In March 2021, a trader named Daniel put $8,000 — 40% of his entire $20,000 account — into a single leveraged Ethereum long. He had a clear thesis. He had done his research. Ethereum was up 300% in three months and every signal he followed was green. Two days later, a flash crash wiped 18% off the ETH price. His position was liquidated. He lost $8,000 in 48 hours.
Daniel did not have a strategy problem. He had a position size problem. His thesis was right — Ethereum went on to reach $4,800 that same year. The problem was that he sized his position in a way that could not survive the normal volatility of the asset he was trading.
This guide explains exactly how to calculate the correct position size for any crypto trade using the 1% risk rule — the same framework used by professional traders to survive long enough to be right. Use the free crypto position size calculator above to get your number for any trade instantly.
What Is the 1% Rule and How Do You Calculate Position Size?
The 1% rule states that you should never risk more than 1% of your total trading account on a single trade. Risk is defined not as the amount you invest, but as the maximum amount you are willing to lose if the trade goes against you — measured from your entry price to your stop-loss price.
Position Size = (Account Size × Risk%) ÷ (Entry Price − Stop-Loss Price)
- Account size: $10,000
- Risk per trade: 1% = $100
- Bitcoin entry: $95,000 | Stop-loss: $92,000
- Risk per BTC: $3,000
- Position size: $100 ÷ $3,000 = 0.0333 BTC ($3,167 position)
If Bitcoin drops to $92,000 you lose exactly $100 — 1% of your account. The position size calculator does this automatically for any account size, entry, and stop-loss level.
Position Size Examples Across Different Account Sizes
| Account Size | 1% Risk ($) | Position Size (BTC) | Position Value ($) | Account Exposure |
|---|---|---|---|---|
| $1,000 | $10 | 0.00333 | $316 | 31.6% |
| $5,000 | $50 | 0.01667 | $1,583 | 31.7% |
| $10,000 | $100 | 0.03333 | $3,167 | 31.7% |
| $25,000 | $250 | 0.08333 | $7,917 | 31.7% |
| $100,000 | $1,000 | 0.33333 | $31,667 | 31.7% |
The account exposure percentage stays consistent at approximately 31.7% across all account sizes for the same entry and stop-loss. After calculating your position size, pair it with the crypto break-even calculator to understand exactly what price you need to cover fees before turning a profit.
Position Sizing With a Stop-Loss: The Complete 4-Step Process
Step 1 — Identify your entry price. The price at which you intend to enter. For limit orders, your target entry. For market orders, the current ask price.
Step 2 — Set your stop-loss at a technically meaningful level. Below a support zone, a recent swing low, or a key moving average — not an arbitrary percentage. The stop should be where your trade thesis is definitively wrong.
Step 3 — Calculate your risk per unit. Entry Price − Stop-Loss Price. BTC long at $95,000, stop at $91,500: risk per BTC = $3,500.
Step 4 — Calculate position size. (Account × Risk%) ÷ Risk per Unit. $15,000 account, 1% risk: $150 ÷ $3,500 = 0.0429 BTC.
| Entry | Stop-Loss | Risk/BTC | $15k Account — 1% Risk | Position Size (BTC) |
|---|---|---|---|---|
| $95,000 | $91,500 | $3,500 | $150 | 0.0429 |
| $95,000 | $93,000 | $2,000 | $150 | 0.0750 |
| $95,000 | $90,000 | $5,000 | $150 | 0.0300 |
| $95,000 | $85,000 | $10,000 | $150 | 0.0150 |
A wider stop-loss forces a smaller position. A tighter stop-loss allows a larger position for the same risk amount. This is the mathematically correct relationship — and it is the opposite of how most inexperienced traders operate.
