Tools & calculators
8 calculators for traders and investors. All client-side — no account, no cookies, no data sent to our servers. Use them while planning a strategy or reading a tutorial.
Risk pertrade
Compute how large your position can be to stay within your risk limit. The core tool of every risk-management method (Dalio, Livermore, PTJ).
Positionsize
Same math as Risk-per-Trade, different UI. Enter account, risk-%, entry and stop — get position size in units and value.
Compoundinterest
See how time and reinvestment combine. Adjust contribution, return and term — compute end value and total contributed.
Dollar-costaveraging
Simulate monthly investing over many years. Essential for ETF and crypto DCA strategies.
Break-even
Compute the minimum price move needed to cover costs (fees, spread) before you profit.
Risk/reward
Enter entry, stop and target — see the R:R ratio instantly. Helps you judge whether a trade is worth it.
Kellycriterion
Mathematically optimal position size from your win-rate and avg win/loss. For experienced traders — apply conservatively and fractionally.
Drawdownrecovery
Lose 20% and you need +25% to break even. See the merciless asymmetry of loss vs recovery.
All tools run entirely in the browser; they even work offline once the page is loaded. No analytics, no cookies, no input leaves your device. Last checked 20-04-2026.