Lot Size Calculator
Calculate the optimal lot size for your trade based on your account balance, risk percentage, and stop loss distance.
Enter Your Parameters
How to Use This Calculator
- Enter your account balance – The total amount in your trading account.
- Set your risk percentage – Most professionals risk 1-2% per trade. Never risk more than you can afford to lose.
- Enter your stop loss in pips – The distance from your entry to your stop loss level.
- Select your currency pair – The pair you're planning to trade.
- Read your Lot size – Use this lot size for your trade to maintain proper risk management.
What is a Lot Size Calculator?
A Lot Size Calculator – Calculate Your Forex Position Size determines exactly how many lots to trade based on your account size, risk tolerance, and stop loss distance. This is the foundation of proper risk management.
Instead of trading random lot sizes, professional traders calculate position size for every trade to ensure consistent risk exposure, typically 1-2% of account balance per trade.
Use our free lot size calculator to determine the optimal position size for your forex trades. This position size calculator helps you manage risk by calculating the exact lot size based on your account balance, risk percentage, and stop loss distance – all with real-time pip values.
Whether you're trading major pairs like EUR/USD or exotic currencies, proper lot sizing is essential for long-term trading success. Our calculator supports standard lots (100,000 units), mini lots (10,000 units), and micro lots (1,000 units).
Key Features
- Risk percentage input
- Stop loss in pips
- Account currency support
- All currency pairs
- Standard/mini/micro lots
- Live pip value integration
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Frequently Asked Questions
The 2% rule states you should never risk more than 2% of your account on a single trade. With a $10,000 account, maximum risk per trade = $200. This protects your capital during losing streaks.
A lot size represents the number of currency units in a trade. Standard lot = 100,000 units, mini lot = 10,000 units, micro lot = 1,000 units. Choosing the right lot size is crucial for proper risk management.
Use this formula: Lot Size = (Account Balance × Risk %) ÷ (Stop Loss in Pips × Pip Value). For example, with a $10,000 account risking 2% with a 50-pip stop loss, your lot size would be 0.40 standard lots.
For a $1,000 account with 2% risk ($20 per trade), you should use micro lots (0.01-0.10 lots depending on stop loss). Using our calculator ensures precise sizing for smaller accounts.
They mean the same thing. "Lot size" refers to the standard forex measurement (lots), while "position size" is a general term for trade volume. Both determine how much currency you're buying or selling.
Leverage affects your margin requirement, not the lot size calculation. However, with higher leverage, you can open larger positions. Always calculate lot size based on risk percentage, not available margin.
Professional traders don't use a fixed lot size – they calculate it fresh for every trade based on their risk percentage (typically 0.5%-2%) and stop loss distance. This is called dynamic position sizing.
Lot size is how many units you trade (1 lot = 100,000 units). Leverage is the borrowing power your broker provides (1:100 means control $100,000 with $1,000). Lot size determines actual risk; leverage enables larger positions.
You can have a 70% win rate strategy and still blow your account with poor position sizing. Conversely, consistent position sizing with a 45% win rate but 1:2 R:R is profitable. Risk management is the foundation.