How to Use the Options Profit Calculator

Open the calculator. On a computer, the inputs are to the left of the graph. On a phone, they are below it; scroll inside that panel to see the results.

Let’s try buying one call option with a $105 strike when the stock is $100. The graph will show what happens if the stock rises or falls.

1. Enter the position

Under Position, choose Long Call. This means buying a call option.
Set Entry price to 100. This is the stock’s price when you open the position.
In the option row, set Qty to 1 and Strike to 105. The strike is the price at which the call gives you the right to buy shares.
Open Expiration and choose an available date about a month from today.

Leave Implied volatility, Risk-free rate and Dividend yield at their starting settings for this first example. The calculator uses them to estimate the option’s price.

You can leave Ticker alone. It labels the scenario; entering a symbol does not fetch a stock quote.

2. Find the cost and break-even

The option row’s Model price is the estimated premium for one share. Look below the row for Modeled entry debit: the estimated cost of buying the whole contract, which represents 100 shares.

For this one-call example:

Maximum loss is that opening debit: what you lose if the call expires worthless.
Break-even point is the stock price needed at expiration to recover the opening cost. It is the $105 strike plus the premium per share.
Maximum profit is unlimited in the model because the stock price has no upper limit. That does not mean a profit is guaranteed.

3. Read profit or loss on the graph

Set X-axis to Stock price and the selector on the graph to Profit / loss. Move Analysis date all the way to the right, to expiration.

The bottom axis shows possible stock prices. The vertical axis shows your position’s profit or loss in dollars. Above zero is a profit; below zero is a loss.

Move your mouse over the graph to read a value. On a phone, touch the curve and slide your finger along it.

Find $110 on the stock-price axis. At expiration, the $105 call is worth $5 per share, or $500 for one contract. Your profit is that $500 minus the opening debit shown in the summary. At $105 or below, the call expires worthless and you lose the opening debit.

4. See what changes before expiration

Move Analysis date to the left to choose an earlier date. Read the graph at $110 again. The option still has time remaining, so its modeled value can differ from its expiration value. The opening cost stays the same while you move this date slider.

Keep Entry price at $100 during this comparison. Explore other possible stock prices on the graph. Changing Entry price would recalculate the position’s starting cost.

Try your own position

Once that example makes sense, replace the entry price, strike, quantity and expiration with the scenario you want to explore.

Choose a different Position for a put or a spread. Use + Add leg to build a custom position; Show legs displays the individual option curves. All legs share one expiration.
Adjust Implied volatility, Risk-free rate or Dividend yield to explore different pricing assumptions. These edits recalculate the opening cost as well as the graph.
Expand Greeks for the position’s sensitivities at today’s date and the Entry price. The Greeks guide explains those numbers.
Use the zoom buttons or drag empty graph space to change the view. Reset restores the graph’s framing.

For other graph views and percentage comparisons, see calculator methodology and profit versus return.

Before using the results

The premiums are model estimates, not live quotes. There is no field for the premium you actually paid, so this calculator cannot reproduce an existing trade’s exact profit or loss. The displayed results exclude fees and taxes; exercise, assignment and margin risks also matter in a real trade.