Use this speed test giude
this has the best interface & produces the most accurate among all the test sites I’ve tested
MySpeed Bandwidth Test, Internet Speed Test, Broadband Speed Test
speedtest.net works out the best as it gives ping + ul + dl + distance from the speed tester etc highly detailed and good lookin site too 
there is one site Home of Gibson Research Corporation there they will test your ports:clap:
For airtel here is their IP address =59.144.47.27
I am using 2mbps line and on the airtel site i am being shown arnd 2mbps,while on Speedtest it shows arnd 1mbps download speed… i Checked it at 845PM this was the speed on speedtest arnd 1mbps… 
Will check in the night,Might be the accurate speed may come…
i m using bsnl
me too using BSNL
got the following results, when i am running utorrent in background
Mumbai - 
USA - 
well there are so many sites who gives various information.
Sometimes they ll give the right information but not all the time.
online tests are taking very few transaction (eg 150 kb of file transfer/ for some ms )
As your Internet usage changes sec by sec, the speed of your connection varies.
But you can use some online gadget like " yahoo gaget engine " it will provide you the accurate data transfer rate as long as you are using internet with out hampaering your connection.
you can go for online also like Speedtest.net - The Global Broadband Speed Test for right information.
as the above site takes larger file for test and gives you the full summary of test.
From Mumbai Server : 
From US Server : 
Both the tests were done after deleting browser cache.
I’d recommend this site for tweaking and speed test, Speed tests and problem diagnosis tools - dslreports.com
how are u all guys managing such high speeds from bsnl??
take a look
mine is in my sig 
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