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Position Size Calculator

The tool pros use on every trade: decide what % of your account to risk, set your entry and stop, and get the exact position size so a stop-out loses only what you planned. Free, no signup needed.

Your plan
Risk per trade1%
Leverage (for margin)
×
Your position
Position size
$1,000.00
10 units · long ▲
You risk
$50.00
if your stop is hit (1% of account)
Stop distance
-5.00%
entry → stop
Max safe leverage
20×
stopped before liq
Margin at 10×
$100.00
what you put up
Notional
$1,000.00
total position value
To risk $50.00 (1% of $5,000.00), buy 10 units ($1,000.00) with your stop at $95.00. A stop-out loses exactly your $50.00 - no more.

Sizing assumes your stop fills at the price you set (slippage on fast moves can lose a bit more). Max safe leverage is a simplified isolated-margin estimate. Educational only, not financial advice.

Most traders don't lose on the math - they lose to FOMO.

You just nailed this calculator. But a calculator can't stop a revenge trade, a round-trip, or an account you never track. A free CryptaDash account makes the discipline automatic - 20 seconds, no card.

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How position sizing works

Instead of guessing how much to buy, you start from risk. Pick a fixed % of your account to risk per trade (1% is a common rule), then your stop distance decides the size: the tighter your stop, the larger the position you can take for the same dollar risk - and the wider your stop, the smaller it must be.

The formula

Position size ($) = (account × risk%) ÷ (distance from entry to stop, as a %). So if a stop-out always costs the same fixed slice of your account, one bad trade can never blow you up.