Earnings Per Share Calculator
Calculate basic and diluted EPS from net income, preferred dividends, and shares outstanding. Enter values for instant results with step-by-step formulas.
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Basic EPS divides earnings available to common shareholders by the weighted average common shares outstanding. Diluted EPS uses the same numerator but includes all potentially dilutive securities in the denominator. P/E Ratio = Stock Price / EPS. PEG Ratio = P/E / EPS Growth Rate.
Last reviewed: December 2025
Worked Examples
Example 1: Basic and Diluted EPS Calculation for a Growth Company
Example 2: EPS Growth Analysis and PEG Ratio Valuation
Background & Theory
The Earnings Per Share Calculator applies the following established principles and formulas. Foreign exchange markets facilitate the conversion of one currency into another and serve as the largest and most liquid financial markets in the world, with daily turnover exceeding seven trillion US dollars. Exchange rates are quoted as currency pairs, expressing the price of one unit of a base currency in terms of a quote currency. For example, a EUR/USD rate of 1.0850 means one euro buys 1.0850 US dollars. The smallest standardized price movement in most pairs is the pip, typically the fourth decimal place, with a value of 0.0001 per unit for USD-denominated pairs. The bid price is the rate at which a dealer will buy the base currency, while the ask price is the rate at which it will sell. The spread between bid and ask represents the dealer's compensation and varies with liquidity and volatility. Leverage amplifies both gains and losses by allowing traders to control positions larger than their deposited margin. A 100:1 leverage ratio means a one-percent adverse move eliminates the entire margin, making position sizing and risk management critical. Two parity conditions from international economics anchor exchange rate theory. Purchasing Power Parity (PPP) holds that exchange rates should adjust over time so that identical goods trade at equivalent prices across countries: S = P_d / P_f, where S is the spot rate and P_d and P_f are domestic and foreign price levels. PPP performs well over long horizons but poorly in the short run due to trade barriers, non-tradable goods, and capital flows. Covered Interest Rate Parity (CIRP) is a near-arbitrage condition stating that forward exchange rate premiums or discounts exactly offset interest rate differentials between two currencies: F/S = (1 + r_d) / (1 + r_f). Deviations from CIRP create riskless arbitrage opportunities that traders rapidly eliminate. Uncovered Interest Rate Parity posits that high-yielding currencies should depreciate to offset their interest advantage, though empirical evidence is mixed and the carry trade — borrowing in low-rate currencies to invest in high-rate ones — has generated persistent returns.
History
The history behind the Earnings Per Share Calculator traces back through the following developments. For much of the nineteenth century and early twentieth century, the international monetary system operated under the classical gold standard, under which each participating currency was fixed to a defined weight of gold, making bilateral exchange rates effectively constant. The system provided price stability and facilitated global trade but constrained governments' ability to respond to economic downturns. World War One shattered the gold standard as nations suspended convertibility to finance wartime expenditures. The interwar period saw attempts to restore gold convertibility, most notably the British return to the gold standard in 1925 at the pre-war parity, a decision criticized by John Maynard Keynes as deflationary. The Great Depression forced widespread currency devaluations and the effective collapse of the international gold standard by the early 1930s. The Bretton Woods Conference of July 1944 established a new order in which member currencies were pegged to the US dollar, while the dollar alone was convertible into gold at 35 dollars per troy ounce. The International Monetary Fund and World Bank were created at the same conference to oversee the system. Bretton Woods delivered exchange rate stability during the postwar growth era but came under strain as US deficits and European dollar accumulation outpaced American gold reserves. On August 15, 1971, President Nixon announced the suspension of dollar-gold convertibility — the so-called Nixon Shock — effectively ending the Bretton Woods system. By 1973, major currencies had transitioned to floating exchange rates determined by market supply and demand, a regime that has persisted. On September 16, 1992, hedge fund manager George Soros shorted the British pound against the European Exchange Rate Mechanism constraints, forcing the UK's withdrawal in what became known as Black Wednesday. Electronic trading platforms emerged in the 1990s and 2000s, replacing voice-brokered interbank markets and dramatically reducing transaction costs for institutional and retail participants alike.
Key Features
- Calculate compound interest and future/present value for any combination of principal, rate, compounding frequency, and time horizon to project investment growth accurately.
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- Compute dividend yield, payout ratio, and earnings per share to compare income-generating stocks and assess dividend sustainability.
- Calculate CAGR and annualized total return for any holding period, normalizing performance across investments with different time frames.
- Generate complete mortgage amortization schedules showing principal and interest breakdown for every payment, plus total interest paid over the loan life.
- Project retirement savings balances with configurable contribution amounts, employer match rates, annual raises, and withdrawal start dates.
- Compare after-tax returns across account types (taxable, Roth, traditional IRA/401k) to identify the most tax-efficient placement for each asset class.
