Tell us about yourself!
The American Test Kitchen, while doing umpteen batches of biscuits in one of their endless tests, finally allowed common sense to prevail. After kneading and rolling out the dough, they simply CUT THE BISCUITS IN SQUARES. No circles, no gathering and re-rolling scraps into inedible hockey pucks. Free yourself from a meaningless tradition!
Use the several approximations--JGDean's is the best--or do the smart thing and buy a scale.