Crypto Position Size Calculator
Find the position size that keeps your loss within your risk limit if the stop-loss is hit. Set your account size, the percent you are willing to risk, your entry, and your stop.
Position sizing controls how much you lose when a stop is hit; it does not control whether the trade wins. This tool assumes a spot position and does not model leverage liquidation or fees.
How Position Sizing Works
The idea is to fix your dollar loss before you enter. You choose how much of the account to risk, for example 1 percent of $10,000 is $100. The distance from your entry to your stop is the loss per unit. Dividing your dollar risk by that per-unit loss tells you how many units to buy so a stopped-out trade costs exactly your chosen amount.
Why it matters
Consistent sizing is what keeps a losing streak from ending your account. Two traders with the same strategy and very different sizing can have completely different outcomes. Sizing is the part of trading you fully control.
Frequently Asked Questions
How do I calculate position size from risk?
Decide how much of your account you are willing to lose on the trade (account size times risk percent). Divide that by the per-unit risk, which is the distance between your entry and your stop-loss. The result is how many units to buy so that hitting the stop loses exactly your chosen risk.
What is a sensible risk per trade?
Many traders risk 1 to 2 percent of their account per trade so that a string of losses does not seriously damage the account. The right number depends on your strategy and tolerance. This calculator lets you set it.
Why does position size depend on the stop-loss?
A tighter stop means a smaller loss per unit, so you can hold more units for the same dollar risk. A wider stop means a larger loss per unit, so you hold fewer units. Position size and stop distance move together to keep your dollar risk fixed.
Does this account for leverage?
This calculates the position size in units and notional value based on your dollar risk. If you use leverage, the same notional value requires less margin, but your risk per unit and stop logic are unchanged. Leverage adds liquidation risk, which this tool does not model.
Does TradeArmor manage position sizing automatically?
Yes. TradeArmor's DCA engine, keep-balance reserve, and per-position rules size and stage entries for you based on your configuration, so you are not sizing every trade by hand.