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Technology

Print Size Calculator

Maximum print size from image pixels.

Enter your values

Enter the image width in px.

Enter the image height in px.

Choose one of: 150 DPI poster, 240 DPI good, 300 DPI photo.

Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.

Results
Print size
20 × 13.3 in
In centimetres
50.8 × 33.9 cm
Megapixels
24
Max at 300 DPI
20 × 13.3 in

Quick answer

Print size is pixel dimensions divided by the printing DPI.

Inches = pixels ÷ DPI

At a glance

What it doesMaximum print size from image pixels.
CategoryTechnology
Inputs neededImage width, Image height, Print quality
Main outputPrint size
FormulaInches = pixels ÷ DPI
CostFree — no sign-up, no download

How to use the Print Size Calculator

  1. 1Enter the image pixel dimensions.
  2. 2Choose the DPI for your print type.
  3. 3Read the maximum size at that quality.

Inputs explained

Image width(px)
Enter the image width in px.
Image height(px)
Enter the image height in px.
Print quality
Choose one of: 150 DPI poster, 240 DPI good, 300 DPI photo.

Worked example

Using the values the calculator loads with:

Inputs

  • Image width6000 px
  • Image height4000 px
  • Print quality300 DPI photo

Results

  • Print size20 × 13.3 in
  • In centimetres50.8 × 33.9 cm
  • Megapixels24
  • Max at 300 DPI20 × 13.3 in

Frequently asked questions

Is 150 DPI acceptable?

Yes for large posters viewed from a distance.

Can I upscale?

AI upscaling helps but never adds real detail.

What do I need to enter into the Print Size Calculator?

Just 3 values: image width, image height, print quality. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.

How does the Print Size Calculator work out the answer?

Print size is pixel dimensions divided by the printing DPI. It applies the formula Inches = pixels ÷ DPI and shows the working so you can check each step by hand.

Is the Print Size Calculator free, and do I need an account?

It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.

Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.