What is max pain in options?

Max pain (also called the options pain point) is the strike price at which the total dollar value of in-the-money options — both calls and puts — is minimized at expiration. The theory is that the underlying tends to close near this price, causing the most options to expire worthless.

How is max pain calculated?

For each candidate strike, multiply the open interest of every call above that strike by (strike price − candidate price), and every put below by (candidate price − strike price). Sum both. The candidate with the lowest total is the max pain price.

Where do I get open interest data?

Open interest by strike is available from your broker's options chain, from Yahoo Finance's Options tab, or from sites like Barchart, Market Chameleon, or CBOE.

Is max pain a reliable trading signal?

Max pain is a theoretical concept, not a guaranteed price target. It works best on high-OI underlyings (indexes, large-cap ETFs) close to expiration. Many traders use it as one data point among others, not as a sole directional signal.

What units should I use for open interest?

Enter the raw open interest contract count (e.g. 1500, not 1,500,000). The tool treats each contract as representing 100 shares, so dollar values are scaled accordingly. You can also enter OI in hundreds (each unit = 1 contract × 100 shares).

Max Pain Calculator

Name: Max Pain Calculator
Availability: InStock
Author: Nham Vu

Enter open interest for calls and puts at each strike to find the max pain price where the total ITM dollar value is lowest.

Open Interest by Strike

Strike

Call OI

Put OI

Max Pain Result

Add at least 2 strike rows to calculate max pain.

ITM Value by Strike

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Strike	Call OI	Put OI	Call Pain	Put Pain	Total

Summary

Enter open interest for calls and puts at each strike to find the max pain price where the total ITM dollar value is lowest.

How it works

Add each strike price and its call and put open interest using the row inputs.
The calculator sums the total in-the-money dollar value at every strike you entered.
For each candidate strike it computes: (sum of call OI × max(0, candidate − strike)) + (sum of put OI × max(0, strike − candidate)).
The strike with the lowest total ITM dollar value is the max pain price.
Results update live as you edit any field.

Use cases

Estimate where a stock may gravitate as options expiry approaches.
Supplement options strategy research before earnings or OPEX.
Teach yourself how open interest distribution affects price gravity.
Compare max pain levels across different expiration dates.
Identify strikes with unusually large call or put open interest clusters.

Frequently Asked Questions

Last updated: 2026-07-24 · Reviewed by Nham Vu