i'm trying to find or figure out if its even possible to do this, what i'm looking for is a script that calculates distance between a set address and the address input by a user, then calculates a delivery cost based on variables of milage and the amount of product.

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I don't know if it is possible in 100% but i know google maps has an API you can use to mark places and routes and maybe distance is also a feature.

Search for google maps API and also try yahoo maps service they have something looks the same to google maps but i don't know if they support API as well.

Good luck and if you have any progress write it here it will be intresting.

Hi,

Answer: yes, it's definitely possible.

Question: are you doing the deliveries yourself, or via a service?

1] If the deliveries are via UPS/Fedex/USPS, then why not plug in to one of their API's to get the delivery rates automatically? That seems much more reliable than doing the calculation yourself.

2] If you want to do the calculation independently, I think you'll need to get a zip code database of latitudes. There are many such databases available. Do a google search for "zip code radius" (many services market the databases toward companies that want to add a "find stores near you" function to their websites). Usually the database providers will include the php/asp scripts for calculating the distance/radius figures.

If the deliveries are local, then the Google API is probably the best bet, as Aryex already mentioned.

Hope that helps.