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# Options profit calculator

> Calculate payoff, maximum profit, maximum loss and break-even at expiry for calls, puts and common spreads from your strikes and premiums.

Work out the payoff at expiry, the maximum profit and loss and the break-even for a single option or a common spread, from your strikes, your premiums and how many contracts you hold.

## How the numbers are worked out

Every input is yours: the strategy, its strikes, the premiums, the contract count and the underlying price you expect at expiry. Nothing is fetched from an exchange. Each contract covers 100 shares. A call's intrinsic value at expiry is max(S − K, 0); a put's is max(K − S, 0), where K is the strike and S the underlying price. A leg's contribution is side × (intrinsic − premium) × 100 × contracts: a long leg pays its premium, a short leg collects it. The payoff at expiry adds every leg at your expiry price. Maximum profit and loss come from the payoff across every possible expiry price: the calculator evaluates the payoff at each strike and at zero, and where it keeps rising or falling past the last strike it reports Unlimited. Break-evens are the expiry prices where the payoff is exactly zero.

If a spread costs more than its best payoff, the maximum profit is a loss, and the calculator words it as one. Commissions and fees are not included.

## Build this as your own app

Give Younna the spreads you hold in your options book, with their strikes, premiums and contracts. It builds a personal app that redraws each position's payoff as the underlying moves and tells you when one nears its break-even or its maximum loss.

Younna never places trades.

[See an example app on the home page →](https://younna.ai/#how-it-works)