What the tool does, how to run it, and what to expect from the result.
Work out the profit or loss on a call or put option at expiration, bought or sold, with the breakeven price and the maximum profit and loss. The math updates instantly and runs on your device, so it is fast, private, and available offline.
A quick way to understand who this helps, what it solves, and where it connects next.
Shoppers, students, freelancers, and anyone who needs a quick, private calculation.
Fast everyday math without a spreadsheet, app install, or sign-up.
Short answers for the questions people usually have before trying a utility like this.
Yes. It is completely free, with no sign-up, no watermark, and no usage limits.
No. Amounts are currency-neutral and use the same unit across all inputs, so it works in any country.
At expiration a call is worth max(0, stock price − strike) per share. Profit = (that value − premium paid) × 100 shares per contract. A $100 call bought for $3.50 with the stock at $110 makes (10 − 3.50) × 100 = $650; breakeven is $103.50.
Selling a call obliges you to deliver shares at the strike however high the stock goes, so the loss grows without limit. Buying an option risks only the premium. This models the value at expiration only, not before it.
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Enter your numbers and the result updates live in your browser. Nothing is uploaded and no server is used.
Calculations run locally in your browser. Amounts are shown without a currency symbol so they work anywhere.