Free tool

Position Size Calculator

Enter your account size, risk %, entry, and stop. We'll tell you exactly how many shares to buy so a stop-out costs no more than you decide.

Interactive: Position Size Calculator

Account size ($)

Risk per trade (%)

Entry price ($)

Stop price ($)

Buy this many shares

Max loss (1R)

$100.00

Target price (2R)

$54.00

Target profit

$200.00

Position value: $2,500.00 · Per-share risk: $2.00

How this works

The formula is Shares = (Account × Risk%) ÷ (Entry − Stop). That's it. Most traders blow up not because their edge is bad but because their size is wrong.

1% risk per trade survives a 10-loss streak (~10% drawdown).
5% risk per trade turns the same streak into a 40% drawdown — often terminal.
Target 2R means a winner pays double what a loser costs.

Want the full risk engine?

MyTradePilot enforces daily loss caps, sector concentration limits, and correlation checks automatically on every paper or live order.

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