Print Size Calculator (Pixels to Inches)

Find how large you can print a photo or image at a given DPI, and the DPI for common print sizes.

Image width	4,000 px
Image height	3,000 px
Print resolution	300 DPI

Image width

Image height

Print resolution

DPI

300 for photos viewed close; 150 for posters

Maximum print size

13.33 × 10 in(33.9 × 25.4 cm)

12 megapixels at 300 DPI. At 150 DPI it could print 26.7 × 20 in.

Common print sizes

Print	DPI you'd get	Quality
4 × 6 in	667	Excellent
5 × 7 in	571	Excellent
8 × 10 in	375	Excellent
11 × 14 in	273	Good
16 × 20 in	188	OK at a distance
24 × 36 in	111	Low

About the Print Size Calculator (Pixels to Inches)

Enter an image's width and height in pixels and the print resolution in DPI. The calculator gives the largest sharp print size in inches and centimetres, and the size at 150 DPI for posters.

Print size = pixels ÷ dots per inch. Photo labs recommend about 300 DPI for prints viewed up close; 150–200 DPI is fine for posters seen from a distance. A 12-megapixel phone photo (4000 × 3000) prints sharply at about 13 × 10 in.

The formula

Inches = pixels ÷ DPI; DPI = pixels ÷ inches

Worked example

A 12-megapixel photo, 4000 × 3000 pixels, at 300 DPI

4000 ÷ 300 = 13.33 in; 3000 ÷ 300 = 10 in
13.33 × 10 in (33.9 × 25.4 cm)
At 150 DPI: 26.7 × 20 in

Questions people ask

Does changing DPI in software improve quality?

No, only more pixels do.

What DPI for a billboard?

Very low, 10–30 DPI, because it's seen from far away.