Practical tools for option sellers.

Use simple calculations to make obligations, capped upside and risk visible before you focus on premium.

Options Position Sizing Calculator

Estimate assignment notional, effective cash obligation and position size as a percentage of account value.

Calculate expiration break-even and separate premium received from the full stock purchase obligation.

Calculate premium yield, simplified break-even and maximum expiration profit if shares are called away.

Combine the stock result and call premium when shares are sold at the strike.

Calculate the percentage of premium captured and what remains.

Separate the old option result from the replacement option premium.