Just one. It has to be worth 42 cents. That is the rate for first class mail anywhere in the U.S. You can also use any combination of stamps that add up to 42 cents. Stamps come in many denominations from one cent on up. Asking "how many stamps" is like asking "how many coins for a candy bar?" It depends on the value of the coins.
Go to www.usps.com and then click in calculate postage.
For a regular letter? Just one.
A single First Class stamp is adequate for a one ounce regular letter.
Regular size letter up to 1 oz needs a 42 cents stamp.
what the price to mail letter to
One.
1
how many stamps does it take from vancouver to california
one. number of stamps is determined by weight, not distance
you need ten stamps actually i don't know
One.
6
For a regular letter, two.