Lot Size Calculator

The formula that protects your capital

Lot size is not a preference; it is the output of three inputs: capital, risk per trade and stop distance in pips. Lot size = (capital × risk %) ÷ (stop pips × pip value). You decide the money you accept losing, then pick the size that makes it your maximum loss.

Example: 5,000 dollars, 1% risk (50 dollars), a 25-pip stop. With a ten-dollar pip on a standard lot the right size is 0.2 lots. Size grows as the stop tightens and shrinks as it widens, so a volatile market needing a wider stop demands a smaller size — that is risk management in one line.

Using the calculator in practice

Start with a conservative 0.5%–1% risk per trade. At that level ten losses in a row still leave over 90% of your capital, which gives you the mental room to keep one plan instead of rewriting it after every loss.

• Enter your real balance, not the amount you plan to deposit later.
• Fix your risk percentage once and apply it to every trade.
• Place the stop at a logical technical level, then enter its distance in pips.
• Take the resulting lot size as it is; never round it up to chase profit.
• Recalculate as your balance changes so size grows with the account.

From correct sizing to consistent results

Most blown accounts fail not because the analysis was wrong but because size was too large for the stop. With correct sizing a loss becomes an ordinary cost within a series of trades, and the urge to move stops or double up disappears.

Pair this with the pip calculator for profit and loss and the margin calculator to confirm leverage is not locking too much of your balance, then revisit the academy risk-management lessons on reward-to-risk and judging a plan over a hundred trades rather than one. Educational only, not investment advice.