Crypto Position Size Calculator
Size a trade so a stop-loss costs only what you risk. Free, private, and calculated entirely in your browser.
Position Size Calculator
Work out how much to buy so a stop-loss only costs you the amount you decided to risk, and check the reward-to-risk ratio.
Risk amount
$100
Position size
0.033333
Position value
$2,000
Reward : risk
3 : 1
To risk 1% ($100) of a $10,000 account, buy 0.033333 units (about $2,000). Your stop is 5% away from entry, so if it hits you lose exactly your planned $100. At your target the reward-to-risk ratio is 3 to 1, a healthy setup.
How this is calculated
units = (account x risk%) / |entry - stop|; reward-to-risk = |target - entry| / |entry - stop|
- Sizes the position so a stop-out equals your chosen risk amount exactly.
- Ignores trading fees, funding, and slippage, which slightly increase real losses.
- A target price is optional; leave it blank to size on risk alone.