Typically you will need three stamps. The first ounce will go for the standard first class postage rate. The second and third ounce will go for a reduced rate. Currently that would be 45 cents for the first ounce and 20 cents each for the second and third.
Currently in the US, the first ounce is 44 cents. The second and additional ounces are 17 cents each. In this case the cost would be 78 cents to mail 2.5 ounces.
89 cents, which is one Forever (47 cent) stamp, plus two extra-ounce (21 cent) stamps. Two Forever stamps could also work, but it would be overpaying by 5 cents.
2
4 stamps
3
4
how many first class stamps does it take to mail a 4 oz letter and package
how many stamps for a 3.4oz envelope
2
two
2.4
78 cents
If you have four 25 stamps and three 30 stamps altogether it would by worth 190.
-2 and 1/2
what stamp amount is needed if the letter is 15 oz.?
Currently in the US up to one ounce is 45 cents. So however many stamps it takes to make that amount.
2 stamps. ! stamp is good for up to one ounce, 21 cents for second ounce.
3 it is 1 stamp/ounce as a rule of thumb