Enter the weight of the item you are mailing and the value of a single stamp to determine the number of stamps needed for postage.
Stamps Per Weight Formula
The following formula is used to calculate the number of stamps needed based on the weight of the item and the stamp value.
SN = ceil(W / SV)
Variables:
- SN is the number of stamps needed
- W is the weight of the item (ounces)
- SV is the stamp value (ounces per stamp)
To calculate the number of stamps needed, divide the weight of the item by the value of a single stamp and round up to the nearest whole number.
What is Stamp Value?
Stamp value refers to the weight that a single stamp can cover for postage. In the United States, for example, a standard “Forever” stamp covers the postage of a letter weighing up to 1 ounce. If the letter weighs more, additional postage is required, which can be covered by additional stamps or higher value stamps.
How to Calculate Stamps Needed?
The following steps outline how to calculate the number of stamps needed for postage.
- First, determine the weight of the item (W) in ounces.
- Next, determine the value of a single stamp (SV) in ounces per stamp.
- Use the formula SN = ceil(W / SV) to calculate the number of stamps needed (SN).
- Finally, round up the result to the nearest whole number to find out how many stamps you need to apply.
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
Weight of the item (W) = 2.5 ounces
Value of a single stamp (SV) = 1 ounce per stamp
