Free tools
Free trading calculators for traders who size risk first.
16 free tools — no account required. Use them to size risk, measure edge, and plan levels, then log the idea where stops and outcomes stay visible.
Risk & sizing
Size positions from risk, not vibes.
- Position sizeSize stocks, futures, or crypto from account risk, entry, and stop. Free — no signup.Open calculator →
- Risk / rewardTurn entry, stop, and target into an R-multiple before you post or place the trade.Open calculator →
- ATR sizingSize from average true range so stop distance tracks volatility instead of a fixed dollar stop.Open calculator →
- Kelly criterionEstimate full and half-Kelly stake fractions from win rate and payoff — use as a ceiling, not a mandate.Open calculator →
Edge & performance
Expectancy, drawdowns, and honest math.
- Break-even P&LSee net P&L after commissions and the exit price that truly breaks even.Open calculator →
- Trade P&LQuick long/short P&L from entry, exit, size, and fees — before you log the trade.Open calculator →
- ExpectancyCombine win rate with average win and loss to see if your edge is positive per trade.Open calculator →
- Required win rateFind the break-even win rate for a given reward:risk so you stop guessing.Open calculator →
- DrawdownMeasure peak-to-trough drawdown and the gain required to get back to even.Open calculator →
- R-multipleScore a closed trade in R from entry, stop, and exit so journals stay comparable.Open calculator →
Forex & contracts
Pips, lots, and margin for FX desks.
- Pip valueConvert pip size, contract size, and lots into account-currency pip value.Open calculator →
- Lot sizeDerive lot size from account risk, stop in pips, and pip value per standard lot.Open calculator →
- Margin & leverageSee required margin, buying power, and how much of equity a position uses.Open calculator →
Levels & planning
Structure entries, targets, and scale-ins.
- Compound growthProject account growth with monthly return and optional contributions — fantasy curves included, skepticism recommended.Open calculator →
- Average entryBlend multiple fills into one average price and total size for scale-ins.Open calculator →
- FibonacciMap classic retracement and extension levels from a swing high and low.Open calculator →
From calculator to structured idea
BuyNdSell is a trader feed where every idea needs a thesis, a stop, and what proves you wrong. Losses stay on the record.
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