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If you go to the US Post Office website, usps.com, they have a calculate postage tab. You can put in the weight and zip code info and it will tell you how much it would cost using the different types of service from first class, priority mail, flat rate boxes, express mail or parcel post. It also calculates deivery times. This has been around for years, suprise people don't use it instead of asking strangers what it cost.