Position Sizing for Crypto With Leverage
| Leverage | Entry | Liquidation Price (approx) | Move to Liquidation |
|---|---|---|---|
| 2× | $95,000 | $47,500 | -50% |
| 5× | $95,000 | $76,000 | -20% |
| 10× | $95,000 | $85,500 | -10% |
| 20× | $95,000 | $90,250 | -5% |
| 50× | $95,000 | $93,100 | -2% |
At 50× leverage, a normal 2% Bitcoin pullback — the kind that happens multiple times per week — triggers liquidation. Professional traders using leverage rarely exceed 3–5× and size positions so the stop-loss triggers before the liquidation price. Use the crypto profit calculator to model exact P&L at every price target before entering.
Risk-Reward Ratio: The Other Half of the Equation
Risk-Reward Ratio = (Target − Entry) ÷ (Entry − Stop-Loss)
| Entry | Stop-Loss | Target | R:R Ratio | Win Rate to Break Even |
|---|---|---|---|---|
| $95,000 | $92,000 | $98,000 | 1:1 | 50% |
| $95,000 | $92,000 | $101,000 | 2:1 | 33% |
| $95,000 | $92,000 | $104,000 | 3:1 | 25% |
| $95,000 | $92,000 | $107,000 | 4:1 | 20% |
A trader with a 2:1 risk-reward ratio only needs to win 33% of their trades to break even. Most professional traders require at least 2:1 before entering — no matter how good the setup looks.
Position Sizing by Asset Volatility
| Asset | Avg Daily Volatility | Typical Stop Distance | Position Size ($10k, 1% risk) |
|---|---|---|---|
| Bitcoin (BTC) | 2–4% | 3–5% | $2,000–$3,333 |
| Ethereum (ETH) | 3–5% | 4–6% | $1,667–$2,500 |
| Solana (SOL) | 5–8% | 6–10% | $1,000–$1,667 |
| Top 20 altcoin | 8–15% | 10–20% | $500–$1,000 |
| Small cap (<$500M) | 15–30%+ | 20–40% | $250–$500 |
Higher volatility forces smaller positions to maintain 1% risk. This is the system working correctly — it automatically limits exposure to more volatile assets without a separate decision for each one.
5 Position Sizing Mistakes That Blow Up Crypto Accounts
1. Sizing based on conviction instead of math
Use the position size calculator every single trade — regardless of confidence level.
2. Using the same dollar position size regardless of stop-loss distance
$2,000 into BTC with a 3% stop risks $60. $2,000 into SOL with a 15% stop risks $300. Always calculate from the stop distance.
3. Not accounting for trading fees
Use the break-even calculator to factor fees into every position. A $15 fee on a $100 risk trade reduces your effective stop by 15%.
4. Averaging into a losing position without recalculating total risk
If you add to a position, recalculate combined position size and total risk from scratch — both entries included.
5. Applying position sizing rules only when convenient
The trades where you most want to go big are almost always the trades where a violent reversal is most likely. Discipline must apply to every trade, especially those.
Frequently Asked Questions
What is the 1% rule in crypto trading?
How do I calculate position size for a crypto trade?
What is a good risk-reward ratio for crypto trading?
How much of my portfolio should I put into one crypto trade?
Does position sizing work differently for leveraged crypto trades?
Can I use the same position sizing rules for Bitcoin and altcoins?
Methodology & Data Sources
Position Size Formula: (Account Size × Risk%) ÷ (Entry Price − Stop-Loss Price).
Liquidation Formula: Entry Price × (1 − 1/Leverage) for long positions. Simplified; actual prices vary by exchange maintenance margin requirements.
Volatility Data: 90-day realised volatility from CoinGecko, July 2026.
Disclaimer: For informational purposes only. Does not constitute financial advice. Most retail traders lose money trading leveraged crypto products.
Last reviewed: July 2026 by the CryptoToolkit Editorial Team.
Calculate the exact position size for your next trade with the free crypto position size calculator. Pair it with the break-even calculator to factor in fees, and the crypto profit calculator to model P&L at every price target before you enter.