Free Lot Size Calculator for Forex and Gold

Get your position size in seconds from your balance, risk and stop loss. Free, no sign-up, for EUR/USD, GBP/USD, gold and more.

How lot size is calculated

Lot size is the size of your position. When it's right, a trade that hits your stop loss loses exactly what you decided to risk.

The formula is: lots = money at risk ÷ (stop loss in pips × pip value per lot).

EUR/USD example: 10,000 USD balance, 1% risk (100 USD) and a 20-pip stop. On EUR/USD one standard lot is worth 10 USD per pip, so 100 ÷ (20 × 10) = 0.50 lots.

PipLog always rounds down, so you never risk more than you planned.

Frequently asked questions

How much is one pip worth on EUR/USD?

With one standard lot (100,000 units) each pip is worth 10 USD; with 0.10 lots it's 1 USD and with 0.01 lots, 0.10 USD. The same applies to GBP/USD, AUD/USD and NZD/USD, because they're quoted in dollars.

What percentage of my account should I risk?

Many traders risk between 0.5% and 2% per trade. On funded (prop firm) accounts, 1% or less is common to stay clear of the daily loss limit. Set it according to your own plan: this isn't financial advice.

Does it work for gold (XAU/USD)?

Yes. PipLog treats 1 gold pip as a 0.10 USD price move, which equals 10 USD on a 100-ounce lot. Some brokers measure gold pips differently, so check your account's contract specification.

Is it free?

Yes. The calculator is free, unlimited and needs no sign-up. The PipLog Pro trading journal costs 10 USD per month.