Free tool · no login

Position Size Calculator

How many shares should you buy? Enter your capital, how much you're willing to lose on this trade, your entry and your stop-loss.

Many swing traders use 0.5%–1%.

Usually just above the pivot.

Below the base low, or a fixed % below entry.

Optional cap, e.g. 20–25%. Leave 0 for no cap.

Buy

250

shares · position ₹1,03,000 (20.6% of capital)

Risk amount
₹5,000
Stop-loss
₹392.00 (4.9% below)
Risk per share
₹20.00
Loss if stopped
₹5,000
2R level
₹452.00
3R level
₹472.00

2R / 3R = price where the gain is two or three times the amount risked. Brokerage, taxes and gaps can make the real loss larger.

How the calculation works

Risk amount = capital × risk %
Risk per share = entry − stop-loss
Quantity = risk amount ÷ risk per share

The quantity comes from the distance to your stop, not from how much you like the chart. A wider stop means fewer shares, so the rupee risk stays the same.

Example: ₹5,00,000 capital, 1% risk = ₹5,000. Entry ₹412, stop ₹392 → ₹20 risk per share → 250 shares (₹1,03,000, about 21% of capital). With a ₹40 stop it would be 125 shares — same ₹5,000 risk. More in the stop-loss guide and how much capital you need.

Questions

How do you calculate position size in swing trading?

Decide how much of your capital you are willing to lose if the stop-loss is hit (for example 1%). Divide that rupee amount by the risk per share — the distance between your entry and your stop-loss. The result is the number of shares to buy. Example: ₹5,00,000 capital × 1% = ₹5,000 risk; entry ₹412, stop ₹392 → ₹20 risk per share → 250 shares.

How much should I risk per trade?

Many swing traders risk 0.5%–1% of capital per trade, and less when the market is weak. The right number is one you can keep using through a losing streak without changing your plan.

Where should the stop-loss go?

Either below the base low — where the trade idea is clearly wrong — or a fixed percentage below your entry (for example 5%). Decide it before you buy; never move it lower.

Why cap the position size?

With a very tight stop the formula can suggest a very large position. Prices can gap past a stop, so many traders also cap any single position at a set share of capital, such as 20–25%.

Is this calculator free?

Yes, free and without login. The same calculation is built into the N.E.X.T platform as the Qty Calculator, next to the charts and the Trade Journal.

Built into N.E.X.T

The Qty Calculator sits next to the charts, the 3 focused scans and the Trade Journal — so every trade is sized and logged in one place.

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