Options Profit Calculator
Estimate profit or loss at expiration for a single call or put option. Supports both long (buy) and short (sell) positions.
How this options profit calculator works
This tool calculates your estimated profit or loss at expiration for a single options leg. You can model a call or put, and either a long position (you bought the option) or short position (you sold the option). The output includes net P/L, break-even price, and maximum risk/reward profile where it is mathematically defined.
It is designed for quick scenario testing. Instead of manually redoing payoff formulas each time, you can adjust strike, premium, contracts, and expected stock price to see the impact instantly.
Core inputs you need
1) Position: Long vs. Short
A long option means you paid premium and own the contract. A short option means you collected premium and owe the payoff if assigned at expiration.
- Long call/put: limited loss (premium), variable upside depending on type.
- Short call/put: premium collected upfront, but obligation risk can be significant.
2) Option Type: Call vs. Put
- Call: gains value when the underlying rises above strike.
- Put: gains value when the underlying falls below strike.
3) Strike, Premium, Contracts, and Expiration Price
These four variables define the terminal payoff. Premium is entered on a per-share basis, and the calculator multiplies by 100 shares per contract.
Payoff formulas used
The calculator uses standard expiration payoff math:
- Call intrinsic value: max(0, Stock Price - Strike)
- Put intrinsic value: max(0, Strike - Stock Price)
- Long option profit/share: Intrinsic Value - Premium
- Short option profit/share: Premium - Intrinsic Value
Total P/L is then:
- Total Profit/Loss: Profit per Share × 100 × Number of Contracts
Understanding break-even, max profit, and max loss
Break-even
- Call break-even: Strike + Premium
- Put break-even: Strike - Premium
Maximums by strategy
- Long Call: Max loss = premium paid; max profit = theoretically unlimited.
- Short Call: Max profit = premium received; max loss = theoretically unlimited.
- Long Put: Max loss = premium paid; max profit occurs if stock goes to zero.
- Short Put: Max profit = premium received; max loss if stock falls to zero.
Practical example
Suppose you buy 2 call contracts with a $100 strike for a $4.00 premium. If the stock closes at $112 at expiration, intrinsic value is $12 per share. Your profit per share is $12 - $4 = $8. Total profit is $8 × 100 × 2 = $1,600.
If the stock instead closes at $98, intrinsic value is $0 and your loss is the full premium: $4 × 100 × 2 = $800.
Common mistakes to avoid
- Forgetting that options are quoted per share, but contracts represent 100 shares.
- Confusing premium paid with total trade cost for multiple contracts.
- Ignoring assignment risk on short positions.
- Using expiration payoff as if it were live mark-to-market P/L before expiration.
Tips for better scenario analysis
- Run multiple stock price outcomes (bear, base, bull).
- Compare reward-to-risk for each strategy before entering.
- Use break-even as a minimum directional target, not as a guarantee.
- Pair this calculator with probability, volatility, and time-decay analysis for full decision quality.
Important note
This calculator is educational and models expiration payoff only. Real-world options trading includes liquidity constraints, implied volatility changes, early assignment possibilities, commissions, and tax effects. Always validate trades against your broker platform and risk plan.