need help with using irfanview enlarging images for prints

[allstar]

I have a bunch of files that ar 600x400 and close to , dpi shows 100 on most , what do i have to do to resize/resample these for 8x10 quality prints from irfanview??? or if there is a better way? thanks from a newbie.

[HaraldHeim]

Unfortunately Irfanview does not let you enter print size and dpi under Image > Resize/Reample, so you need to calculate the appropriate pixel values yourself. Assuming you want to print 8 x 10 inch at 300 dpi, you would need to enlarge your images to 2400 x 3000 pixel.

The formulas are:
pixel height = print height in inch * dpi value
pixel width = print width in inch * dpi value