To log in to the site you need to click on the button "Login" in the upper part of the site — in the header, or go to this page .
Choose the most convenient method of authentication: a previously created account (how to register read more ) or favorite social network.
If You're already logged in, then the header will be active the button "Exit". Next to the button "Exit" will be located an inscription with the name of your login in the Service Kalk.Pro. Tapping/clicking on Your username in the header of the website will take You to the page "Personal profile" which will include: account information, personal data, bookmarks, raschetami, the list of widgets and applications.