Stock market tools & calculators

63+ free tools, grouped by the question you actually have — not by what we called the code. Filing-backed analyzers and pure-math calculators; no login, no daily caps, and every tool hands off to the next.

Try these:DCF Position size Dilution Options profit Congress trades

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63 tools · search or filter by category

Free forever. Every tool hands off to the next — your analysis follows you.

Monte Carlo SimulatorRun thousands of randomized market paths from your own return and volatility assumptions to see the realistic range of outcomes — not one misleading "average" projection.portfolio

Retirement Withdrawal CalculatorTest any withdrawal rate against thousands of simulated retirements, or solve for the highest rate that still clears your target success bar — the real "will my money last" question, done honestly.portfolio

Financial Goal CalculatorWork out how much to save each month to hit a savings goal at your chosen confidence level — or test whether what you're already saving is actually enough, run against thousands of simulated market paths.portfolio

Risk Tolerance QuizAnswer five quick questions about your time horizon, reaction to a drop, and goals to find a typical stock/bond/cash allocation range for your investor profile.risk

Stock Correlation MatrixSee how closely a set of stocks actually move together. Enter up to eight tickers for a correlation heatmap and a diversification score — because "is NVDA just AMD?" has a real answer.portfolio

CORE TOOLPosition Size CalculatorTurns capital, risk %, entry, and stop into an exact whole-share position size with dollar risk and R-multiple targets.risk

CORE TOOLOptions Profit CalculatorCalculate max profit, max loss, breakeven, and payoff at expiry for common option trades.options

CORE TOOLDCF CalculatorEstimate intrinsic value per share using discounted future free cash flow.valuation

Kelly Criterion CalculatorEstimate full and fractional Kelly bet size from win rate and payoff ratio.risk

Max Loss CalculatorSet your account-level line in the sand — the loss at which you stop trading — and share it with a friend to hold yourself accountable.psychology

Risk of Ruin CalculatorProbability your account ever hits a ruin-level drawdown, from win rate, payoff ratio, and risk % per trade.risk

Risk/Reward Ratio CalculatorTurn entry, stop, and target into your R:R ratio, risk/reward per share, and the win rate needed to break even.risk

Stock Profit CalculatorComputes gross/net profit, percent return, and annualized return on a completed or hypothetical stock trade.portfolio

Average Cost CalculatorCombine up to 5 existing lots with a new buy to get your new average cost, total shares, total invested, and break-even.portfolio

Compound Interest CalculatorProject how a starting balance plus monthly contributions compounds into a future value, year by year.portfolio

DRIP CalculatorProject dividend reinvestment: end shares, end value, and annual income — reinvested vs. not, side by side.dividends

CAGR CalculatorTurn a beginning value, ending value, and time span into an annualized growth rate, total return %, and growth multiple.valuation

Percentage Gain CalculatorTurn two prices into % gain/loss and dollar change — plus the exact gain needed to recover a loss.portfolio

Stock Break-Even CalculatorFinds the exact sell price where a stock trade breaks even after buy/sell fees, plus the % move needed to get there.risk

Covered Call & Cash-Secured Put CalculatorPremium-seller returns: if-flat and if-called yields, annualized, breakeven, collateral, and effective buy price.options

Stock Split CalculatorSee your share count and price after any N-for-M split — forward or reverse — and why position value doesn't change.fundamentals

Capital Gains Tax CalculatorEstimate US federal capital gains tax on a stock sale — short vs long term, 0/15/20% brackets, NIIT, and effective ratetax

WACC CalculatorBlend equity and debt costs into one weighted average cost of capital — the discount rate a DCF wants.valuation

Graham Number CalculatorA fair-value ceiling from earnings and book value — √(22.5 × EPS × BVPS), Benjamin Graham style.valuation

Sharpe Ratio CalculatorGrade return per unit of risk — Sharpe from return, risk-free rate, and volatility, plus Sortino when you have downside deviation.risk

P&L Card GeneratorTurn any trading day's gain or loss into a clean, shareable card image — styled for X, Discord, or a screenshot.utility

Fake Tweet GeneratorMock up a realistic X (Twitter) post image — for memes, mockups, and reaction screenshots.utility

Crypto DCA CalculatorDollar-cost-average a coin: see total invested, units accumulated, average cost, and value at any target price.portfolio

Crypto Profit CalculatorEnter buy price, sell price, and amount — get your exact profit, return %, and the bite fees take.portfolio

Portfolio BriefUpload a CSV of your holdings and see your real sector mix vs the S&P, concentration, and what is happening across your positions — parsed in your browser, nothing stored.valuation

Small-Cap DashboardOne ticker → dilution, float, halts, RVOL, levels, news in one view.small-cap forensics

Dilution ProfileThe whole dilution picture on one screen: O/S history, warrants, convertibles, runway, offerings — five ratings, formulas shown.small-cap forensics

S-3 Shelf CheckerIs an active shelf letting them dilute at any time?small-cap forensics

Offering CheckerWhen did they last announce — or execute — an offering?small-cap forensics

Float CheckerShares actually tradable — the fuel behind small-cap moves.small-cap forensics

Do They Need Money?Cash runway from the latest filings — the motive for a raise.small-cap forensics

Red Flags + Health ScoreAccounting and liquidity warning signs, scored from filings.small-cap forensics

Short Squeeze Research HubEvery short surface in one place, incl. the full Reg SHO threshold list.small-cap forensics

Short Interest by TickerShares short, days to cover, % of shares outstanding — dated.small-cap forensics

Short Squeeze ScreenerDays to cover, builds & unwinds — FINRA biweekly data.small-cap forensics

