Position Size Calculator

Position size is key to unlocking the most potential out of your trading. It determines how much of your bankroll you're risking on every trade and finds the perfect spot between your bankroll, stop loss, and risk tolerance.

Updated October 23, 2026

That's exactly why this position size calculator is your new best friend moving forward. Regardless of what asset you're trading, it helps you zero in on the correct trading size based on your total bankroll, the price of the asset, your stop loss, and how much of your bankroll you're willing to risk on any given trade.

Without a position size calculator forex, you could easily overleverage your account or take on overly risky positions. But with our tool, you put yourself right in the driver's seat. You'll know exactly what you're doing and keep a tight rein on your risk exposure. Decide how much risk you wish to take on, and our crypto and stock position size calculator does all the analysis for you as it adjusts your position size based on cold hard numbers.

How our calculator works

There isn't a single bulletproof trading strategy that wins each time you use it. If you're out there looking for a moonshot while risking too much on the line, a couple of bad trades could decimate your bankroll in a heartbeat.

On the other hand, if you risk too little, you're just leaving money on the table, and that's a waste. That's where our position size calculator stocks comes in. Think of it as your trading roadmap and risk management tool telling you exactly how much you should risk based on your trade levels, bankroll/account size, and risk profile. It allows you to see how different market scenarios can affect your profits and losses, so you're never in the dark about the what-ifs and hypothetical scenarios.

Account size

This is your account balance, or the total amount of capital in your account that you're willing to use for trading.

Trade: long or short

These buttons enable you to buy assets. If you’re buying a particular asset, select “long.” If you intend to profit from the price of the asset declining or shorting it, select “short.”

Entry price

The entry price is the price at which you are buying the underlying asset.

Stop Loss

Stop loss is the price at which you’ll exit the trade if the asset’s price drops to a certain point away from your anticipated direction. It automatically sells the underlying asset when a predetermined price threshold is reached. A stop loss helps you limit your potential losses and mitigate the risk you’re taking on a particular trade. The stop loss must be below the entry if buying, or above the entry if shorting.

Account Risk

Account risk refers to the “%” and “$” buttons on our forex position size calculator. The “%” button refers to the percentage of your account balance you’re willing to risk on the trade. Pro traders usually risk no more than 1% of their account balance on any given trade. Anything past 5% is extremely risky and not recommended. The “$” button refers to the dollar amount you’re willing to risk on the trade. The amount should be a small amount commensurate with your account size. For instance, you could risk up to $10 on each trade on an account size of $1,000.

Total position amount

Total position amount refers to the total dollar value or amount of capital allocated to a specific position or trade. In essence, it is the total cost of the position calculated as the position size multiplied by the entry price. For instance, 100 shares at $50 create a total position amount of $5,000.

Optimal position size

The optimal position size refers to the ideal amount of a particular asset to buy. Purchasing this optimal position size of the asset based on account size and stop loss leads to obtaining a desired account risk on the trade.

Risk size calculator

Risk size calculation refers to the dollar amount being risked, expressed by the following equation: Account Risk % x Account Size, or the dollar amount in the Account Risk $ box. This represents the dollar amount being risked on the particular trade in question.

Understanding leverage in trading

In trading, leverage is like borrowing money to amplify your potential profits. Sounds sweet, right? But here’s the catch - while it can boost your gains, it can also blow up your losses if you're not careful. Think of it like using a magnifying glass: you can make things look huge, but if you're not in control, you could start a fire you can't put out. So understanding leverage is crucial. It’s all about using borrowed money to control larger positions, but knowing your limits, managing risk, and making sure you don’t get caught on the wrong side of the trade.

Leverage, in essence, increases the buying power of your account size. 10:1 leverage means you can open trades with a value of 10x the existing capital in your bankroll. 100:1 leverage, meanwhile, allows you to magnify your capital by up to 100 times.

For instance, if you have $1,000 in the account with 100:1 leverage enabled, you’ll be able to buy as much as $100,000 in leveraged positions. Trading with leverage lets you open larger position sizes that can maximize your profits, but also magnify your losses on trades.

Long leveraged stop loss

If you multiply your position size by the number in the Leverage field, the Long and Short Leveraged Stop Loss will show you where your stop loss needs to move, not to exceed your desired risk exposure to the account. If the stop loss doesn’t get any closer to the entry price, and you increase your position size, you may end up losing more than you wanted in case you hit the stop loss you indicated.

Short leveraged stop loss

Long Leveraged Stop Loss

The Short Leveraged Stop Loss is the flip side of the coin, wherein you’re using leverage to short a position. You basically bet on the market to go down. Just like with long leveraged positions, this represents the stop loss in place to protect yourself. The position size calculator helps you figure out that sweet spot for your stop loss, based on the leverage you’re using, your account size, and how much risk you're willing to take. It’s about keeping your losses in check and making sure your short trades don’t turn into a nightmare.

Profit

Profit indicates the profit on your positions multiplied by leverage under the assumption that the profit targets indicated in the calculator are attained.

Risk Size

Risk size indicates the calculation of the risk you take on a trade based on your current parameters. However, if you increase your position size without adjusting your stop loss to the Long or Short Tight Stop Loss levels, your actual risk may exceed your expectations.

Position sizing in stock trading

Risk Size

Let’s say you’re looking to buy Apple (AAPL) at $125. You’ve got a $30,000 account, and thanks to 2:1 leverage, you’re able to play with $60,000 worth of buying power.

Now, you're cool with risking just 2% of your $30,000 account on this trade. That’s $600 (because 2% of $30,000 is $600).

Your stop loss is set at $120, meaning you’re willing to let the stock drop $5 from your $125 entry before you cut the loss.

So, here’s the math:

Risk per share = $5 (the drop from $125 to $120).

