Hard to say
Since it depends if we are talking about acutely, where it takes twice as much Clonazepam
to equal the clinical effects of lorazepam
However, once Clonazepam reaches it's steady state, it is actually twice a potent as lorazepam. So, initially you might need 3 mg of Clonazepam four times a day for the first day to feel the same effects, but you quickly have to reduce down to 1 mg three time/d.