estimate the uncompressed size of an image from its width, height and bit depth.
Uncompressed size: 17.17 MB
Uncompressed size = width × height × bits per pixel ÷ 8 bytes. A 3000 × 2000 RGB image at 24 bits is about 17 MB. CMYK adds a fourth channel (32 bits), 16-bit editing doubles the size, and layers in a PSD add more. Compression (ZIP/LZW TIFF, PNG) usually shrinks files substantially.
An 18 × 24 inch poster at 300 DPI is 5400 × 7200 pixels, about 111 MB uncompressed in 24-bit RGB.
Free DPI calculator: convert pixels to inches and cm at any DPI, or find the pixel dimensions you need for a print size. Includes a 300 DPI size chart.
Convert images between JPG, PNG and WebP, compress them and resize them in your browser. Free, private and no upload.
Preflight customer artwork before printing: check resolution, effective DPI at print size, transparency and dimensions in your browser.
Paper size chart for A0–A6, US Letter, Legal and Tabloid in millimeters, inches and pixels at 300 DPI. Look up any size at your own DPI.
Convert length (m, cm, inches, feet, km) and weight (kg, g, lb, oz) for print sizes, banners and shipping.
Calculate the scale percentage to resize artwork from original to target dimensions, for enlarging or reducing prints and designs.
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