Size your trade with disciplined risk management. Enter your account capital, risk per trade, entry and stop-loss prices to calculate how many units you can buy or sell, the amount at risk, capital allocation and your risk/reward ratio — with live results in Indian ₹ formatting.
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A trading position calculator helps you decide how many shares or units to buy or sell before you enter a trade. Instead of guessing a quantity, it uses your account capital, the percentage of capital you are willing to risk, your entry price and your stop-loss price to suggest a disciplined position size. This keeps every trade tied to a clear risk plan rather than emotion.
Position sizing is the part of a trading plan that controls how much money is at stake on a single trade. A position sizing calculator turns your risk rule into a concrete quantity, so a losing trade only costs the amount you planned to risk. Consistent position sizing is one of the most important habits for long-term trading discipline — no single loss should be large enough to wipe out a meaningful part of your capital.
Your account capital is the base for every calculation. With a fixed risk percentage, a larger account produces a larger risk amount and therefore a larger position; a smaller account produces a smaller position. The calculator also checks that the suggested quantity does not exceed what your capital can actually purchase at the entry price.
The risk per trade is the percentage of capital you accept losing if the stop-loss is hit. A higher risk percentage increases the risk amount and the suggested quantity; a lower risk percentage reduces both. Many traders keep trading risk per trade small — often around 1% — so a string of losses stays manageable.
The distance between your entry price and your stop-loss price is the risk per unit — the amount you lose per share or unit if the stop is triggered. A wider stop increases risk per unit and reduces the quantity you can take for the same risk amount; a tighter stop reduces risk per unit and increases the quantity. This is the basis of stop loss position sizing.
Position value is the full market value of your trade (entry price × quantity) — the capital allocated to hold the position. The amount at risk is only what you lose if the stop-loss hits (risk per unit × quantity). These are different numbers: a position can be worth many times more than the amount actually at risk.
The target price is optional. When supplied, the calculator measures the distance from entry to target and multiplies it by the practical quantity to estimate potential profit. It also expresses that profit as a return on the position value. Without a target, only the risk side of the trade is calculated.
The risk reward calculator divides potential profit by actual risk to produce a ratio such as 1:2, meaning the expected reward is twice the risk. A higher ratio means more potential profit per unit of risk. The ratio is a planning tool — it does not guarantee the trade will work out.
Most markets trade in whole shares or units, so the calculator rounds the risk-based quantity down to the nearest whole number. This means the actual risk after rounding is usually slightly smaller than the planned risk. The share quantity calculator shows both the raw calculated quantity and the rounded practical quantity.
Even when your risk rule allows a large quantity, your account capital may not be enough to buy that many units at the entry price. The stock position calculator computes a capital-based maximum and uses the smaller of the risk-based quantity and the capital maximum as the practical quantity, with a clear warning when capital is the limiting factor.
A Long position buys first and profits when price rises — the stop-loss sits below entry and the target sits above entry. A Short position sells first and profits when price falls — the stop-loss sits above entry and the target sits below entry. The calculator reverses the risk-per-unit and target-distance directions automatically based on your selection.
Every formula below matches the calculation engine used by this tool exactly.
A worked Long trade using the calculator engine.
This is an illustration of how the calculation works, not a recommendation to take the trade. Real outcomes depend on market conditions, brokerage, taxes, slippage and liquidity.
