What pixel size for printing photos?

We get this question a lot. How many pixels will make a photo 4″x6″ or some other size. What is
the conversion from pixels to inches?

The answer is usually the more the merrier. The printer software should be able to scale the image
best to fit the paper. There is a recommended minimum say 540×360 for 4×6 pictures.. But, higher
is better.

When printing, use no margins, and scale the image to fit the paper.