[KeeNeow]

The conversion is 8 bits equals a byte so have to divide the bps rate by 8 to get Bps or 8000 to get kBps.
In my condo i have the 6mbps ADSL internet from TOT which costs 738 baht per month.
The last download test on thaivisa.com gave me 5576kbps(697kBps) download from their Bangkok server and 330 kbps(41.3kB/sec) Upload speed
If you connect to a server in the USA or UK you will get a slower speed maybe about 50% or less.
Mostly I download movies from pirate bay and will get about 450kBps maximum but probably average about 200kBps so can download a 500 MB movie in about 40 mins.
Thailand technically has 3.5G which offer wireless speeds of up to 500kBps( 3G is only 200kBps) but will depend upon if you are in the right location and will probably be 2G speeds most of the time which is only half as fast so you will be getting 100kB/sec.
So until the 3.5G service is universal I would recommend getting a landline ADSL service. Only disadvantage is that I think you have to have a one year contract to get it.