Book Value Per Share Calculator

Book value per share is the net asset value of a company on a per-share basis. It equals total shareholders' equity minus any preferred equity, divided by shares outstanding. If a company were to liquidate all assets and pay off all liabilities, BVPS represents what common shareholders would theoretically receive per share. It is the accounting value of equity — not the market price.

BVPS = (Total Shareholders' Equity − Preferred Equity) ÷ Shares Outstanding. For example, if a company has $10 billion in equity, $1 billion in preferred equity, and 2 billion shares outstanding, the BVPS is ($10B − $1B) ÷ 2B = $4.50 per share.

A P/B below 1.0 means the stock trades below its net asset value — historically considered attractive, especially for banks and asset-heavy industrials. For technology and consumer companies with large intangible assets, P/B ratios of 4–10× are common because brand value and IP do not appear on the balance sheet. Always compare P/B within the same sector.

It means book value per share is negative, not that the stock trades cheaply. Book value per share turns negative when the preferred claim exceeds total shareholders' equity, and total equity itself turns negative when cumulative buybacks, dividends and write-downs exceed cumulative retained earnings — common among long-established companies that have returned capital for decades. Because price cannot be negative, a negative P/B is always the denominator's sign. The ratio is then outside the usual scale rather than below it: a reading of −4.0× is not below 1.0×, since the same price against a book value of equal size and opposite sign gives +4.0×. This calculator reports the ratio but withholds the P/B tier, the premium-to-book figure and the Graham Number when book value per share is not positive. Price-to-sales, EV/EBITDA and other enterprise-value measures keep their meaning in that situation because none of them divide by common book equity.

The Graham Number is a valuation formula from Benjamin Graham: √(22.5 × EPS × BVPS). It estimates the maximum price a defensive investor should pay for a stock. The 22.5 multiplier comes from Graham's rule that P/E × P/B should not exceed 22.5 (15 × 1.5). Stocks trading well below their Graham Number may correspond to potential undervaluation on Graham's criteria.

BVPS reflects historical cost accounting — it understates assets that have appreciated and ignores intangibles like brand, software, and customer relationships. For technology companies, book value can be nearly meaningless. It is most useful for banks, insurers, real estate, and capital-heavy industrials where balance sheet values are close to market values. It should always be paired with earnings-based metrics like P/E, DCF, and EV/EBITDA.

Equity Rank's consensus valuation blends 8–15 methods per stock, including Price-to-Book, the Graham Number, and sector-adjusted multiples. For asset-heavy sectors (financials, utilities, industrials), P/B receives a higher weight in the consensus. For technology and growth companies, earnings-based methods like DCF and PEG receive more weight. The result is a sector-calibrated fair value estimate.