Relative Volume (RVOL)Unusually active vs its own normal? Spot what's in play.small-cap forensics

Trading Halt MonitorLive Nasdaq/NYSE/Cboe halts, market-wide.small-cap forensics

Support & ResistanceUp to 25 resistance areas above the price from a stock's own swing highs, plus pivots.small-cap forensics

SMA 200 FinderThe 200-day line big money watches — above or below, by how much.small-cap forensics

Large-Cap DashboardQuality / Value / Momentum / Smart-Money over the whole long-term case — from filings + end-of-day prices.valuation

Custom Research ReportTick the modules you want for one ticker — one shareable, printable page.valuation

Compare StocksTwo tickers side by side on the fundamentals.valuation

Where Is It Incorporated?State or country of incorporation vs head office, from its own annual report.valuation

Investment Time MachineWhat a sum invested since July 2024 is worth now, next to SPY over the same dates. Price return.valuation

Plain-English ScreenerDescribe the stocks you want; we filter on the facts.valuation

Max PainWhere open interest pins the tape — strike walls, expected move, daily snapshots and an accuracy ledger that grades itself.options

Insider Trading TrackerEvery Form 4 buy and sell, filed by the officers and directors themselves.ownership

Congress Trading TrackerWho in Congress traded what, from STOCK Act disclosures.ownership

13F Whale TrackerWhich funds added or trimmed — quarterly 13F holdings.ownership

Guru PortfoliosThe famous investors' disclosed books, position by position.ownership

Earnings CalendarWho reports, when — filing-confirmed, ranked by size and typical move.events

Offering CalendarEvery offering priced in the past month, market-wide, day by day.events

IPO TrackerWho's going public, and how the recent ones actually traded.events

Why Is It Moving?The likely catalyst behind a stock's move today.events

Stock NewsLatest headlines + SEC filings for any ticker.events

Dividend TrackerFiling-derived history, yield, growth, labeled projections.long-term

Trading Journal + P&L CalendarLog trades or just the day's +/- P&L — green days, rose days, R-multiples, streaks. In your browser, no account.journal

Risk PlaybookYour written rules, kept where you'll re-read them.journal

Don’t want to pick tools? Build one report.6 presets

Enter a ticker, tick the modules you want — float, short interest, dilution, runway, offerings, halts, headlines and more — and get them on one shareable page. Or start from a preset:

Build a custom report →Standard report Dilution audit Squeeze check Day-trade prep The value case Event prep

No login, no caps
Filing-backed modules
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What are you trying to do?

Start here. Each path opens the tools that answer it.

8 paths

Check a small cap for trapsDilution, float, halts and the paper trail, straight from EDGAR.14 tools Work out what it is worthFiling-backed valuation with the formulas shown, not hidden.12 tools Size the positionRisk per trade, stops and R-multiples before conviction.8 tools Read the options chainOpen-interest structure and premium math, delayed and labelled.3 tools See who is buyingInsiders, Congress and funds, from the disclosures they must file.4 tools Find the next eventFiling-confirmed dates, and what moved when it happened before.5 tools Plan for the long runDividends, drawdowns and decades, with projections labelled.13 tools Review my own tradingThe journal and its P&L calendar. Local-first, no signup.4 tools

Recommended tools

Good places to start.

all 63 tools →

CORE TOOLSmall-Cap DashboardOne ticker → dilution, float, halts, RVOL, levels, news in one view.CORE TOOLLarge-Cap DashboardQuality / Value / Momentum / Smart-Money over the whole long-term case — from filings + end-of-day prices.CORE TOOLPosition Size CalculatorCapital, risk %, entry and stop into an exact whole-share position size — with R-multiples.CORE TOOLMax PainWhere open interest pins the tape — strike walls, expected move, daily snapshots and an accuracy ledger that grades itself.CORE TOOLEarnings CalendarWho reports, when — filing-confirmed, ranked by size and typical move.CORE TOOLMonte Carlo SimulatorThousands of randomized market paths — sequence risk, not one misleading average.

Browse by category

Every tool, organised by what it does.

9 categories

Valuation calculators11 tools Portfolio & returns10 tools Risk & position sizing7 tools Options calculators3 tools Sharing & utilities2 tools Psychology1 tools Dividends1 tools Fundamentals1 tools Tax1 tools

built to be read — by people and by machines

Every tool page here is server-rendered: the numbers live in the HTML, not in a JavaScript bundle that only runs for a logged-in browser. Paste any StockTools URL into ChatGPT, Claude, Perplexity or a crawler and it receives the same figures you see, with the source filing links attached — and llms.txt tells an assistant where everything lives. It costs nothing to check: fetch one of our ticker pages and the same page on a paid research tool, and compare what comes back.

Every calculator, by category

the A–Z index · 30 calculators

Portfolio & returns10

Monte Carlo Simulator Retirement Withdrawal Financial Goal Stock Correlation Matrix Stock Profit Average Cost Compound Interest Percentage Gain Crypto DCA Crypto Profit

portfolio guides

Risk & position sizing7

Risk Tolerance Quiz Position Size Kelly Criterion Risk of Ruin Risk/Reward Ratio Stock Break-Even Sharpe Ratio

the risk playbook

Valuation calculators5

DCF CAGR WACC Graham Number Portfolio Brief

valuation terms, defined · valuation guides

Options calculators2

Options Profit Covered Call & Cash-Secured Put

options, explained · max pain & open interest · max pain, defined

Sharing & utilities2

P&L Card Generator Fake Tweet Generator

Psychology1

Dividends1

Fundamentals1

Tax1