The retail trading world is full of "calculators" that are really lead-magnets — they ask for your email before they show you the answer. These aren't those. Type the numbers in, get the result instantly. Bookmark the page, share it, embed the math wherever it's useful.
Account size, risk %, entry, stop — exact share count and dollars at risk. The single most important sizing math in retail trading.
Entry, stop, target — instant R:R plus the minimum win rate you need to be profitable. The math that breaks every "high win rate" sales pitch.
Three methods (percent, ATR, fixed dollar), one screen. Pick the one that fits your strategy or take the widest of the three.
Win rate, average win, average loss. Returns expectancy per trade plus projected returns over 100, 500, and 1000 trades.
95% confidence interval on your true win rate. Stops you from over-trusting your last 12 trades — the most expensive statistical mistake retail traders make.
What a 3% monthly return actually compounds to over 10 years. Useful for realistic goal-setting — and a reality check on signal services promising the impossible.
Position sizing, expectancy, and stop-loss placement are the three pieces of math every trader uses, and very few get right. Win-rate confidence is the one piece of statistics that protects you from believing a small sample represents your real edge. Compound interest is the lens that makes you ask whether your strategy is realistic at all.
All six calculators run entirely in your browser. Nothing is sent anywhere. The page works offline once loaded. The source is plain HTML and JavaScript — view source and copy if you want to embed in your own site.