What is cost to update iPad 11

There is no charge for an iPad operating system update. However not all iPads can be updated to the latest system. If you use the following instructions and it tells you that your iPad is up to date, that indicates that it cannot be updated to a higher version due to its age. Update your iPhone, iPad, or iPod touch - Apple Support

Whether you are able to update your iPad to a newer version of iOS/iPadOS will be dictated by your iPad model - and the currently installed version of iOS. You can find this information here:

Settings > General > About

Not sure which iPad you have? Identify your iPad model.

Here is a list of the highest version of iOS supported by the older models of iPad (for simplicity - “generations” are shortened to a number) that are restricted in their ability to be updated:

iPad1 - iOS 5.1.1

iPad2, iPad3 and iPad mini1 - iOS 9.3.5 (WiFi Only models), iOS 9.3.6 (WiFi & Cellular)

iPad4 - iOS 10.3.3 (WiFi Only), iOS 10.3.4 (WiFi & Cellular)

iPad Air1, iPad mini2 and iPad mini3 - iOS 12.4.9

Newer models, not appearing in this list, are all able to be updated to the current version, iPadOS 14.2.