Abstract: A device for weighing and automatically computing the postage due on all services offered by a postal authority of a given country, both domestically and internationally. The device computes postage due and other varying charges such as insurance and Express Mail and incorporates a spring mounted electronic loadcell weighing mechanism, a weighing platform to allow for accommodation of large mailing pieces, a computer data chip providing country code and postal code (zip code) search features which is reprogrammable in the event of a postage rate or structure change, and a user programmable zip/zone conversion feature to tell the device where it is within a given postal zone system.