There are lots of conversion programs online or just type "convert x meters per second to knots" into the Google or Bing search window and Google/Bing will convert.

e.g. {convert 5 meters per second to knots} produces the following result from Google: 5 (meters per second) = 9.71922246 knots

Click below link to see it for yourself.

Bing Calculator

http://www.bing.com/search?q=convert+5+meters+per+second+to+knots&src=IE-SearchBox&FORM=IE8SRC