To print an image for publication in a magazine or book, experts agree that you need 300PPI for best results.
To find out the largest size you can print out an image which was saved at 300PPI, divide the image's pixel dimensions (horizontal and vertical) by 300.
Megapixels*
Pixel Dimensions**
Print Size at 300ppi
Inches
Centimeters
(divide pixels by 300)
(multiply inches by 2.54)
3
2048 x 1536
6.82" x 5.12"
17.32 x 13.00
4
2464 x 1632
8.21" x 5.44"
20.85 x 13.82
6
3008 x 2000
10.02" x 6.67"
25.45 x 16.94
8
3264 x 2448
10.88" x 8.16"
27.64 x 20.73
10
3872 x 2592
12.91" x 8.64"
32.79 x 21.95
12
4290 x 2800
14.30" x 9.34"
36.32 x 23.72
16
4920 x 3264
16.40" x 10.88"
41.66 x 27.64
20
5460 x 3660
18.20" x 12.20"
46.23 x 30.99
24
6000 x 3990
20.00" x 13.30"
50.80 x 33.78
30
6690 x 4470
22.30" x 14.90"
56.64 x 37.85
36
7320 x 4860
24.40" x 16.20"
61.98 x 41.15
44
8130 x 5400
27.10" x 18.00"
68.83 x 45.72
* Pixels x pixels = Megapixels (i.e. 2048 x 1536 = 3 Megapixels)
** Typical Dimensions. Actual pixel dimensions vary from camera to camera.