Calculate market cap, enterprise value, P/E, and P/S ratios. Classify stocks by cap tier and compare valuation metrics against major index benchmarks.
Market capitalization — share price multiplied by shares outstanding — is the most fundamental measure of a company's size and total market value. It determines index inclusion, institutional investment eligibility, and risk classification.
Market cap alone doesn't tell the full story. Enterprise value (EV) adds debt and subtracts cash to show what it would cost to acquire the entire business. Valuation multiples like P/E (price-to-earnings) and P/S (price-to-sales) put the market cap in context relative to the company's financial performance.
This calculator computes market cap, enterprise value, key valuation ratios, and classifies the stock into standard cap tiers: Mega Cap ($200B+), Large Cap ($10B+), Mid Cap ($2B+), Small Cap ($300M+), Micro Cap ($50M+), and Nano Cap. The scenario table shows how share price changes affect market cap and tier classification, while benchmark comparisons position your stock relative to major index averages.
Use the preset examples to load common values instantly, or type in custom inputs to see results in real time. The output updates as you type, making it practical to compare different scenarios without resetting the page.
Market cap determines which indexes a stock belongs to, what funds can buy it, and its risk profile. This calculator gives you the full market-cap picture including enterprise value and comparative multiples in seconds.
This tool is designed for quick, accurate results without manual computation. Whether you are a student working through coursework, a professional verifying a result, or an educator preparing examples, accurate answers are always just a few keystrokes away.
Market Cap = Share Price × Shares Outstanding Enterprise Value = Market Cap + Total Debt − Cash + Preferred Stock P/E = Share Price / EPS P/S = Market Cap / Annual Revenue EV/Revenue = Enterprise Value / Revenue
Result: Market Cap = $22.5B (Large Cap), P/E = 21.4×
$45 × 500M shares = $22.5B market cap, placing it in the Large Cap tier. At $2.10 EPS, the P/E ratio is 21.4× — roughly in line with the S&P 500 average.
Use consistent units throughout your calculation and verify all assumptions before treating the output as final. For professional or academic work, document your input values and any conversion standards used so results can be reproduced. Apply this calculator as part of a broader workflow, especially when the result feeds into a larger model or report.
Most mistakes come from mixed units, rounding too early, or misread labels. Recheck each final value before use. Pay close attention to sign conventions — positive and negative inputs often produce very different results. When working with multiple related calculations, keep intermediate values available so you can trace discrepancies back to their source.
Enter the most precise values available. Use the worked example or presets to confirm the calculator behaves as expected before entering your real data. If a result seems unexpected, compare it against a manual estimate or a known reference case to catch input errors early.
Standard tiers: Mega Cap $200B+, Large Cap $10B–$200B, Mid Cap $2B–$10B, Small Cap $300M–$2B, Micro Cap $50M–$300M, Nano Cap under $50M. Use this as a practical reminder before finalizing the result.
EV includes debt (which an acquirer would assume) and subtracts cash (which they'd receive). It represents the total acquisition cost of the business.
P/E is better for profitable companies. P/S is useful for unprofitable or early-stage companies where earnings are negative but revenue exists.
It depends on the sector and growth rate. S&P 500 average is ~22×. Below 15× may indicate value; above 30× suggests growth expectations.
Standard market cap uses shares outstanding (which includes restricted shares). Free-float market cap excludes closely held shares and is used for index weighting.
No — market cap changes only when the share price moves or when shares outstanding change (stock splits, buybacks, new issuance). Keep this note short and outcome-focused for reuse.