Megapixels Chart
Each colored box represents a certain number of
megapixels. The numbers along the top and left side are
print dimensions in inches at 300ppi (pixels
per inch). Most books and magazines require 300ppi for
photo quality. For example, the chart shows that you can
make a 5" x 7" photo quality print from a 3 megapixel
camera.
inches @ 300ppi (numbers inside colored boxes are megapixels)
Notice that as the print size doubles, the megapixels
required increases geometrically. You can make nice 8" x 10"
prints with a 6 or 8 megapixel camera, but to make a true
photo quality 16" x 20" print, you need between 24 and 30
megapixels. Don't be fooled by manufacturers' claims that
say you can make 16" x 20" prints from an 8 megapixel
camera. While you certainly can make a print that
size, it will not be true photo quality.
Here's why:
- A megapixel is 1 million pixels. It's an area measurement like square feet.
- A typical 8 megapixel camera produces images that
are 3266 x 2450* pixels.
If you multiply 3266 by 2450, you get 8,001,700 or 8 million pixels. - To find the largest photo quality image you can
print, simply divide each dimension by 300:
3266 / 300 = 10.89 inches
2450 / 300 = 8.17 inches
- If you are not publishing your images in a book
or magazine, and you're just making prints for yourself
or your friends, you can "cheat". Good quality inkjet
printers can make a nice looking print at 250 or 200ppi.
At 200ppi, the maximum print size becomes:
3266 / 200 = 16.33 inches
2450 / 200 = 12.25 inches
- If you know how to use image editing software like Photoshop, you can "cheat" even more by increasing the image size, and even doubling the number of pixels in the image. The quality of the camera and lense becomes more important at this point bacause any loss of detail or sharpness is magnified. If an image is enlarged too much in this manner, it will look "fuzzy" or "pixelated".
Megapixels vs. Maximum Print Size Chart
| Megapixels | Pixel Resolution* | Print Size @ 300ppi | Print size @ 200ppi | Print size @ 150ppi** |
3 |
2048 x 1536 | 6.82" x 5.12" | 10.24" x 7.68" | 13.65" x 10.24" |
4 |
2464 x 1632 | 8.21" x 5.44" | 12.32" x 8.16" | 16.42" x 10.88" |
6 |
3008 x 2000 | 10.02" x 6.67" | 15.04" x 10.00" | 20.05" x 13.34" |
8 |
3264 x 2448 | 10.88" x 8.16" | 16.32" x 12.24" | 21.76" x 16.32" |
10 |
3872 x 2592 | 12.91" x 8.64" | 19.36" x 12.96" | 25.81" x 17.28" |
12 |
4290 x 2800 | 14.30" x 9.34" | 21.45" x 14.00" | 28.60" x 18.67" |
16 |
4920 x 3264 | 16.40" x 10.88" | 24.60" x 16.32" | 32.80" x 21.76" |
| 35mm film, scanned | 5380 x 3620 | 17.93" x 12.06" | 26.90" x 18.10" | 35.87" x 24.13" |
*Typical Resolution. Actual pixel dimensions vary from
camera to camera.
**At 150ppi, printed images will have visible pixels and
details will look "fuzzy".