I am just about ready to rack my beer after primary fermentation. Since
my wife has thrown away the instrucations, I am not sure exactly how
much priming sugar to use!

I'll be using standard white granulated sugar (I know that there are
better alternatives, but this is what I will be using!)

How much sugar should I use as to not over-carbonate? I will be
rackinging into a 5 gallon plastic keg.

My last set of instructions for a previous beer advised about 1/2
teaspoon per pint. Other instructions I have found online suggest about
4 tablespoons total.

Anyone advise a decent amount?

Thanks