How do you calculate stockholders equity?

You can get the Stockholders Equitys by finding out what the preffered and common stocks are at par value which is the minimum a company can issue their stocks for. Then figuring out the additional paid in capital which is the market price minus the par value for both the preffered and common stock. Once you find that, you add retained earnings. If the retained earnings is not given, then you take your net income minus dividends and treasury stock.