iOS · macOS
Position Sizer
Limit losses, max your profit.
The number one discipline in trading is managing risk. Position Sizer works out exactly how many shares or units you can buy or sell, based on the maximum percentage of your account you're willing to risk — so a stop-out never costs more than you decided it should.
$4.99 · one-time purchase
Instant position sizing
Enter account size, risk %, entry, and stop loss — get position size, risk amount, and position value the moment you type.
5R take-profit target
Every calculation includes an automatic take-profit target, five times your risk, so you always know where you're aiming.
Long-press to copy
Hold down any value to copy it straight to your clipboard, then paste it into your broker's order form.
Private by design
No account, no network connection, no analytics. Every number stays on your device.
How it works
Set your stop loss
Just beyond the recent local dip (long) or local peak (short).
Enter your numbers
Account size, stop loss, entry price, and the % you're willing to risk — 2% is a common maximum per trade.
Get your position size
Position Sizer instantly works out how many units to trade, plus your 5R take-profit target.
Copy into your broker
Long-press any value to copy it, then paste it straight into your broker's app.
Position Sizer is a calculation tool only. It does not provide financial, investment, or trading advice, and is not a substitute for your own judgment or professional guidance.