Trading Simulators &
Investment Calculators
Free Monte Carlo position-sizing simulators and practical trading calculators.
Monte Carlo trading simulators.
Fixed Risk Monte Carlo
Compare fixed cash risk, fractional risk and turnover cycles.
Open Fixed Risk Simulator ↗Kelly Monte Carlo
Test fractional Kelly sizing, risk caps and trade outcomes.
Open Kelly Simulator ↗Plan an investment.
Refine the numbers behind the simulation.
Position Size Calculator
Calculate a trade size from the amount you are prepared to lose.
How to use it
- Choose your account currency and enter your balance.
- Type or select a symbol, then enter entry, stop and target prices.
- Confirm the preset contract size against your broker before using the suggested lot size.
Why it matters
Position sizing converts a price-based stop into a consistent cash risk. It helps prevent a volatile instrument or a wider stop from quietly risking more of your account than intended.
Trading calculators & tools.
The math stays visible.
Risk tools are only useful when you can understand their inputs. RiskKit shows the formula, keeps assumptions editable and avoids pretending that an estimate is a promise.
Every result names the simplified model behind it, so you know what the number leaves out.
Point values are editable because contract sizes, lot steps and symbol specifications vary by broker.
This version calculates in your browser. It does not ask for a broker login or store your trading data.