Originally Posted by
noglider
There is no sense in doing this. The gear ratio you get is not actually about the number of teeth, it's the ratio of diameters of the chainring and cog. So a 44 in front and 22 in back with a 1/2" chain is equivalent to a 22 in front and an 11 in back with a 1" chain. No advantage to the 1" pitch. And you cannot get an cog that is equivalent in size to a 19 because 19 is not evenly divisible by 2.
OP didn't say they was looking for a different gear ratio. You're right about the results of course - counting teeth is just an easy substitute for measuring the diameter. It's such an odd question thought it makes me think they might have other reasons. And if not - it's just ignorance.