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Free print tool

Print Size & DPI Calculator

Before you design or send a file to print, check the resolution. Enter a print size in inches, cm, mm or feet to see the pixels you need at any DPI – or enter an image’s pixels to see how large it can print sharply. Presets cover photo prints, A-sizes, visiting cards, posters, standees, flex banners and hoardings, with DPI guidance for each.

Free · No sign-up · Runs in your browser

Features

  • Print size → pixels and pixels → print size
  • Inches, cm, mm and feet
  • DPI presets with guidance (300, 150, 100, 72)
  • Presets for photos, A4/A3, visiting cards, flex banners and hoardings
  • Reads pixel size straight from an image
  • Megapixels and file size estimate

How to use the Print Size & DPI Calculator

  1. Choose the direction: print size → pixels or pixels → print size.
  2. Pick a preset or type the size.
  3. Select the DPI for the print type.
  4. Read the result.

Frequently asked questions

What DPI do I need for printing?

300 DPI for photos, visiting cards and brochures; 150–200 DPI for posters; 100 DPI for standees; 72 DPI or less for flex banners and hoardings viewed from a distance.

How many pixels for an A4 print at 300 DPI?

2480 × 3508 pixels.

What resolution for a 3 × 6 ft flex banner?

At 72 DPI you need 2592 × 5184 pixels. Flex is viewed from a distance, so 72 DPI prints clearly.

Does changing DPI in Photoshop improve quality?

No. Quality depends on the pixel count. Changing DPI without resampling only changes the print size.

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