Options Profit Calculator

Enter the option type (Call or Put), your position (Buy/long or Sell/short), the strike price, the premium paid or received per share, the lot size (contract multiplier — 100 for standard US equity options; NSE India varies by underlying), the number of lots, and the underlying price at expiry you want to evaluate. The calculator computes the intrinsic value at expiry using max(S−K, 0) for calls or max(K−S, 0) for puts, subtracts (or adds) the premium for long (or short) positions, multiplies by the total share quantity, and shows your total P&L, break-even price, maximum profit, maximum loss, and a payoff diagram across a range of expiry prices.

For a long call: P&L per share = max(S − K, 0) − premium, where S is the underlying price at expiry and K is the strike. For a long put: P&L per share = max(K − S, 0) − premium. For short positions (selling the option), the sign is reversed: short call P&L per share = premium − max(S − K, 0); short put P&L per share = premium − max(K − S, 0). Multiply per-share P&L by the total quantity (lot size × number of lots) to get the position-level profit or loss.

The break-even price for a call option is the strike price plus the premium paid per share: Break-even = K + p. For example, if you buy a call with a strike of $100 and pay a $5 premium, you break even when the stock reaches $105 at expiry. This applies equally to the buyer (long call) and the seller (short call) — the short’s P&L is exactly zero at the same underlying price.

The break-even price for a put option is the strike price minus the premium paid per share: Break-even = K − p. For example, buying a put with a strike of $100 and a $4 premium means you break even when the stock falls to $96 at expiry. At any underlying price above $96, the put buyer loses money (up to a maximum loss of the premium paid); below $96, the put buyer profits.

For a long call (buyer), the maximum loss is the premium paid: max loss = premium × lot size × number of lots. This occurs if the stock expires at or below the strike price, making the call worthless. For a short call (seller), the maximum loss is theoretically unlimited — as the stock price rises above the break-even, the short seller’s loss grows without bound. This calculator displays “Unlimited” for the short call’s maximum loss rather than a finite number.

For a long put (buyer), the maximum profit is capped because the underlying price cannot fall below zero: max profit = (strike − premium) × lot size × number of lots, achieved if the underlying falls to zero at expiry. For a short put (seller), the maximum profit is limited to the premium received: premium × lot size × number of lots. This happens when the underlying expires at or above the strike price and the put expires worthless.

A long call has theoretically unlimited profit potential because there is no ceiling on how high a stock price can go — every additional point the stock rises above the break-even adds to the profit. Symmetrically, a short call has theoretically unlimited loss potential. Since no finite number accurately represents “no ceiling”, the calculator displays the label “Unlimited” for these cases, which is the standard convention used by OIC (Options Industry Council) and professional options analytics.

For long (buying) positions, the capital at risk is the premium paid, so ROI = P&L ÷ premium paid is a natural and complete measure. For short (selling) positions, the premium received is the maximum gain, but the capital at risk is actually the margin posted with your broker or exchange (SPAN margin), which can be many times the premium and varies by broker, exchange, and underlying volatility. Because the margin is not entered as an input, this calculator computes return relative to the premium received and labels it “Return on premium” with a caveat. Your actual return on margin will typically be much lower — and your actual risk much higher — than this figure suggests.

Yes. Enter the lot size for the specific NSE contract you are trading (e.g. Nifty 50 = 75, Bank Nifty = 35, or your underlying’s current lot size from NSE’s contract specifications) and set the number of lots. The premium field accepts the option price per unit (per share/unit of the underlying). The math is identical regardless of market or currency — select INR as your currency for Indian rupee display. Note: STT (securities transaction tax) on options exercise in India is not included; net P&L will be lower.

No — this calculator computes intrinsic value P&L at expiry only. It does not model time value (Theta decay), implied volatility (Vega), directional sensitivity (Delta), or any other Greek. If you need to value an option before expiry or understand its sensitivity to market changes, you would need a Black-Scholes model, which requires implied volatility as an additional input and is beyond the scope of this tool.

The payoff diagram (also called the options payoff chart or profit-loss graph) plots your total P&L on the vertical axis against the underlying price at expiry on the horizontal axis. The curve is piecewise-linear with a single kink at the strike price. Where the curve is above zero (green region), your position is profitable; where it is below zero (red region), you are losing money. The point where the curve crosses zero is the break-even. The strike price is marked with a vertical reference line. This chart lets you see at a glance which expiry scenarios produce profit, which produce loss, and by how much.

This calculator handles single-leg positions only — one call or one put, either long or short. For multi-leg strategies such as bull call spreads, bear put spreads, iron condors, straddles, or strangles, you would add the individual legs separately and sum the P&Ls, or use a dedicated multi-leg options strategy calculator. The payoff diagram for a spread would show two kinks (one at each strike), which this single-leg tool does not generate.

The figures are gross — before commissions, brokerage, exchange and clearing fees, and taxes such as India’s securities transaction tax (STT) on options exercise. Your net P&L after costs will be lower than the number shown. The calculator deliberately keeps the math to pure intrinsic-value P&L so it works across markets and brokers; subtract your own per-contract cost estimate to get a net figure.