Poster Size & Ratio Calculator by yougotprints

Free poster size and aspect ratio calculator for checking image proportions and print compatibility before printing.

Upload a JPG, PNG, WEBP or GIF image to instantly check:

• Image dimensions in pixels
• Approximate aspect ratio
• Exact aspect ratio value
• Maximum print size at 300 DPI
• Poster size compatibility
• Exact fit, good fit or crop needed

Supported poster sizes include:

• A4 — 21 × 29.7 cm
• A3 — 29.7 × 42 cm
• A2 — 42 × 59.4 cm
• A1 — 59.4 × 84.1 cm
• 30 × 40 cm
• 40 × 50 cm
• 50 × 70 cm
• 60 × 90 cm
• 18 × 24 in
• 24 × 36 in

Images are processed locally in Firefox and are not uploaded or transmitted to a server. The add-on does not use analytics, a backend or an external API.

Try the free online version:

Poster Size & Aspect Ratio Calculator by You Got Prints