Trading Calculators
26 toolsPosition sizing, risk, options and trade-analytics tools.
Risk & Exits
Risk : RewardCalculate the risk:reward ratio of any stock, forex or crypto trade from your entry, stop-loss and target prices. See the “1 : X” ratio, total risk and reward for your position size, the breakeven win rate you must clear, and your expected P&L per trade — for a long or short.Risk of RuinCalculate your risk of ruin — the chance of hitting a drawdown threshold — from win rate, average win/loss and risk per trade, using the classic formula.Drawdown RecoveryCalculate the gain needed to recover from a portfolio drawdown and how long recovery takes at a given return rate.Stop-LossCalculate your stop-loss price by percentage, fixed dollar, or ATR method — plus risk per share and total position risk for long or short trades.Liquidation PriceEstimate the forced-liquidation mark price for an isolated-margin USDT-margined futures position given entry price, leverage, side and maintenance margin rate.Slippage & CommissionCalculate real execution costs — slippage, broker commission (%, per-share or flat), round-trip total and the break-even move required to cover all trading costs.Trailing StopFind the trailing stop price for a long or short position from your water mark and a percentage or fixed trail, plus the distance to trigger.MarginWork out the required margin for a leveraged forex, stock or crypto position from its size and leverage, plus free margin and margin level.Brokerage CalculatorCalculate the exact brokerage, STT, exchange charges, SEBI fee, stamp duty, GST and net profit/loss on an Indian equity delivery or intraday trade.
Options
Options P&LCalculate call and put option profit at expiry for long or short positions. Enter the strike, premium, lot size and underlying price at expiry to get your total P&L, break-even price, maximum profit and loss, return on premium and an interactive payoff diagram. Single-leg, intrinsic value at expiry — works for US and NSE India options.Prob of ProfitEstimate the risk-neutral probability that an options trade finishes on the profitable side of its breakeven at expiration using the Black-Scholes lognormal model.Black-ScholesPrice European call and put options with the Black-Scholes-Merton model and get the full Greeks — Delta, Gamma, Vega, Theta and Rho — from six inputs.Options GreeksBlack-Scholes option price and all five Greeks — Delta, Gamma, Vega, Theta, Rho — for European calls and puts, with dividend yield for equity and index options.
Position Sizing
Position SizeWork out exactly how many shares to buy or short on a trade so a stopped-out loss stays within 1–2% of your account. Enter account size, risk %, entry and stop-loss to get the share count, max loss, capital required and dollar risk — for a long or short, in any currency.Fixed FractionalFixed-fractional position sizing: risk a constant fraction of equity per trade. Enter account, f %, entry and stop to get share count, max loss and capital required.Volatility SizeSize any trade by volatility: enter account size, risk %, ATR and ATR multiple to get the exact share count, max loss, risk per share and capital required.Kelly CriterionCalculate your optimal Kelly bet size — the mathematically proven fraction of your bankroll to risk per trade, based on win rate, average win/loss, and account size.PyramidingCalculate your blended average entry, total capital, total risk and constant-risk stop when scaling into a winning position across multiple tranches.Portfolio HeatCalculate total portfolio heat — the percentage of account equity at risk if every open position hits its stop simultaneously. Based on Elder's 6% rule.
Entries & Averaging
Avg PriceCalculate your quantity-weighted average price per share across multiple buy lots. Add each purchase (price and quantity) to get your blended cost basis, total investment, fee-free break-even and unrealized P&L — the right way to model averaging down a stock, ETF or fund position.Multi-Leg EntryBlended quantity-weighted entry across options legs, futures rolls and staged tranches. Enter each leg's price and quantity for your average entry and P&L.Scale In/OutBlend buy lots into one average entry, then model a partial exit: realized P&L, remaining shares, remaining cost basis and unrealized P&L on what you still hold.
Performance & Edge
ExpectancyCalculate trading expectancy from win rate and average win/loss — the expected profit per trade in currency and R-multiples, over any number of trades.Profit FactorCalculate profit factor — gross profit divided by gross loss — from your win rate and average win and loss, to see how many dollars you make per dollar lost.SQNCalculate Van Tharp's System Quality Number (SQN) from win rate, average win/loss and trade count to score how strong and reliable your trading system is.Trading EdgeMeasure your trading edge — expected profit per unit risked (edge in R) — from win rate and average win/loss, with your breakeven win rate and Kelly stake.