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Free tool

Lot size calculator

Your lot size should come from the money you're willing to lose and the distance to your stop, never from how much you'd like to win. This calculator does the maths for you.

Fill in your balance and stop to see the lot size.

Approximate values. Check the contract size with your broker.

How to use it

  1. 1Enter your account balance and its currency (for a BRL or EUR account, type today's rate per US dollar).
  2. 2Choose the risk per trade: 0.5% to 1% is the professional range.
  3. 3Pick the asset and enter your stop distance in pips, points or dollars.
  4. 4Open the trade with the lot size shown, rounded down so you never risk more than planned.

Learn the method behind the numbers

Three short free lessons on the plan, the risk and the habits of traders who last.

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Questions

How is the lot size calculated?

Lot size = money at risk ÷ (stop distance × value of one pip per lot). With a $1,000 account, 1% risk ($10) and a 20-pip stop on EUR/USD ($10 a pip per lot): 10 ÷ (20 × 10) = 0.05 lots.

Why is my gold lot size so small?

One lot of gold is 100 ounces, so each $1 move is worth $100 per lot. Gold also moves several dollars a day, so the stop is wide and the lot has to be small to keep the same risk in money.

Does leverage change the lot size?

No. Leverage only decides how big a position the broker lets you open. Your risk comes from the lot size and the stop, which is why the calculator doesn't ask for leverage.

What if the result is below 0.01?

0.01 (a micro lot) is the smallest size most brokers allow. If the calculator shows less, your stop is too wide for your account and risk: skip the trade or use a closer, valid stop.

Keep reading

  • SetupsHow to trade a pullback to the 20-period moving average
  • MethodWriting rules for a chart setup: a fill-in template
  • SetupsBreakout and retest: how to trade it with written rules