Frequently Asked Questions
Formula
Basic EPS = (Net Income - Preferred Dividends) / Weighted Average Common Shares Outstanding
Basic EPS divides earnings available to common shareholders by the weighted average common shares outstanding. Diluted EPS uses the same numerator but includes all potentially dilutive securities in the denominator. P/E Ratio = Stock Price / EPS. PEG Ratio = P/E / EPS Growth Rate.
Worked Examples
Example 1: Basic and Diluted EPS Calculation for a Growth Company
Problem: A technology company reports net income of $50 million, preferred dividends of $2 million, 10 million basic shares, and 12 million diluted shares (including 2 million from stock options). Stock trades at $80.
Solution: Earnings Available = $50,000,000 - $2,000,000 = $48,000,000\nBasic EPS = $48,000,000 / 10,000,000 = $4.80\nDiluted EPS = $48,000,000 / 12,000,000 = $4.00\nDilution Impact = ($4.80 - $4.00) / $4.80 = 16.7% reduction\nP/E Ratio (Basic) = $80 / $4.80 = 16.67x\nP/E Ratio (Diluted) = $80 / $4.00 = 20.00x\nEarnings Yield = $4.80 / $80 = 6.0%
Result: Basic EPS: $4.80 | Diluted EPS: $4.00 | P/E: 16.67x (Basic), 20.0x (Diluted) | 16.7% Dilution
Example 2: EPS Growth Analysis and PEG Ratio Valuation
Problem: A company had EPS of $3.50 last year and reports current EPS of $4.20. The stock trades at $84. Revenue is $500 million with $60 million net income. Calculate growth rate and PEG ratio.
Solution: EPS Growth = ($4.20 - $3.50) / $3.50 = 20.0%\nP/E Ratio = $84 / $4.20 = 20.0x\nPEG Ratio = 20.0 / 20.0 = 1.00\nEarnings Yield = $4.20 / $84 = 5.0%\nProfit Margin = $60M / $500M = 12.0%\nMarket Cap = $84 x shares outstanding\nForward P/E (at same growth) = $84 / ($4.20 x 1.20) = $84 / $5.04 = 16.67x
Result: EPS Growth: 20.0% | P/E: 20.0x | PEG: 1.00 (Fair Value) | Forward P/E: 16.67x
Frequently Asked Questions
What is earnings per share and why is it the most important profitability metric?
Earnings per share (EPS) measures the portion of a company net income allocated to each outstanding share of common stock, calculated by dividing net income minus preferred dividends by the weighted average number of common shares outstanding. EPS is considered the most important profitability metric because it normalizes earnings across companies of different sizes, enabling direct comparison. A company earning $10 billion with 5 billion shares ($2.00 EPS) is directly comparable to one earning $500 million with 100 million shares ($5.00 EPS). EPS is the denominator in the price-to-earnings ratio, making it the foundation of equity valuation. Wall Street analysts track EPS estimates obsessively, and even small deviations from consensus estimates can cause significant stock price movements.
What is the significance of EPS beats and misses during earnings season?
When a company reports quarterly EPS above analyst consensus estimates (a beat) or below (a miss), it can trigger significant stock price movements because EPS surprises force analysts to update their valuation models and price targets. Historical data shows that stocks beating EPS estimates by more than 5% outperform the market by an average of 2-3% in the following month, while misses of similar magnitude underperform by a comparable amount. However, the magnitude of the price reaction depends heavily on the quality of the beat or miss. Revenue-driven EPS beats (higher sales) are valued more than cost-cutting beats. Forward guidance often matters more than the actual EPS number, with companies guiding above consensus seeing larger positive reactions than the EPS beat alone would warrant. Institutional investors track earnings revision momentum as a systematic factor.
How do I verify Earnings Per Share Calculator's result independently?
The Formula section on this page shows the equation used. You can reproduce the calculation manually or in a spreadsheet using those steps. Compare your answer against the worked examples in the Examples section, which use known reference values so you can confirm the calculator is behaving as expected.
What inputs do I need to use Earnings Per Share Calculator accurately?
Each field is labelled with the required unit (metric or imperial). Gather your source values before starting — for example, a weight measurement in kilograms, a distance in metres, or a dollar amount — and enter them exactly as measured. The formula section on this page lists every variable and explains what each represents.
Is my data stored or sent to a server?
No. All calculations run entirely in your browser using JavaScript. No data you enter is ever transmitted to any server or stored anywhere. Your inputs remain completely private.
How do I interpret the result?
Results are displayed with a label and unit to help you understand the output. Many calculators include a short explanation or classification below the result (for example, a BMI category or risk level). Refer to the worked examples section on this page for real-world context.
References
Reviewed by Daniel Agrici, Founder & Lead Developer · Editorial policy