Your iPhone’s iOS 18 Messages App Can Do Math and Conversions—Here’s How

Texting just got smarter with the iOS 18 Messages app, which now includes built-in math solving and unit conversion features. Instead of switching between Messages, Calculator, or Safari, users can now complete equations or convert units like temperature or currency right from the message box. This update offers a major convenience boost, especially for multitaskers or those coordinating plans in group chats. If you’ve updated to iOS 18 and want to try it out, here’s everything you need to know about using Messages as a mini math and conversion tool.

How to Solve Math with iOS 18 Messages App

The iOS 18 Messages app now interprets math expressions entered into the text field. To solve a problem, just type the equation—such as 8*12=—and your iPhone will display the answer in the predictive text bar above the keyboard. This even works for multistep problems and trigonometric functions like sine or cosine, making Messages far more than just a communication tool. It's important to include the equal sign at the end for the predictive result to appear, and tapping it inserts the answer into your message instantly.

Converting Units Using iOS 18 Messages App

Along with solving equations, the iOS 18 Messages app allows users to convert values on the fly. Want to switch from Fahrenheit to Celsius or pounds to kilograms? Type a value like 100F= and watch predictive text display the converted result. This works with temperatures, currencies, weights, and more. Even without specifying the target unit, iOS intelligently predicts the most likely conversion you’re after—making it ideal for fast answers in conversations or travel planning.

Why iOS 18 Messages App Is a Game Changer for Everyday Users

Apple’s addition of real-time calculations and conversions to the iOS 18 Messages app might seem small, but it's a powerful productivity tool. Whether you're splitting a bill, figuring out time zones, or converting a measurement for a recipe, doing it within Messages eliminates app-switching friction. These enhancements reflect Apple’s push toward seamless, context-aware computing—where your device anticipates what you need without interrupting your flow.