Book Value Per Share Calculator

Book value per share is what each common share would receive if assets were sold at their recorded values and debts paid. $400 million of equity across 50 million shares is $8, and a $12 price gives a price-to-book ratio of 1.5. Price-to-book is most meaningful for banks, insurers and asset-heavy companies. A ratio below 1 suggests the market values the equity below its recorded worth, which can signal a bargain or a real problem.

Book Value Per Share Calculator: inputs

Calculated result
Book value per share$8.00
Price-to-book ratio1.50×

Book Value Per Share Calculator: Shareholders' equity sensitivity

Book Value Per Share Calculator: Shareholders' equity and Book value per share5 calculations vary the “Shareholders' equity” input while holding the other entered inputs constant.$320,000,000$6.40$360,000,000$7.20$400,000,000$8.00$440,000,000$8.80$480,000,000$9.60

Book Value Per Share: formula

Book value per share = (shareholders' equity − preferred equity) ÷ common shares outstanding; P/B = price ÷ book value per share

OpenStax Principles of Finance: the balance sheet

Book Value Per Share: worked example

Shareholders' equity$400,000,000
Preferred equity$0.00
Common shares outstanding50,000,000
Share price$12
Book value per share$8.00
Price-to-book ratio1.50×

Accounting book value can differ greatly from market value: assets are recorded at historical cost, and intangibles like brands and software are often missing. It is a poor guide for asset-light or fast-growing businesses. Share buybacks can shrink equity and inflate the ratio without changing the business.

Compare only within the same industry.

Book Value Per Share: changing Shareholders' equity

Shareholders' equityBook value per sharePrice-to-book ratio
$320,000,000$6.401.88×
$360,000,000$7.201.67×
$400,000,000 (example)$8.001.50×
$440,000,000$8.801.36×
$480,000,000$9.601.25×

Book Value Per Share: compare input ranges

InputTested fromToBook value per share: low inputBook value per share: high inputSwing
Common shares outstanding45,000,00055,000,000$8.89$7.27$1.62 (20%)
Shareholders' equity$360,000,000$440,000,000$7.20$8.80$1.60 (20%)
Preferred equity-$1.00$1.00$8.00$8.00$0.00
Share price$11$13$8.00$8.00$0.00

Book Value Per Share: individual input comparisons

InputValueBook value per sharePrice-to-book ratio
Shareholders' equity$320,000,000$6.401.88×
$360,000,000$7.201.67×
$400,000,000$8.001.50×
$440,000,000$8.801.36×
$480,000,000$9.601.25×
Preferred equity-$2.00$8.001.50×
-$1.00$8.001.50×
$0.00$8.001.50×
$1.00$8.001.50×
$2.00$8.001.50×
Common shares outstanding40,000,000$101.20×
45,000,000$8.891.35×
50,000,000$8.001.50×
55,000,000$7.271.65×
60,000,000$6.671.80×
Share price$10$8.001.25×
$11$8.001.38×
$12$8.001.50×
$13$8.001.63×
$14$8.001.75×

Book Value Per Share: combined input changes

Shareholders' equity / Common shares outstanding40,000,00050,000,00060,000,000
$320,000,000$8.00$6.40$5.33
$360,000,000$9.00$7.20$6.00
$400,000,000$10$8.00$6.67
$440,000,000$11$8.80$7.33
$480,000,000$12$9.60$8.00

Book Value Per Share: which assumptions move the result?

Book Value Per Share: Book value per share as Common shares outstanding changesBook value per share starts at $10. Moving Common shares outstanding from 40,000,000 to 60,000,000 changes it to $6.67, with Shareholders' equity $400,000,000; Preferred equity $0.00; Share price $12 kept fixed.40,000,000$1045,000,000$8.8950,000,000$8.0055,000,000$7.2760,000,000$6.67
Chart quantityDisplayed settings
Common shares outstanding40,000,000 → 60,000,000
Book value per share$10 → $6.67
Shareholders' equity$400,000,000
Preferred equity$0.00
Share price$12
Book Value Per Share: Book value per share as Shareholders' equity changesBook value per share starts at $6.40. Moving Shareholders' equity from $320,000,000 to $480,000,000 changes it to $9.60, with Preferred equity $0.00; Common shares outstanding 50,000,000; Share price $12 kept fixed.$320,000,000$6.40$360,000,000$7.20$400,000,000$8.00$440,000,000$8.80$480,000,000$9.60
Chart quantityDisplayed settings
Shareholders' equity$320,000,000 → $480,000,000
Book value per share$6.40 → $9.60
Preferred equity$0.00
Common shares outstanding50,000,000
Share price$12

Book Value Per Share: values and definitions

Quantity and definitionValue used
Shareholders' equity$400,000,000
Preferred equity$0.00
Common shares outstanding50,000,000
Share price$12
Book value per share$8.00
Price-to-book ratio1.50×

Book Value Per Share: half and double Common shares outstanding

Common shares outstandingBook value per share
25,000,000$16
50,000,000$8.00
100,000,000$4.00

Shareholders' equity is total assets minus total liabilities on the balance sheet, and preferred equity is subtracted because it belongs to preferred holders. Common shares outstanding and the share price complete the inputs. Use the most recent quarter's balance sheet for both equity and share count.

For companies with large intangible assets, some analysts use tangible book value, which removes goodwill.

Common error: Treating book value as what the assets would fetch. Recorded values lag real ones, and a firm's brand, software or customer base often sits nowhere on the balance sheet.

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Book value per share is what each common share would hold if the company sold its assets at their recorded values and paid off everything it owes. With $400 million of equity across 50 million shares, that is $8. A $12 share price then trades at 1.5 times book.

Asset-heavy businesses such as banks and utilities are usually judged this way, while software firms rarely are.

Subtract preferred equity before dividing. Those holders have a prior claim, so the common shares own only what is left.

The Graham number combines book value with earnings, and the P/E ratio calculator covers the earnings side. The market cap page adds debt and cash, and the EPS calculator gives earnings per share. For financial firms, price-to-book alongside return on equity is a standard pairing.

What does a price-to-book ratio below 1 mean?

The stock trades below the accounting value of its net assets. It can be a bargain, or a sign the market expects the assets to lose value or the business to earn poor returns.

Why is book value less useful for tech companies?

Their main assets, such as software, brand and talent, are not fully recorded on the balance sheet, so book value understates what the business is worth.

What is tangible book value?

It is book value minus intangible assets such as goodwill, showing what shareholders would own if only physical and financial assets counted.