To convert your measurement units:
http://www.convertit.com
To find out about weather in Istanbul:
http://www.wunderground.com/global/stations/17062.html
To find about weather in Antalya:
http://www.wunderground.com/global/stations/17300.html
To find about visa requirements and other information on Turkey:
http://www.mfa.gov.tr/consular.htm
