Stock Price Tracker

The Stock Price Tracker is a free online tool that track stock portfolio with manual price entries, calculate gains/losses, view allocation pie chart. localstorage persistence.. It runs entirely in your browser with no installation or sign-up needed.

No — you enter prices manually. No API keys or brokerage connection needed.

Browser localStorage. Export as CSV to back up or transfer between devices.

Yes — completely client-side, no registration.

Yes, the Stock Price Tracker is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the Stock Price Tracker in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

The Stock Price Tracker uses industry-standard formulas and algorithms to ensure accurate results. However, for critical financial or medical decisions, always consult a qualified professional.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The Stock Price Tracker works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

Cost basis is the total amount you originally invested in a position: your number of shares multiplied by the price you paid per share. Current value is what that same position is worth right now: your shares multiplied by the current price. The gap between them is your unrealized gain or loss. For example, 50 shares bought at $142 have a cost basis of $7,100; if the price is now $185.50, the current value is $9,275, an unrealized gain of $2,175. Cost basis stays fixed until you buy or sell more, while current value moves with the market every time you update prices. This tracker calculates both for every holding automatically, plus the dollar and percentage gain, so you never have to do the multiplication by hand. Enter your shares and prices to see both figures side by side.

Percentage gain or loss measures how much a position has grown or shrunk relative to what you paid, which makes holdings of different sizes comparable. The formula is simple: subtract your cost basis from the current value to get the dollar gain or loss, then divide that by the cost basis and multiply by 100. For example, a $2,175 gain on a $7,100 cost basis is 2,175 / 7,100 = 0.306, or a 30.6% return. A negative result means the position is down. Percentage return is more useful than a raw dollar figure when comparing a small holding against a large one, because $500 on a $1,000 position is a far better result than $500 on a $50,000 position. This tracker computes the percentage for every line and your whole portfolio, so just enter each holding and read the number directly.

The allocation pie chart shows what percentage of your total portfolio value sits in each stock, turning a list of holdings into an instant risk picture. Concentration is the key thing it reveals: if one ticker fills 60% of the pie, you can see at a glance that your results depend heavily on that single company, while a more even spread of slices signals a diversified mix. Allocation is based on current value, not what you paid, so a position that has run up will take a larger share over time even if you never add to it. Watching that drift helps you decide whether to rebalance. The chart updates the moment you add, edit, or reprice a holding, and a companion panel highlights your top five gainers and losers by percentage. Add your holdings to see your allocation visualized in seconds.

A manual tracker is worth using when you want a private, neutral record that is not tied to one provider. Because you type in prices yourself, nothing connects to your brokerage login, no credentials are shared, and the tool never nudges you toward placing trades. That makes it ideal for tallying positions held across several brokers in one place, modeling a portfolio before you actually buy anything, or paper-trading a strategy. It is also a clean way to learn how cost basis and unrealized gains work without distraction. Updating prices takes a minute: paste current quotes from any free source whenever you want a fresh reading. The trade-off is that figures are only as current as your last update, so this suits periodic check-ins rather than live monitoring. Add a holding or load the sample portfolio to see how the approach feels.

Your holdings are saved in your browser's localStorage, which keeps them on the device where you entered them but does not sync across machines. To carry a portfolio to another computer or phone, or simply to keep a safe copy, use Export CSV: it downloads your full portfolio, including ticker, shares, buy price, current price, date, cost basis, value, and gain/loss columns, as a spreadsheet-ready file. On the other device, open the tracker and use Import CSV to load that file back in; any CSV with the same columns works, so you can even build one in a spreadsheet. Because storage is local, clearing your browser data will erase the portfolio, which is why an occasional export is smart. There is also a Copy Summary button for a quick plain-text recap. Export your portfolio now to keep a backup you control.