Now, let’s figure out how many shares you should buy without exceeding that $600 risk limit. You divide $600 (your max risk) by $5 (the amount you're willing to lose per share):

$600 ÷ $5 = 120 shares.

That’s the magic number. 120 shares is the size of your position if you want to stay within that $600 risk threshold.

Now, to find out how much cash you need to buy those 120 shares:

120 shares × $125 per share = $15,000.

This means you’re going to need $15,000 to take this position. Since that’s less than your $30,000 account, you don’t need to use leverage for this trade.

To sum it up, if you buy 120 shares, and the price drops by $5 per share (your stop loss), you’ll lose $600, which is exactly 2% of your $30,000 account.

Change one number and watch what happens. Move that stop from $120 up to $122 and your risk per share drops to $3, which means the same $600 now buys 200 shares instead of 120. Capital needed climbs to $25,000. Bigger position, identical risk on paper, except a $3 stop sits much closer to ordinary daily noise than a $5 one does. Tightening a stop to justify more size is a trade-off, not a free upgrade, and it is the most common way traders talk themselves into a position that gets shaken out.

Forex position size example

Position Sizing in Stock Trading

Imagine you're looking to buy the EUR/USD at 1.0525. You've got a $5,000 account and, thanks to some generous 50:1 leverage from your broker, you're able to play with $250,000 in buying power.

Now, you’re okay with losing just 1% of your $5,000 account on this trade. That works out to $50 (because 1% of $5,000 is $50).

Your stop loss is set at 5 pips below your entry price, so you’re willing to let the price dip down to 1.0520 before you pull the plug.

Now let’s figure out how many standard lots to buy.

You can risk up to $50 on this trade.

Here's the key thing to know: each pip of movement in EUR/USD is worth $10 per standard lot. You can double-check this for any pair and lot size with our pip calculator, and for coin positions the crypto position size calculator runs the same logic in units rather than lots.

Your stop loss is 5 pips away from your entry at 1.0520.

Now, let’s run the numbers:

Account Risk ÷ (Pip Value × Pips at Stop Loss) = Position Size in Standard Lots

So: $50 ÷ ($10 × 5 pips) = 1.

That means you can trade 1 standard lot. You know it’s a standard lot because we used the $10 pip value for a standard lot in the calculation.

This 1 standard lot is the ideal position size for your account, stop loss, and risk tolerance.

Just to make sure you’re clear: a standard lot in EUR/USD is €100,000. At the current exchange rate of 1.0525, that’s $105,250.

Now, with your $5,000 account, you’re trading $105,250 worth of EUR/USD, which means you’re using at least 21x leverage ($105,250 ÷ $5,000). That’s the amount of leverage required to make this trade work with your account balance.

So, to sum it up: You can trade 1 standard lot, you’ve got your risk covered at $50, and everything lines up with the leverage you’re using**.**

Mistakes that break the calculation

Forex Position Size Example

Sizing before the stop is placed. The stop distance feeds the formula, so choosing your lot size first means the risk figure lands wherever it lands.

EUR/USD at 1.0525

Using your starting balance after a drawdown. Down 15 percent on the month and still sizing off the original number? Every trade now risks more than your rule allows, at exactly the wrong time.

Treating leverage as a target rather than a ceiling. It decides whether you can fund the position, not how big it should be.

Assuming $10 per pip everywhere. That figure holds for a standard lot on dollar-quoted majors and nowhere else reliably. Yen pairs and crosses need converting.

Overriding the output because a number feels too small. If you run the maths and then trade what feels right instead, the calculation was decoration.

Using it as part of a routine

The traders who get value out of this tool run the same sequence every time: find the setup, mark the level that proves it wrong, put the stop there, enter the numbers, trade what comes back.

Twenty seconds once it becomes habit. What it removes is position size decided by how confident you happen to feel that morning, which is the single most common failure in retail trading. Confidence is not a risk parameter.

Keep the risk figure in your trade log next to the result. After thirty trades you will know whether your average loss matches what you intended to risk, and if it doesn't, the gap points straight at whichever step you have been skipping. Broker conditions matter here too, since spread and swap sit on top of the maths, and our brokers hub compares them side by side.

FAQ

What is a position size calculator?

A tool that tells you how many shares, lots or units to trade so a stop-out costs a set amount. Feed it your account size, entry price, stop level and risk tolerance, and it returns the size, the capital required and the cash at risk. Same logic across forex, stocks, crypto and CFDs.

How does the position size calculator work in 2026?

It divides your account risk by your risk per unit. Risk 1 percent of a 5,000 dollar account and you have 50 dollars to work with. If the stop sits 5 dollars per share away, that is 10 shares. For forex the same logic runs on pips and lots instead.

How is the result calculated?

Position size equals account risk divided by risk per unit. On stocks that means account size times risk percent, divided by the gap between entry and stop. On forex it is account risk divided by pip value times pips to the stop. Multiply the result by entry price and you get the capital needed.

What values do I need to enter?

Four: account size, entry price, stop loss, and how much you are willing to lose as a percentage or a cash figure. Pick long or short so the tool knows which side of entry the stop belongs on. Leverage and targets are optional and only affect funding and reward outputs.

Can I use it for crypto as well as forex?

Yes, because the maths works from the distance between entry and stop rather than anything instrument-specific. For coins with wide daily ranges the dedicated crypto version is more convenient, and the pip calculator handles pip values on any currency pair.

How much should I risk per trade?

One percent of the balance is the standard professional benchmark and 2 percent a common ceiling. Past 5 percent an ordinary losing streak becomes account-threatening: six losses in a row at 5 percent takes roughly a quarter of the balance, and clawing that back needs a 33 percent gain.