If you own an iPhone, you have Apple’s Calculator app on your phone for doing calculations. On opening the Calculator app, you will see a normal calculator app. What if you want a scientific calculator? Many people install a third-party scientific calculator app for doing advanced calculations. But very few people know that Apple has been hiding a scientific calculator in its Calculator app for years. In this article, I will explain how to open a scientific calculator on an iPhone.
First of all, open the Calculator app. You can use App Library to search and open the Calculator app. Now when the app is open, you will see the simple calculator app.

To enter scientific calculator mode, rotate your iPhone 90 degrees to landscape orientation. The app will change into a scientific calculator automatically.
If it doesn’t, disable the orientation lock. For this, open the Control Centre and tap the orientation lock icon to disable the orientation lock.

Now open the Calculator app again and rotate the phone to landscape orientation. It should switch to the Scientific calculator.

Now you know how to open the Scientific calculator on the iPhone. Next time when you need a Scientific calculator, use the default calculator app instead of downloading a third-party app.