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Tom’s Guide
Tom’s Guide
Technology
Kaycee Hill

Your iPhone keyboard can do math — here's how to use the secret calculator

IPhone 16 Pro shown held in hand.

You're at dinner, the bill arrives, and someone inevitably says: "so what do we each owe?" Cue the awkward phone shuffling — someone opens the calculator, someone else does it on the notes app, your friend is just guessing. It's a whole thing. But what if you never had to leave your keyboard?

Since iOS 18, your iPhone has had this quietly powerful feature built right into the keyboard, meaning you no longer have to switch between apps for calculations. It works anywhere you type, and almost nobody knows it's there. Here's how to use it.

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