Your iPhone’s Messages App Can Function Like A Calculator. Here’s How

Math equations aren’t everyone’s strong suit, and that’s all right. With this iOS 18 trick, you don’t have to open your Calculator app to solve tricky equations, and you won’t have to open Google to look up a conversion rate, either. Instead, you can just use your Messages app.

Prior to iOS 18, if you wanted to figure out how to split a bill with your texting group from afar, you’d have to use your calculator app or Spotlight and then switch back to Messages. With iOS 18 you can perform multistep calculations in Messages — as well as convert things like currency and temperature — without switching apps.

Read more: iOS 18 Brings These New Features to Your iPhone

Here’s how to make Messages perform calculations.

How to solve math problems in Messages

In order to solve a math equation in Messages, type the problem into your text field, add the equals sign (=) and the solution will appear in the predictive text field over your keyboard. Tap the solution to add it to your text. 

Messages can solve simple equations — like “2+2=” — by typing them into the text field. The app can also solve equations that use more complex formulas, like the trigonometric functions of sine, cosine and tangent. You need to include the equals sign (=) at the end no matter what.

How to convert values in Messages

Converting values in Messages works similar to solving math problems in the app. Type the value into your text box with the appropriate value marker — like F for Fahrenheit or lbs for pounds — and then type the equal sign (=), and the predictive text field above your keyboard will show you the conversion. 

If you don’t indicate what to convert to, predictive text will choose what to convert to. Don’t worry — it won’t try to convert pounds to minutes. Messages will show conversions to other similar units, so Fahrenheit will convert to Celsius and pounds will convert to kilograms. 

You can choose what to convert to by typing something like “60hr to min=” and Messages will display the conversion in the predictive text field — that’s 3,900 minutes.

For more on iOS 18, here’s what you need to know about iOS 18.3.1 and iOS 18.3. You can also check out our iOS 18 cheat sheet.

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