30 free tools · no account · no paywall
Free trading tools & stock calculators
Paper trading, position sizing, live lookup, compound math — and Trading 212 portfolio charts if you want screenshot-ready allocation and P&L from your own API key.
Start with the stock market simulator, size ideas with the position size calculator, or look something up live. Guides live next door when you want the “why,” not just the math.
All free tools
FeaturedStock Market Simulator
Practice trading with fake money.
Paper trade stocks and ETFs with live market prices, a watchlist, charts, and portfolio stats. Start with virtual cash, practice buy/sell discipline, and export your trade history — no brokerage account required.
T212Trading 212 Portfolio Charts
Connect T212 and flex your P&L.
Paste your Trading 212 API key (keys stay in the browser — we don’t store them) to pull live positions and render allocation + unrealized P&L charts made for screenshots. Demo sample charts load first; swap in your real book when you’re ready.
CryptoCrypto Prices & Charts
Live quotes + historic charts.
Search Bitcoin, Ethereum, Solana or any coin for a live USD price, market cap, ATH context, and historic charts from 24h to max history — CoinGecko data, no signup.
CryptoCrypto Markets
Top coins by market cap.
Scan the top cryptocurrencies by market cap with live-ish USD prices, 24h/7d/30d moves, volume, and 7-day sparklines. Click any name for a full historic chart.
CryptoCrypto Profit Calculator
BTC/ETH trade P&L with fees.
Enter buy price, sell price, coin amount, and exchange fee % to see net profit or loss, return %, and break-even — built for crypto, not share counts.
CryptoCrypto DCA Calculator
Recurring buys vs lump sum.
Model weekly or monthly crypto buys against a lump sum under your assumed return. Chart included — stress-test rates because crypto drawdowns are brutal.
CryptoCrypto Position Size
Risk % to coin amount.
Turn account equity, risk %, entry, and stop into how many coins to buy — with optional leverage so you see margin vs risk. Spot = leverage 1.
CryptoCrypto Converter
Any coin · live prices · fiat or swap.
Search any CoinGecko coin (BTC through PEPE/SHIB/WIF) for live fiat prices, fiat↔crypto or crypto↔crypto conversion, fee %, and smart decimals for micro-priced alts. Sats for Bitcoin.
LiveStock Screener & Movers
Gainers, losers, most active, extended hours.
Scan day gainers, losers, most-active names, and growth presets — plus pre-market and after-hours movers on liquid US stocks. Click any ticker to open Live Stock Lookup.
NewMarket Heatmap
Sector & index ETF heat at a glance.
Color-coded daily % change for SPY, QQQ, IWM and Select Sector SPDRs. Spot which parts of the market are leading or lagging before you dig into single names.
NewEconomic Calendar
CPI, jobs, FOMC and macro dates.
Browse this week’s macro releases plus curated US high-impact look-ahead (FOMC, approximate CPI/NFP). Filter by date and country so you are not blindsided by a print.
NewEarnings Calendar
Who reports this week?
See upcoming US earnings dates with EPS estimates, actuals when available, and BMO/AMC timing when provided. Filter by ticker and open any symbol in Stock Lookup.
NewCompare Stocks
2–4 tickers side by side.
Put peers next to each other for price, P/E, yield, beta, margins, and charts. Fast relative valuation without juggling browser tabs.
NewStock Watchlist
Save tickers with live quotes.
Keep a personal list of up to 30 tickers in your browser with live prices and day change. Jump straight into lookup or the screener — no account, no sync servers.
NewDividend Calendar
Upcoming ex-dividend dates.
See which stocks go ex-div soon, with payment dates and amounts. Filter by ticker so you do not buy “for the dividend” on the wrong day.
Most usedPosition Size Calculator
Risk the right amount on every trade.
Turn account size, risk %, entry, and stop into an exact share count — with 1% rule presets, optional target for R:R, and a live formula walkthrough. Size the loss before you click buy.
Compound Growth Projector
See how your portfolio grows over time.
