Market Cap Calculator

Type a share price and a number of shares and the page works out the market capitalisation — the price of one share multiplied by the share count. Fill in the optional target and it turns the same multiplication around: the share price the company would need for that market capitalisation, on the share count you typed. Every line of the arithmetic is printed below with your own figures. Nothing is looked up — this page has no quote feed and no share-count data, so both numbers come from you.

The price and the share count

Share price — the price of one share The price you have in front of you for a single share. This page has no quote feed, so it cannot fill this in and it never fetches a price on its own.

Number of shares — the count you want to value A listed company has more than one share count, and they are not the same number: the total shares outstanding covers the whole company, the free float covers only the shares that actually trade. Type whichever one you have in front of you — the page values that count and nothing else, and says so in the result.

The reverse — optional

Target market capitalisation — optional Fill this in and the page divides it by the same share count: that gives the price per share the company would need for the market capitalisation you asked for. Leave it empty and the page stops at the market capitalisation itself.

Market capitalisation — price × shares —

The same amount — short form —

How the market cap is worked out

Two numbers come from you and everything else is derived from them. Market capitalisation is one multiplication — the price of a single share against the number of shares — and the reverse direction is the same multiplication read backwards, which is a division.

Market capitalisation = share price × number of shares
Share price needed = target market capitalisation ÷ number of shares
The multiple = share price needed ÷ the share price you typed

Market cap = share price × number of shares · Price needed = target market cap ÷ number of shares

Worked example: a share price of 175.2500 and 15,600,000,000.0000 shares. The market capitalisation is 175.2500 × 15,600,000,000.0000 = 2,733,900,000,000.00, which reads as 2.73 trillion. Nothing else goes into that number — no debt, no cash, no revenue, no future anything.

Worked example of the reverse: the same 15,600,000,000.0000 shares, with a target of 3,000,000,000,000.00. The price that target works out to is 3,000,000,000,000.00 ÷ 15,600,000,000.0000 = 192.3076 per share. Against the 175.2500 you typed, that is 192.3076 ÷ 175.2500 = 1.0973×. Both figures are arithmetic on your own numbers: they state what the multiplication gives for that target and nothing more.

Rounding: every figure on this page is rounded down, never up — the same rule as the rest of the site. Share prices and share counts are shown to four decimals, amounts to two, so the number you read is never larger than the one that was computed. Each line of the arithmetic is printed under the results using the figures shown above it, so you can check the whole chain by hand.

The two share counts: total shares outstanding and the free float

This is the part most market cap calculators skip. "How many shares does the company have" has more than one honest answer, and they give different market capitalisations from the same share price.

Total shares outstanding — every share the company has issued. Multiply the share price by this and you get the market capitalisation of the whole company.
Free float — only the shares that are actually available to trade: what is left after founders, insiders, governments and locked-up holders are taken out. Multiply the share price by this and you get the float market capitalisation, which is always the smaller of the two.

Both numbers come from filings and neither is on this page. That is why the box above asks you to type a count rather than offering a figure: the page cannot know which one you have in front of you, so it values the one you enter, prints it back in the result, and leaves the other one alone. If you want the other figure, type it in and the page works it out as a second run.

The position size calculator takes the other end of a trade — an account, a risk percentage, an entry price and a stop — and works out how many shares fit inside that risk. The stock profit calculator carries a position through a sale and puts the fees on both sides.

Why there is no size label on this page

Lots of pages will tell you a company is "large cap" or "mid cap" from its market capitalisation. This page will not, and the reason is not that the labels are secret — it is that there is no single official line to draw.

There is no standard-setting body that publishes a set of market cap thresholds. Different data providers, index families and brokers each publish their own bands, and the bands do not agree with each other.
Because the lines differ, the same market capitalisation can be "mid cap" at one provider and "large cap" at another. A label is a provider's convention, not a property of the number.
The bands also move: several providers shift them over the years as the whole market grows, so a company can change label without anything about the company changing.

So the page gives you the market capitalisation itself and stops there. Inventing one set of thresholds and presenting it as the rule would be a guess dressed up as a fact, and you would have no way to tell which convention it came from.

What is counted, and what is not

This page uses only the two numbers you type, plus the target if you fill it in. Nothing else goes into the arithmetic.

