Earnings Per Share (EPS) Calculator
Calculate basic EPS, diluted EPS, P/E ratio, and EPS growth rate.
Essential for evaluating a company's profitability and stock valuation.
Why EPS Matters
Earnings Per Share is the single most important profitability metric in fundamental stock analysis. It tells you how much profit a company generates for each share outstanding — making it directly comparable across companies of different sizes.
Wall Street analysts forecast EPS quarters in advance. When a company beats EPS estimates, the stock often surges. When it misses, it often drops — even if the absolute profit was high. The surprise is what moves prices.
The Formulas
Basic EPS: Basic EPS = (Net Income − Preferred Dividends) ÷ Weighted Average Common Shares
Diluted EPS: Diluted EPS = (Net Income − Preferred Dividends) ÷ (Weighted Avg Shares + Dilutive Securities)
Dilutive securities include stock options, warrants, and convertible bonds — instruments that could become shares and dilute existing shareholders.
P/E Ratio (Price-to-Earnings): P/E = Stock Price ÷ EPS
EPS Growth Rate: EPS Growth = (Current EPS − Prior EPS) ÷ |Prior EPS| × 100
Forward P/E: Forward P/E = Stock Price ÷ Expected Next-Year EPS
P/E Ratio Interpretation Table
| P/E Range | Typical Profile |
|---|---|
| Below 10x | Deep value or declining business |
| 10x – 15x | Value stocks, mature industries |
| 15x – 20x | Market average (S&P 500 historical ~18–20x) |
| 20x – 30x | Quality growth companies |
| 30x – 50x | High-growth stocks (tech, biotech) |
| 50x+ | Speculative growth or turnaround plays |
Basic vs Diluted EPS
Basic EPS uses only shares currently outstanding. Diluted EPS assumes all options, warrants, and convertible securities are exercised — giving a more conservative, “worst case” picture.
Professional investors always prefer diluted EPS. A large gap between basic and diluted EPS signals heavy dilution risk from employee stock options or convertible debt.
GAAP vs Non-GAAP EPS
Companies often report two EPS figures:
- GAAP EPS includes all expenses (stock comp, restructuring, amortization).
- Non-GAAP EPS strips out “one-time” items, making profits look higher.
Always compare apples to apples — GAAP to GAAP across companies.
Worked Example (Apple-style)
- Net income: $100 billion
- Preferred dividends: $0
- Weighted average shares: 15.8 billion
- Dilutive securities (options): 0.2 billion
- Stock price: $185
- Prior year EPS: $5.80
Basic EPS = $100B ÷ 15.8B = $6.33 Diluted EPS = $100B ÷ 16.0B = $6.25 P/E Ratio = $185 ÷ $6.33 = 29.2x EPS Growth = ($6.33 − $5.80) ÷ $5.80 × 100 = +9.1%
At 29.2x P/E with ~9% EPS growth, this is a quality company trading at a premium multiple — typical of large-cap tech with dominant market position.