Price to Book Ratio Calculator

Fundamental Value Investing & Price-to-Book Analysis

The Price-to-Book Ratio compares a company's total market valuation against its net accounting book value (total assets minus total liabilities and intangible assets).

Core P/B Valuation Equations

• Per-Share P/B: P/B = Market Price per Share (PPS)Book Value per Share (BVPS)

• Aggregate Balance Sheet P/B: P/B = Market CapitalizationTotal Stockholders' Equity

• Book Value per Share: BVPS = Total Stockholders' Equity - Preferred EquityN_common shares outstanding

• Market Premium / Discount: \%_premium = 100

• Return on Equity (ROE) Relationship: P/B = P/E Ratio × ROE

Interpreting P/B Across Economic Sectors

• P/B < 1.0 (Discount to Book): The market values the company at less than its physical net assets. Often seen in cyclical downturns, distressed companies, or deep value turnaround candidates.

• Commercial Banks & Insurers: P/B is the premier valuation metric for financial institutions because their balance sheets consist almost entirely of mark-to-market liquid financial assets (typical benchmark 0.8x to 1.5x).

• Technology & Capital-Light Firms: Software companies (e.g. Microsoft, Apple) often trade at 10x to 40x P/B because their primary value drivers (patents, software IP, brand moat) are not recognized as physical balance sheet assets.

How to Use This Calculator

Enter your Valuation Input Basis — choose from Per-Share Basis (Market Share Price & BVPS), Balance Sheet Basis (Market Cap & Stockholders' Equity), Market Share Price () (e.g. 75.00 in ), Book Value Per Share (BVPS) (e.g. 30.00 in /share), Total Market Capitalization () (e.g. 15000000000 in ), and Total Stockholders' Equity (Net Assets) (e.g. 6000000000 in ). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

Formula Reference: Price to Book Ratio Calculator

Input variables:

inputMethod — Valuation Input Basis

sharePrice — Market Share Price ()

bookValuePerShare — Book Value Per Share (BVPS)

marketCap — Total Market Capitalization ()

totalStockholdersEquity — Total Stockholders' Equity (Net Assets)

Computed outputs:

priceToBookRatio — Price-to-Book Ratio (P/B)

computedBvps — Book Value Per Share (BVPS)

marketPremiumDiscountPct — Market Premium / Discount vs Book

Mathematical relationships extracted from calculation logic:

premiumPct = (pb - 1) * 100

Standard: NIST Handbook 44 and BIPM SI unit definitions

Worked Example

Analyzing a regional bank stock trading at 75.00 with a book value per share of 30.00: Generates a P/B ratio of 2.50x, reflecting a 150.0% premium above accounting equity.

Understanding Your Result

Percentages are relative values — context determines what is "good" or "bad." A 50% discount is significant; a 50% failure rate is alarming. Percentage change and percentage points are different: moving from 4% to 5% is a 1 percentage point increase, but a 25% relative increase. When comparing percentages across different base values, always check whether absolute differences are meaningful — a 10% improvement on a large base creates more absolute value than 10% on a small base.