• A built-in keyboard feature enables instant calculations and conversions without external apps
• An integrated function within text fields that displays results instantly while typing

Apple has included in iOS 18 a feature within the iPhone keyboard that allows users to perform calculations and unit conversions instantly inside apps, without needing to open the Calculator app or use external tools. However, this feature remains largely unknown to a wide range of users despite having been available for some time.

The feature works within text fields that rely on the on-screen keyboard, where users can enter simple or complex mathematical expressions, with results appearing directly in typing suggestions and optionally inserted into the text immediately.

It also includes the ability to perform instant unit conversions, such as temperature or length, directly within the same line of typing by entering the required formula, with results displayed automatically.

According to its operating mechanism, mathematical results and conversions are enabled through keyboard settings. However, usage reports indicate that many users have not noticed this addition or do not rely on it in their daily use.

Despite the passage of time since the launch of iOS 18, Apple’s keyboard continues to receive repeated feedback related to the overall typing experience, while this feature remains among the less widely used tools despite its usefulness in speeding up simple calculations.