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Long Call and Put Expiration Profit

Estimate expiration profit, premium paid, percentage return and break-even for standard 100-share long options.

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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Use the result with context

Results are estimates for planning and education. Confirm rates, taxes, fees, and legal requirements with the relevant institution or a qualified professional before making a financial decision.

Formula and method

At an underlying price of 90 and strike of 100, two long call contracts bought for a premium of 5 per share lose the 1,000 premium at expiration.

Call profit = (max(S−K,0)−call premium)×100×contracts; put profit = (max(K−S,0)−put premium)×100×contracts.

Worked example

Enter these known values and leave the other values blank.

Current asset price or target price
90 USD
Strike price
100 USD
Price of the call option
5 USD
Number of option contracts
2
Total call cost (premium)
1000 USD

Assumptions and limitations

  • Model one long call or put held to expiration, with 100 shares per contract and no commissions or early exercise. It does not price the option before expiration.
  • The signed price-gap fields remain editable for classifications. Profit clamps intrinsic payoff at zero, limiting a long position loss to its premium. Inverting a zero intrinsic payoff cannot uniquely recover a price gap.
  • Use one currency throughout. Retained currency selector factors are a historical snapshot, not live exchange rates.
  • Clear an editable unknown before solving an inverse. Selection controls and forced outputs cannot be inferred.

Common questions

What does this model assume?

Model one long call or put held to expiration, with 100 shares per contract and no commissions or early exercise. It does not price the option before expiration.

Can I use the currency menu as a current quote?

No. Keep amounts in one currency; conversion factors are a captured historical snapshot.

References

The calculation follows this reviewed mathematical model: Call profit = (max(S−K,0)−call premium)×100×contracts; put profit = (max(K−S,0)−put premium)×100×contracts. Required model inputs: Use a positive whole contract count. Call premium must be positive to calculate percentage return. Put premium must be positive to calculate percentage return.

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