Free · Private · No sign-up

Size every trade from the risk you can afford.

Enter balance, risk %, entry and stop. Get units, lots, exposure and reward:risk instantly — then track planned trades in a simple R-based journal.

Open Position Size →How it works

Stocks · forex · crypto · futures. Works on iPhone, Android and desktop.

Position size result with max loss and reward to risk

Features

A calculator and journal — never signals or advice.

Risk-first sizing

Units = risk amount ÷ distance to stop.

Long or short

Direction detected from your stop.

Reward : risk

R multiple and profit at target.

R journal

Win rate, average R and total R.

Lots & contracts

Set units per lot for forex or futures.

Private

No broker login, nothing uploaded.

See it in action

Real screens from the app.

Position size result with max loss and reward to risk
Position size result with max loss and reward to risk
Trade journal with win rate and total R
Trade journal with win rate and total R

Who it is for

Real situations where Position Size Calculator saves time.

New traders

Learn to risk a fixed % instead of guessing size.

Swing traders

Plan entries with a clear max loss.

Trading educators

Show students how sizing works.

How it works

Up and running in under a minute.

  1. 1

    Account

    Enter balance and risk % per trade.

  2. 2

    Plan

    Enter entry, stop-loss and optional target.

  3. 3

    Journal

    Save the plan and record the result in R.

Open Position Size →

Your data stays on your device

Everything you type stays in this browser on this device (localStorage). There is no account, no server database and no tracking of what you enter.

Important: Educational calculator only. Not financial advice and no buy/sell signals. Trading involves substantial risk of loss.

Frequently asked questions

 

Does it tell me what to buy?

No. It only does sizing maths for a plan you made.

Does it include fees or slippage?

No. Leave a buffer for fees, spread and slippage.

Is it free?

Yes, free with no sign-up.

Is my data uploaded?

No. It stays in your browser.

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