Postage Rates 2025 Per Ounce Calculator. If you want particular postage, the most convenient option is to purchase. Anything larger will necessitate additional postage, which you may calculate using a postage calculator.
Find what the current price of a stamp is, how much it costs to send letters, and size/weight limits. If you want to know how much a postage stamp costs right now, here are the usps current postage rates and stamp prices.