How to Use This Calculator
- Enter your account balance — total trading capital
- Enter your risk percentage — how much % you are willing to lose (1-2% recommended)
- Enter your entry price — price at which you plan to buy
- Enter your stop loss price — price at which you will exit if wrong
- Get exact position size in coins and dollar value
Position Size Formula
Risk Amount = Account Balance × (Risk % / 100)
Position Size = Risk Amount / (Entry Price - Stop Loss)
Risk Amount = Maximum dollar loss you accept
Position Size = Number of coins to buy
Position Value = Position Size × Entry Price
Example Calculation
Account: $10,000. Risk: 2%. Entry: $45,000. Stop Loss: $43,000.
| Parameter | Value |
|---|---|
| Account Balance | $10,000 |
| Risk Per Trade | 2% = $200 |
| Entry Price | $45,000 |
| Stop Loss | $43,000 |
| Stop Distance | $2,000 |
| Position Size | 0.1 BTC |
| Position Value | $4,500 |
| Max Loss | $200 (2% of account) |
Risk Per Trade Guidelines
| Trader Level | Risk Per Trade | Rationale |
|---|---|---|
| Beginner | 0.5 – 1% | Learning phase, protect capital |
| Intermediate | 1 – 2% | Standard professional rule |
| Advanced | 2 – 3% | High conviction setups only |
| Never | 5%+ | Account destruction territory |
Why Position Sizing Saves Accounts
With 2% risk per trade and a 40% win rate — you can still be profitable long term if your winners are bigger than your losers. Without position sizing, 5 losing trades at 20% risk each destroys your account completely.
Frequently Asked Questions
Position sizing determines how much of your account balance to risk on a single trade. Proper position sizing ensures no single loss can devastate your account, allowing you to survive losing streaks and stay in the game long term.
Professional traders risk 1-2% of their account per trade. Beginners should start with 0.5-1%. Never risk more than 5% on any single trade regardless of how confident you feel. Confidence does not eliminate market uncertainty.
Position Size = (Account Balance × Risk %) / (Entry Price - Stop Loss Price). This gives the number of coins to buy so your maximum loss equals your predetermined risk amount if stop loss is hit.
A stop loss is a price level where you exit a trade to limit your loss. It is placed below your entry for long trades. Setting a stop loss before entering is non-negotiable for risk management in volatile crypto markets.
Position sizing protects your account from ruin. Even with a 40% win rate, proper position sizing keeps you profitable long-term. Without it, a few bad trades can wipe your entire account. It is the single most important skill in trading.