Position Size Calculator

Position Size Calculator

The position size calculator for crypto and stocks: enter balance, risk, entry and stop to get your exact size, risk-reward and P&L before you place the trade.

Risk/Reward & PnL

Your result will appear here

Fill in your trade and get position size, risk-reward and P&L instantly.

Everything is calculated in your browser. Nothing is sent anywhere.

How it works

How position size is calculated

Position size comes from three numbers you already have before the trade: the money in your account, the share of it you accept losing on this trade, and the distance from your entry to your stop-loss.

Position Size=Deposit × Risk %Entry − Stop-Loss
The distance between entry and stop-loss is taken as an absolute value, so one formula covers both long and short trades.
Deposit
The account balance the calculation is based on. Risk is taken as a share of it, so the same percentage means a different amount on a different balance.
Risk %
How much of the deposit you accept losing if the stop-loss is hit. It is the one number that keeps a losing streak survivable, which is why the size follows from it and not the other way round.
Position Size
How many units of the instrument to take so that a stopped-out trade costs exactly the amount you decided to risk.
Stop-Loss
The price at which the idea is wrong and the trade is closed. For a long trade it sits below the entry, for a short trade above it.
Take-Profit
The price at which part or all of the position is closed in profit. Several targets can share one position, each closing its own percentage.
Risk-Reward Ratio
Potential loss against potential profit. At 1 to 3 you can be wrong more often than right and still finish ahead, which is what makes it worth checking before you enter.

Worked example. Your deposit is 10,000 and you risk 1%, so 100 is the most this trade may cost you. You enter at 175 and place the stop-loss at 170, which is 5 away. Divide 100 by 5 and you get a position size of 20 units. Move the stop closer and the size grows, move it further and the size shrinks, but the money at risk stays at 100 either way.

Targets change the reward, not the risk. Add up to five take-profit levels with the share of the position each one closes, and the calculator returns the blended risk-reward ratio and the projected P&L for the whole trade.

FAQ

Questions, answered

What is a position size calculator?

A position size calculator tells you exactly how many units to trade based on your account balance, the percentage you want to risk, your entry price and your stop-loss, so a losing trade only costs what you planned.

What is the position size formula?

The core formula is simple: position size = (account balance × risk %) ÷ the distance from your entry to your stop-loss. Position Size Calculator runs it instantly and also factors in your take-profit targets to show risk-reward and projected P&L.

How does Position Size Calculator work?

In three steps: enter your balance and risk percent, add your entry and stop-loss, then get your exact position size, potential loss and risk-reward instantly. Add up to five take-profit targets to see the reward at each level.

Does it work for both crypto and stocks?

Yes. The same workflow handles crypto pairs and stocks, long or short, with no separate tools or spreadsheets.

Can I size both long and short trades?

Yes. Flip between long and short in a single tap, and your risk, reward and risk-reward update automatically.

Does it connect to my exchange or place trades?

No, it is a planning tool, not a trading bot. It does not connect to your exchange or place orders. You get your size, loss and targets, then copy them with one tap and paste them into your platform.

What is the difference between the app and the browser extension?

Both calculate your position size the same way. The Chrome extension is the quick desktop companion, one click away next to your terminal. The mobile app takes the same workflow with you, so you can size a trade wherever you are.

Does my trade data stay private?

Yes. All calculations run locally on your device or in your browser. Your balance, entries and trade details never leave it.

Get the app

Same calculator, wherever you trade

On your phone wherever you trade, or one click away in Chrome, right next to your terminal.