Skip to content
Marvin's Toolbox.

Search tools

Type to filter all tools

Print Size Calculator

Convert between pixels and print size at any DPI. Enter an image's pixel dimensions to see how large it prints in cm or inches, or start from a print size and DPI to get the pixels you need. Knows the DIN A series from A0 to A10 and tells you whether your image is sharp enough for each.

Everything runs locally in your browser. Your data never leaves your device.

Solve for

Pick the value to calculate. The other two become the inputs.

Unit

3,000 × 2,000 px at 300 DPI prints at

25.4 × 16.93 cm10 × 6.67 in
Megapixels6.00Aspect3:2

Read the size from an image

Optional. Drop a photo to fill in its pixel dimensions. Only the dimensions are read.

Image

Drag and drop, paste, or click to browse

Any image format your browser can open

Your image on standard paper

How sharply 3,000 × 2,000 px fills each size edge to edge, and how much would be cropped where the shapes differ.

PaperSizeEffective DPIVerdictCrop needed
A084.1 × 118.9 cm60Poor5.7%
A159.4 × 84.1 cm86Poor5.6%
A242 × 59.4 cm121Poor5.7%
A329.7 × 42 cm171Fair5.7%
A421 × 29.7 cm242Good5.7%
A514.8 × 21 cm343Excellent5.4%
A610.5 × 14.8 cm484Excellent6%
A77.4 × 10.5 cm686Excellent5.4%
A85.2 × 7.4 cm977Excellent5.1%
A93.7 × 5.2 cm1,373Excellent6.3%
A102.6 × 3.7 cm1,954Excellent5.1%
Letter21.59 × 27.94 cm235Good13.7%
Legal21.59 × 35.56 cm214Good8.9%

Pixels needed for each paper size

Edge-to-edge pixel dimensions for the common print resolutions. 300 DPI is the usual photo-print target.

PaperSize150 DPI300 DPI600 DPI
A084.1 × 118.9 cm4,967 × 7,022 px9,933 × 14,043 px19,866 × 28,087 px
A159.4 × 84.1 cm3,508 × 4,967 px7,016 × 9,933 px14,031 × 19,866 px
A242 × 59.4 cm2,480 × 3,508 px4,961 × 7,016 px9,921 × 14,031 px
A329.7 × 42 cm1,754 × 2,480 px3,508 × 4,961 px7,016 × 9,921 px
A421 × 29.7 cm1,240 × 1,754 px2,480 × 3,508 px4,961 × 7,016 px
A514.8 × 21 cm874 × 1,240 px1,748 × 2,480 px3,496 × 4,961 px
A610.5 × 14.8 cm620 × 874 px1,240 × 1,748 px2,480 × 3,496 px
A77.4 × 10.5 cm437 × 620 px874 × 1,240 px1,748 × 2,480 px
A85.2 × 7.4 cm307 × 437 px614 × 874 px1,228 × 1,748 px
A93.7 × 5.2 cm219 × 307 px437 × 614 px874 × 1,228 px
A102.6 × 3.7 cm154 × 219 px307 × 437 px614 × 874 px
Letter21.59 × 27.94 cm1,275 × 1,650 px2,550 × 3,300 px5,100 × 6,600 px
Legal21.59 × 35.56 cm1,275 × 2,100 px2,550 × 4,200 px5,100 × 8,400 px

What you can do

  • Convert pixels to print size in cm, mm or inches at any DPI.
  • Work out the pixels you need for a given print size and resolution.
  • Check the effective DPI of an image printed at a specific size.
  • See whether a photo is sharp enough for A4, A3 or any other DIN A size.
  • Look up the pixel dimensions of every paper size at 150, 300 and 600 DPI.
  • Read a photo's pixel dimensions and megapixels by dropping the file in.
  • Spot aspect-ratio mismatches and see how much a paper size would crop.

How to use the Print Size Calculator

  1. 1Pick what to solve for: print size, pixels needed or effective DPI.
  2. 2Fill in the other two values. DPI presets and a paper-size picker save typing, or drop an image to read its pixels.
  3. 3Read the result, the megapixel and aspect-ratio summary, and the verdict for every standard paper size below.

What DPI do you need?

DPI (dots per inch, often called PPI for images) is how densely your pixels are spread over the paper. 300 DPI is the standard for photo prints viewed in hand, and the tool rates that excellent. Around 200 DPI still looks good at arm's length, and 150 DPI is fine for posters seen from across a room. Below 150 DPI individual pixels start to show up close. The verdicts in the paper table use exactly these thresholds, so a poster-sized print marked fair can still be the right call for its viewing distance.

Why the crop column matters

DIN A paper has a fixed shape, roughly 1:1.41, while most cameras shoot 3:2 or 4:3. When the shapes differ, printing edge to edge means cutting part of the image away. The crop column tells you how many of your pixels would be lost to fill each size, so you can decide between cropping, leaving white borders or picking a different format before you order the print. A 3:2 photo on A4 loses about 6% of its pixels, while a square image loses nearly 30%.

Preparing a file for printing

Once you know the pixels a print needs, prepare the file to match. If your image has more than enough resolution, you can compress it with the JPG Image Compressor before sending it to a print service, and the Image Converter turns formats a lab will not accept, like WebP or HEIC, into JPG or PNG. If the numbers say your image is too small, printing smaller or viewing from further away beats upscaling in most cases.

Related tools

Chmod Calculator

Convert Unix file permissions between checkboxes, octal like 755 and symbolic notation like rwxr-xr-x, all kept in sync as you edit any of them. Covers setuid, setgid and the sticky bit, and shows the matching chmod command ready to copy.

devcalculator

Color Blindness Simulator

See any image the way people with a color vision deficiency see it. Upload a picture and preview protanopia, deuteranopia, tritanopia, the milder anomalous forms and monochromacy next to the original, then download any simulation as a full resolution PNG.

mediaimagecolor

Color Palette Extractor

Pull the dominant colors out of any image as a ready-to-copy palette. Choose how many colors you want, copy each one as HEX, RGB or HSL, and export the whole palette at once.

mediaimagecolor

CSS Unit Converter

Convert between px, rem, em, percent, pt and viewport units with a configurable root font size. Type into any field and the others update as you go, set the parent font size for em math, and read a conversion table for common sizes.

devconvertercalculator

EXIF Editor

See and edit the EXIF metadata inside a photo, then download it with your changes or save a copy with all metadata removed, GPS included. It reads JPEG, PNG, HEIC and more, and edits JPEG files.

mediaimageexif

EXIF Transfer

Copy the EXIF metadata from one photo onto another without changing the destination's pixels. That covers camera model, lens, focal length, exposure, GPS and more. Choose to replace all metadata or only fill in what the source provides.

mediaimageexif