what is the media mail postage rate
Round up the weight of your package to the next pound. For example, if your package weighs 3 lb. 10-oz., round the weight of your package to 4 lb. to calculate media mail postage. Start with the base media-mail postage rate of $2.23 for a 1 lb. package and then add 35 cents for each additional pound. Therefore, our 4-lb. package would cost $3.28 to ship using USPS media mail.