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Lot Size Calculator

The most important part of trading isn't finding the perfect entry. It is making sure you don't risk too much of your money on a single trade. Our lot size tool tells you exactly how many units to buy or sell so you stay within your risk limits.

1. Input Parameters

2. Calculated Risk Metrics

Max Cash Risk Allowed$100.00 USDExactly 1% of account balance.
Calculated Lot Size0.5 LotsEquivalent to: 50,000 units of base currency
Formula Applied:
Lot size = Risk Amount ($) / (Stop Loss in Pips × Pip Value per Standard Lot)
Verify your broker contract specification: standard lot size represents 100,000 currency units (Forex) or 100 ounces (Gold).

Why Position Sizing Matters

Many new traders make the mistake of using the same lot size for every trade. This is dangerous because every trade has a different stop loss distance. If you use the same size on a trade with a wide stop loss as you do on one with a tight stop loss, you are actually risking much more money on the first trade.

By using a calculator, you ensure that your risk stays consistent. If you decide to risk 1% of your account, you will lose exactly 1% whether your stop loss is 10 pips or 100 pips away. This consistency is what allows professional traders to survive losing streaks and stay in the game long enough to see their strategy work.

Trading planning and risk management illustration

The Simple Lot Size Formula

You can calculate your trade size manually using a simple mathematical approach. Understanding the logic behind the numbers helps you become a more confident trader.

Lot Size = Risk Amount / (Stop Loss × Pip Value)

  • Risk Amount: The cash value you are willing to lose (Balance × Risk %).
  • Stop Loss: The distance in pips between your entry and exit.
  • Pip Value: The dollar value of a single pip for one standard lot.

For a standard Forex pair like EUR/USD, the pip value is usually $10 for a full lot. If you want to risk $100 with a 20 pip stop loss, the math would be $100 divided by 200, which equals 0.50 lots. Our tool handles all these conversions for you instantly.

Real World Examples

Forex Example (EUR/USD)

You have $5,000 and risk 1% ($50). Your stop loss is 25 pips. The calculator will recommend 0.20 lots. If you hit your stop loss, you lose exactly $50.

Gold Example (XAU/USD)

Gold moves in larger dollar amounts. If you have $10,000 and risk 1% ($100) with a $5 move stop loss, the calculator ensures your position size respects that $100 limit.

Bitcoin Example (BTC/USD)

Since Bitcoin is priced in whole dollars, the calculation is even simpler. If Bitcoin is at $60,000 and your stop loss is at $59,000, your risk distance is $1,000. The tool tells you exactly how many BTC units to buy.

Common Questions about Lot Sizes

What is a standard lot in Forex?

A standard lot represents 100,000 units of the base currency. For most pairs, this means every pip of movement is worth about $10.

How much should I risk per trade?

Most experienced traders recommend risking no more than 1% or 2% of your account balance. This allows you to handle several losses in a row without damaging your capital too much.

Does this tool work for micro lots?

Yes. The calculator provides the exact decimal value. For example, 0.01 is one micro lot, and 0.10 is one mini lot. You can use these values with any broker.