Crypto Position Size Calculator

Calculate optimal position size from risk per trade and stop-loss distance. Supports long/short and leverage.

Risk Amount
$100.00
Stop Distance
1,000
Position Size (Base Units)
0.1
Position Value
$5,000.00
Leverage
10×
Initial Margin Required
$500.00
Position sizing uses a simplified risk model: size = (balance × risk%) ÷ |entry − stop|. Fees, funding, and slippage are not included.

What is a crypto position size calculator?

A crypto position size calculator helps you convert risk per trade into an objective position size using your entry and stop prices. It keeps your downside consistent across trades, improving risk-adjusted performance and reducing emotional sizing.

What are the technicals?

  • Risk amount: account balance × risk% per trade.
  • Stop distance: |entry − stop|; for longs, stop below entry; for shorts, stop above entry.
  • Position size (base): risk amount ÷ stop distance.
  • Notional value: position size × entry price.
  • Initial margin: notional ÷ leverage (simplified, fees not included).

How do you calculate position size?

Formula: Position size (base units) = (Account balance × Risk%) ÷ |Entry − Stop|.

Example: $10,000 balance, 1% risk (= $100), long BTC at $50,000 with stop at $49,000 → Stop distance = 1,000 → Size ≈ 0.1 BTC.

Notes: Consider fees, slippage, maintenance margin, and funding in live trading. This tool offers educational guidance, not financial advice.

Biggest benefits of using this calculator

  • Enforce consistent risk and avoid emotional trade sizing.
  • Quickly translate a stop level into objective quantity.
  • Estimate margin needs alongside size and leverage.
  • Improve capital efficiency with clear risk caps per trade.
  • Great for both futures and spot margin strategies.

FAQ

What inputs are required for position sizing?▼
Account balance, risk% per trade, entry price, stop price, side (long/short), and optional leverage to estimate initial margin.
How do I handle long vs. short stops correctly?▼
For longs, place the stop below entry; for shorts, above entry. The calculator uses absolute distance |entry − stop| to keep risk symmetric.
Does this consider fees and slippage?▼
Not directly. For live trades, add a buffer to risk or tighten position size to accommodate fees and potential slippage.
Can I use this for spot margin or futures?▼
Yes. The sizing logic is general; margin estimates are simplified and differ by venue and product. Always check exchange rules.

Related tools

Margin Calculator

Estimate required collateral and ROE for leveraged trades.

Slippage Calculator

Estimate execution price impact and cost from order size and liquidity.

User comments

Jamie

2025-02-01

Finally a clean position sizer—great for risk discipline.

👍 21 likes

Nguyen

2025-02-04

Love the simple formula and margin estimate in one place.

👍 17 likes

Priya

2025-02-07

Helps me keep risk fixed even when volatility changes.

👍 14 likes

Leo

2025-02-10

Clear long/short handling for stop distance. Nicely done.

👍 11 likes

Sofia

2025-02-12

My go-to before every trade. Please add fee presets next.

👍 9 likes

Arman

2025-02-15

Pairs well with the margin calculator for futures sizing.

👍 8 likes

Mina

2025-02-16

Great UX and fast results on mobile.

👍 7 likes