There is no live quote on this page. The share price is typed by you. This page never fetches a price, has no connection to a market data source and cannot show you a quote that is not real — if you want the current price of a stock, this is not the place to find it.
There is no share-count data either. This page will not look up how many shares a company has issued, and it will not guess between the total and the float. Whatever you type is what it uses.
Market cap is not the value of the business. It is the share price times a share count, so it reflects what the market is pricing the equity at. It does not know about debt, cash, pension obligations or anything else on the balance sheet, and two companies with the same market capitalisation can be very different businesses.
One company per run, one share count per run. The page values a single price against a single share count. It cannot line up several companies side by side, cannot import a holdings file and cannot add a list of positions together.
One currency. The figures have no currency attached. If a price is in one currency and a market capitalisation you type is in another, the division mixes them — convert first, because this page will not.
No advice. Nothing here says whether a market capitalisation is big or small, good or bad, cheap or expensive. It multiplies two numbers and divides them the other way.
Not counted: commissions, fees, taxes, spreads, slippage, dividends, splits, buybacks, share issuance and any change over time. There is no field for any of them and no clock on this page: it is a snapshot of the two numbers you typed.
Not built: saving your input, a history of previous runs, accounts or signing in. Nothing is stored, and your numbers are not sent anywhere.

The result describes the arithmetic on the numbers you supplied. It is not a valuation and not a view on any company.

Frequently asked questions

What does a market cap calculator work out?

Market capitalisation: the price of one share multiplied by the number of shares. Type a price and a share count above and the page gives the market capitalisation, reads that amount in a shorter form, and — if you fill in the optional target — the share price the company would need for a market capitalisation you name, on the same share count.

Is a market capitalization calculator the same as a market cap calculator?

Yes. Both names mean this tool, and so do "market cap formula" and "calculate market cap". The wording changes nothing about the arithmetic: price times shares one way, target divided by shares the other.

How do I calculate market cap?

One multiplication. Take the price of a single share, multiply it by the number of shares, and the result is the market capitalisation. The only thing that makes it feel complicated is picking the share count — that is the section below, and the difference between the total shares outstanding and the free float.

Which share count should I type?

The one you have in front of you, and you should know which it is, because the two give different answers. The total shares outstanding — the count on the balance sheet or the cover of a filing — gives the market capitalisation of the whole company. The free float gives the float market capitalisation, which is smaller. This page has no share-count data, so it uses exactly what you type and prints that count back in the result.

Can I go the other way — work out the price for a given market cap?

Yes, that is the optional box. Divide the target market capitalisation by the share count and you have the price per share that target works out to. The page also shows it as a multiple of the price you typed, so you can see how far apart the two numbers are. It is the same multiplication rearranged, nothing more.

Why does the page not say whether the company is small, mid or large cap?

Because no single official set of thresholds exists. Different data providers publish different bands, they do not agree with one another, and they shift them over time — so the same market capitalisation can carry different labels at different places. Rather than invent a set of lines and present them as the rule, the page gives the market capitalisation and leaves the labelling to whoever publishes the convention you follow.

Does it fetch the share price or the share count for me?

No, and it will not pretend to. There is no quote feed and no share-count data behind this page, so both boxes are yours to fill. If a site offers to fill them in for you, what you are getting is that site's data, on that site's terms, for that site's moment in time — which is a different thing from the arithmetic here.

Is market cap the same as the value of the company?

No. Market capitalisation is what the equity is priced at: share price times shares. It says nothing about debt, cash or other obligations, so it is not the value of the business as a whole, and companies with the same market capitalisation are not the same size of business. That gap is exactly what measures like enterprise value exist to cover, and this page does not pretend to do that job.

Does the page work for crypto or anything else with a price and a supply?

The multiplication is the same for any asset: price times a supply. Where this page stops is the data — it has no supply figures and no prices, so you would type both. The box is labelled for shares because this is a stock calculator; if you type a coin supply into it, the arithmetic is still price times count, and the share-count note in the result still applies.

Why does the number look so long?

Because market capitalisation of a listed company runs into the billions and trillions, and the page prints the money figure with two decimals as it does everywhere else. The short-form box next to it reads the same amount in a shorter way — billions, trillions — rounded down like every other figure here.

Does it work on my phone, and do I need an account?

Yes to the first, and no to the second. The fields stack to a single column on a narrow screen and the results stay inside the width of the page. There is no sign-up, no pop-up and nothing to install: the whole calculation runs in your browser.

This page is a calculator, not investment advice — it is arithmetic, not a recommendation to buy or to sell anything. Market capitalisation is a share price times a share count and says nothing about whether a valuation is reasonable. Taxes, commissions, fees, spreads and slippage are not counted anywhere on this page. There is no live quote and no share-count data here: both numbers are typed by you. Contact: [email protected]