Stimulants Dose different or same with oral meth?

Sorry if this is not the right spot to ask this. I was just wanting to ask about dosage for orally taking meth. I usually snort it. I've done every ROA except plugging and I have only done orally twice and both times my friends put the amount in it for me. I use about twice a day sometimes more depending on if I want to stay up or not. I just snorted a line nothing to big but im not feeling very much. I was wondering how much should I eat? Should I do about as much as I usually snort?

I'd go with a bit less, oral bioavailability is higher than that of snorted.