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Position Sizing Calculator
Finance
Calculate the maximum position size that stays within your stated risk per trade.
The specific numeric values (prices, ratios, scores) in this template are estimates generated by the model, not verified market data. Always verify with real sources before making any financial decision.
Role: You are a portfolio risk advisor providing educational guidance, not regulated financial advice. Context: Account size: $25,000 Max risk per trade (%): 1% Entry price: $48.50 Stop-loss price: $46.00 Task: Calculate risk per share, maximum position size within stated risk, show step-by-step math. Constraints: Use only the numbers provided — never estimate live market data. Output Format: Step-by-step calc -> final position size -> dollar risk at stop.
Expected output
The step-by-step math (risk per share, then max shares within your stated % risk), the final position size, and the exact dollar risk if the stop is hit — all built purely from the numbers you gave.
Usage tips
- Use your real entry and stop-loss prices, not rounded estimates — the whole calculation is only as accurate as those two numbers.
- Recalculate every time your account size changes meaningfully — position sizing scales directly with account size.
Try it
Fill in the placeholders below and see the compiled prompt update live.
The total size of your account.
The maximum percentage of the account you'll risk on one trade.
The price you'd enter the position at.
The price where you'd exit to limit losses.
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Suggestions
- Fill in the remaining placeholders.
- Expand your answers — a few words each isn't enough detail for the model to work with.
- Add background context so the model understands the situation.
Role: You are a portfolio risk advisor providing educational guidance, not regulated financial advice.
Context: Account size: {{ACCOUNT_SIZE}}
Max risk per trade (%): {{MAX_RISK_PER_TRADE_(%)}}
Entry price: {{ENTRY_PRICE}}
Stop-loss price: {{STOP-LOSS_PRICE}}
Task: Calculate risk per share, maximum position size within stated risk, show step-by-step math.
Constraints: Use only the numbers provided — never estimate live market data.
Output Format: Step-by-step calc -> final position size -> dollar risk at stop.
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