# Market Capitalization Calculator

URL: https://speedycalculator.com/calculators/finance/market-cap/
Last updated: 2026-10-25

> The market capitalization calculator works out a company's market value – share price times shares outstanding – and classifies it as mega, large, mid, small, micro or nano cap.

## Inputs

- Share price
- Shares outstanding

## Results

- Market capitalisation
- Size category

## Formula

```
Market capitalisation = share price × shares outstanding
```

## Explanation

Market cap is the stock market's valuation of a company's equity. Size categories matter because small caps tend to be more volatile and grow faster, while large caps are more stable. Thresholds are conventions, not rules.

### How to use the Market Capitalization Calculator

- **Share price**
- **Shares outstanding**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Enter the share price and the number of shares outstanding.

### Tips

- Take figures from the same financial statements and the same fiscal year.
- Compare ratios with companies in the same industry, not across industries.
- Use several valuation measures together; no single ratio tells the whole story.
- Market prices change every second – refresh the share price before you rely on a result.

### Common mistakes to avoid

- Mixing per-share figures with company totals.
- Using trailing earnings for one company and forward earnings for another.
- Forgetting dilution from options and convertible securities.

### Inputs explained

FieldWhat to enterShare priceAmount in your currencyShares outstandingA number

### Example values

How the main result changes when **Share price** changes and everything else stays at the example values above:

Share priceMarket capitalisation92.5231,250,000,000138.75346,875,000,000185462,500,000,000231.25578,125,000,000277.5693,750,000,000370925,000,000,000

## Worked example

Inputs — Share price: $185; Shares outstanding: 2,500,000,000.

Results — **Market capitalisation = $462,500,000,000.00**; Size category = Mega cap (> $200B).

## FAQ

**How is market cap calculated?**
Share price × number of shares outstanding.

**What is a large-cap stock?**
Usually a company worth more than $10 billion.

**Is market cap the same as company value?**
No – enterprise value also includes debt and cash.

**What formula does the Market Capitalization Calculator use?**
Market capitalisation = share price × shares outstanding.


## Sources

- [U.S. SEC – Investor.gov compound interest and investing basics](https://www.investor.gov/)