Position Size Calculator for Forex & Crypto

Decide how much money you are willing to lose on the trade (for example 1% of your account). Then measure the distance between your entry price and your stop-loss. Position size = money at risk ÷ stop distance. With $100 at risk and a stop $2 away, you can buy 50 units. If the stop is hit, you lose about $100, no matter how big the position looks.

The 1% rule means you never lose more than 1% of your account on a single trade. With $10,000 that is $100 per trade. It is a habit many trading books and courses teach, not a law: some traders use 0.5%, others 2%. The point is that a run of losing trades only takes a small bite out of your account, so you can keep going.

Work out the money at risk, then divide it by (stop-loss in pips × pip value per lot). For EUR/USD one standard lot (100,000 units) is worth about $10 per pip. Risking $100 with a 25-pip stop gives 100 ÷ (25 × 10) = 0.4 lots. A mini lot is 10,000 units (0.1 lots) and a micro lot is 1,000 units (0.01 lots).

A pip is the fourth decimal place for most pairs (0.0001) and the second for yen pairs (0.01). When the US dollar is the second currency of the pair, like EUR/USD or GBP/USD, one pip on a standard lot is worth $10. For USD/JPY it is 1,000 yen, which in dollars is 1,000 ÷ the USD/JPY rate. The calculator does this conversion for you.

No. Your position size comes from your risk amount and your stop-loss. Leverage only changes how much of your own money (margin) the exchange or broker locks while the trade is open. Higher leverage means less margin, but also a liquidation price closer to your entry, which can be hit before your stop-loss.

We use a simple isolated-margin estimate: for a long, entry × (1 − 1 ÷ leverage); for a short, entry × (1 + 1 ÷ leverage). At 10× a long from $100 is liquidated near $90. Real exchanges liquidate a little earlier because they keep a maintenance margin and charge fees and funding, so always check the number your exchange shows before you trade.

Yes. Pick gold, silver, oil, an index or a stock from the list (or type your own price) and the calculator gives the size in ounces, barrels, shares or units. The maths is the same: money at risk divided by the distance to your stop-loss. Prices are in US dollars.

A tight stop gives a big position, because each unit can only lose a little. That can need a lot of margin and a high leverage, and small price wiggles or spreads may knock you out. If the calculator says the margin is more than your balance, widen the stop or risk less.