I'm making a simple bar height laptop table for a record store. I'm using a metal base and a wood top.

She wants a ~20 inch deep top and 60 inch wide, 42 inch tall.

I'm thinking I'll put some sand in the base for weight. Anyway, this question has come up in my mind a few times: is there a rule for depth of top and height vs the base?

Maybe that's badly worded, but I'm wondering if there is a quick way to know if something will tip when leaned on.