Book value per equity and book value per share; its importance

 In accountancy 'book value' is the value of an asset as per balance sheet. It is also called carrying value or net asset value, which is equal to the original cost of the asset less any accumulated depreciation, amortization or impairment costs made against the asset.
 In share market traders use book value to determine the safety level of shares after the payment of all debts.
 Total Book value of an equity is the value that the equity worth after the repayment of all debts and liquidation of all assets.
 Total Book value of equity is calculated by the following formula,
 Total Book value of an equity= Book value of assets- Book value of liabilities

 Book value of all Common shares is calculated as
 Book Value of Equity- Book Value of Preferred Stocks

Book value per share is defined as the value, that share worth after repaying all debts and liquidating all its assets.
  Book value per Common share is calculated by using the following formula
 Book Value per Common Share = (Total stock holder's equity- Preferred Equity)/(Total Number of outstanding Shares)