Project ending balance with contributions, return rate, and time — plus inflation view, $100k–$1M milestones, and what-if levers (save more vs earn more vs stay longer). Chart and year table included.
Dividend & DRIP Calculator
Forecast your dividend income.
Estimate annual dividend income, model dividend growth, and project DRIP reinvestment over time. See how cash payouts vs automatic share buys change long-term income and share count.
Live dataLive Stock Lookup
Real-time quotes, news & earnings.
Look up any ticker for live quotes, charts, and fundamentals like P/E, ROE, margins, debt, beta, and 52-week range — with plain-English explanations so the numbers actually mean something.
Options Profit Calculator
Payoff charts for calls & puts.
Map long or short call/put payoffs with an interactive diagram, expiration price slider, breakeven, max profit/loss, moneyness, and a dense P&L ladder — so risk is visible before you pay or collect premium.
LivePortfolio Tracker
Track holdings with live prices & P&L.
Add tickers, pull live quotes, and watch allocation, day P&L, and total return update in your browser. Share a JSON code or CSV so friends can import the same book — privacy-first, no signup.
Dollar Cost Averaging Calculator
See the power of regular investing.
Compare dollar cost averaging vs lump sum investing under your contribution schedule and return assumptions. Useful for paycheck investing, 401(k) habits, and reducing timing regret.
PopularStock Profit Calculator
Figure out trade P&L in seconds.
Enter buy price, sell price, shares, and fees to see net profit or loss, percent return, and break-even sell price. The quick answer to “how much did I make on this trade?”
Investment Return Calculator
Calculate your actual returns.
Convert starting value, ending value, and time into total return, ROI, and CAGR. Measure real performance so you can compare strategies fairly across different holding periods.
NewRisk Reward Calculator
Check if a trade is worth taking.
Enter entry, stop-loss, and target to get your risk/reward ratio, potential profit vs loss, and whether the setup clears a 2:1 (or better) bar. Pair it with position sizing so every idea has defined upside and downside.
NewAverage Cost Calculator
Find your true cost basis per share.
Add buys at different prices (or model averaging down) and get weighted average cost, total shares, total invested, and unrealized P&L at a mark price. The answer to “what’s my breakeven after that add?”
NewCapital Gains Tax Calculator
Estimate tax on stock profits.
Estimate short-term vs long-term capital gains tax on a stock sale using purchase price, sale price, holding period, and your tax bracket. Plan exits with tax drag in mind — not after the fact.
PopularRetirement & FIRE Calculator
How much do you need to retire?
Project nest-egg size from savings, contributions, and returns — or reverse it: enter desired annual spending and a withdrawal rate to see your FIRE number. The classic “how much do I need?” answer with a clear timeline.
NewInflation Calculator
See what money really buys later.
Convert today’s dollars into future (or past) purchasing power using an inflation rate. Useful for salary goals, retirement planning, and understanding why “cash under the mattress” quietly loses value.
NewStop-Loss Calculator
Pick a stop % or price with clear risk.
Enter entry price and either a stop % or stop price to see dollar risk per share, total risk for your share count, and the stop level that matches a target risk %. Pair with position sizing before you place the order.
Why use free stock trading tools?
Good investing is mostly process: size risk correctly, stay invested long enough for compounding to matter, understand what you own, and practice before you scale up. Swift Penguin’s tools are built for those jobs — calculators and simulators you can open in a browser with no signup, no trial, and no upsell.
How to combine these tools
- Research → practice → size: look up a ticker, paper trade the idea in the simulator, then size the real trade with the position size calculator.
- Income & growth: model dividends and DRIP, then project multi-decade growth with the compound calculator.
- Habits & results: compare DCA vs lump sum, track holdings privately, and measure CAGR so you’re not guessing performance.
- Options: sketch call/put payoffs before you risk premium — then keep position risk tiny until you understand theta and IV.
Free forever, no account required
We don’t ask for an email to “unlock” basic math. Portfolio and simulator data that needs persistence stays in your browser. Use the tools as often as you want, bookmark the ones you reopen weekly, and read the matching guides when a concept still feels fuzzy.