Hello,
I am developing a website using PHP +mysql ...members can come to my site and upload banners to my server. Later they can link back these banners from their websites. Which means every banner on my server can be linked by numerous member websites.

How do i estimate the bandwidth i required for my website?

I need this information to select a host.

-thanks.

How long is a piece of string?


Exactly.

What is meant by my comment is there are innumerable variables.

- how many banners *
- how many visitors at each of the linked site per day
= throughput per day

But daily throughput isn't the only issue to be addressed.
- are the sites time zone driven, will you have peak times?
- how much growth in the business do you expect month to month, year over year?
- what's the impact of downtime

And technology selection can have an impact on performance too.
- how much processing happens on your site when a banner is clicked. a couple of sql queries? 40 queries?
- what technology is driving the processing? CGI? An application server? JSP? PHP? ASP?

etc.

I expect about 2000+ members within 2-3 months.
I am using PHP +mySQL.
Whe na linked banner loads about 3-4 SQL queries occur.
Banners are maximum 20 kb in size.