Position
Position Size
Convert account risk and stop-loss distance into a precise, executable position size.
Use this calculator to turn raw price levels into clear decisions. It is built for speed, mobile use, and quick iteration while you plan or review a trade.
Risk budget
100
Position size (quote)
2,100
Required margin
210
Quantity
0.05
based on stop distance
Tool Guide
Practical explanation, workflow, and pitfalls for this calculator.
Most traders fail from sizing errors, not entry errors.
What this calculator does
- Uses account size and risk-per-trade as the risk budget.
- Uses entry and stop to derive risk per unit.
- Returns maximum position size that keeps stop-loss within your budget.
Why position sizing matters
- Standardizes risk across trades.
- Makes performance comparable and more stable.
- Protects the account during losing streaks.
How to use it
- Choose risk limit per trade (many use 0.5% to 2%).
- Place stop at true invalidation.
- Read calculated size and execute with discipline.
- If size is too small, improve setup quality instead of raising risk.
Example
- Account: 10,000 USD
- Risk: 1% = 100 USD
- Entry: 50.00
- Stop: 49.00
- Risk per unit: 1.00
- Position size: 100 units
Practical tips
- Use same risk rules across assets.
- Combine with Risk/Reward for payoff quality.
- For leverage, also verify with Margin & Leverage and Liquidation Price.
FAQ
Common questions about this tool, from basics to usage.
What is a typical risk per trade?Answer
Many traders use around 1% as a baseline, then adjust by market conditions and strategy.
Does leverage change the correct size?Answer
Leverage changes margin usage. Position size should still be derived from risk budget and stop distance.
Why can a profitable strategy still fail?Answer
Because inconsistent sizing creates unstable drawdowns and decision pressure.
Why this calculator matters
Practical benefits for real trading workflows.
- Translate your plan into concrete numbers before entering a trade.
- Keep risk consistent across different assets and timeframes.
- Evaluate performance quickly after exits or partial fills.
Combine this tool with Position Size and ROI to build a complete pre- and post-trade checklist.
Related Tools
Keep exploring the suite.
Risk / Reward Ratio
Compare potential reward versus risk, including net risk/reward and break-even win rate.
Margin & Leverage
Estimate notional exposure, required margin, and leverage impact before entering a trade.
Liquidation Price
Estimate liquidation levels and distance-to-liquidation from leverage and maintenance margin assumptions.
Disclaimer
Educational use only. Always verify independently.
This calculator is provided for educational purposes only. Outputs are illustrative estimates based on the inputs you provide and do not account for all real-world factors (including, but not limited to, fees, spreads, slippage, funding, taxes, and execution). Do not rely on these results as financial advice. Always verify calculations independently and consult a qualified professional as needed.