Crypto Position Size Calculator
Work out how many coins to buy so a stop-loss caps your loss at a fixed percentage of your account.
For general estimates only — not financial advice. You enter your own prices; nothing here pulls live market data.
How it works
Good position sizing starts from how much you're willing to lose, not how much you want to make. Enter your account size and the percentage you'll risk on this trade, and the calculator turns that into a dollar risk amount.
Your stop-loss defines the loss per coin: it's the gap between your entry price and where you'd bail out. Divide the dollar risk by that gap and you get the exact number of coins whose loss at the stop equals your risk amount.
Risk 1% of a $10,000 account with a $30,000 entry and a $28,500 stop, and the $1,500 gap means you'd buy about 0.067 coins — roughly a $2,000 position. Hit the stop and you're down exactly your $100 planned risk.
Frequently asked questions
Why is my position bigger than my risk?
A tight stop lets you hold more coins for the same risk, because each coin can only fall a little before you exit. The dollar position can dwarf the risk amount when the stop is close to entry.
What if my stop equals my entry?
Then there's no defined risk per coin and the math can't size the trade, so the result shows a dash. Set a stop-loss below your entry (or above, for a short) to get a number.
Does this account for leverage or fees?
No. It sizes the raw position to your risk. If you trade with leverage or pay meaningful fees, treat the result as a starting point and shade it down a touch.