How much will my option's delta change if the stock moves, based on gamma?

How this is calculated

• Gamma measures how fast delta changes as the stock price moves. This estimate multiplies gamma by your move size, which is only accurate for small moves since gamma itself changes as price moves (convexity).
• Delta and gamma are typically quoted per share. This tool multiplies by 100 for a standard contract, then by your contract count for total position exposure.
• Calls generally carry positive gamma with delta between 0 and 1, and puts carry positive gamma with delta between -1 and 0. This tool only uses the sign you enter and does not infer option type.
• Broker-quoted greeks depend on the pricing model and inputs, such as volatility and time to expiration, used to calculate them, and can differ slightly between platforms.
• The estimated new delta is capped between -1 and 1, since delta cannot move past those bounds regardless of what the raw gamma math produces.