Hi dears, Hope you all programmers will be fine. I am here with a problem. I am going to calculate the freight base US rates calculation between 2 zip codes. Any body can know about that or have done such type of stuff. I am looking for the formula for base rate calculation on the basis of zip codes. The parameters required are, origin Zip destination Zip Weight Freight Class Discount. Most of the sites like htt://www.bulletfreight.com and other have implemented it. But i don't know that how the base rate between 2 zip codes is calculated. Plz Help. If any body have a database of us zip codes base rates. Please provide me. Thanks in advance. Sohail Khan