How do I delete one number in the iPhone calculator?

We have a tip on how to delete one number in the iPhone Calculator ; it's easy! All you have to do is swipe left across the numbers you've typed in. Each swipe deletes one number.

How do I check my Calculator history on my iPhone?

We have an article on this topic, but the short answer is that you can only see your Calculator history in the ap p if your iPhone is updated to iOS 18 or later.

How do I use the scientific calculator on my iPhone?

The scientific calculator on your iPhone appears once you tap the Calculator icon, then Scientific. Here's more on the iPhone scientific calculator .

All About the iOS 18 Calculator on Your iPhone

By Leanne Hays Wed, 01/08/2025

What to Know

Apple has added several improved and new features to the iOS 18 Calculator.
You can now see your iPhone Calculator history, use Math Notes, do conversions, and enjoy an improved scientific calculator.

The Apple Calculator for the iPhone has new features! Here's everything you need to know about the iOS 18 calculator, including how to use Apple Math Notes, how to convert distance and currency, how to use iPhone calculator history, updates to the Scientific Calculator, and more.

How to Use Math Notes in the iPhone Calculator App

Apple now lets the Calculator app users graph equations, create and use variables, and solve mathematical expressions with Math Notes. Here's how to use Math Notes on your iPhone!

Note: Math Notes uses the same operations as your iPhone's scientific calculator.

To solve expressions:

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Open the Calculator app on your iPhone.
Tap the Calculator icon.

Tap Math Notes.
If it's your first time using Math Notes, you'll see a summary to read. Read it, then tap Continue.

Tap a previous Math Note or the New Note icon to begin your Math Note.
Now you can type a math expression, then tap the space bar, and an equal sign and the answer will appear.

Tap the Pencil icon and write a math expression horizontally with your finger, then write an equal sign. An answer will automatically appear.
Tap the equal sign to get an answer, and tap Copy to copy the expression, or Remove Result to delete the expression from Math Notes.

Tap the Pencil icon and write a math expression vertically with your finger, then draw a horizontal line underneath. Write a different symbol to the left of each number to change operations.
As before, you can tap the answer to see the typed-out equation and open the options to copy or remove the result.

Note: A dotted red line indicates an error involving unsolvable expressions and unrecognized math. Tap the red line for more details.

A blue dotted line indicates ambiguous characters. You can tap the blue lines to rewrite what you wrote.

In addition to solving mathematical expressions, you can change or update values in those expressions, use variables in equations and expressions, and decide if you want your iPhone to solve problems, suggest results, or neither.

How to Use iPhone Calculator Conversion

Another great iOS 18 calculator update is the ability to convert currencies, length, weight, and more using the basic or scientific calculator. It's easy to convert currency or units with your iPhone calculator; no unit converter app needed!

Read on to learn about more iOS 18 calculator features.

How to Find Your iPhone Calculator History

There used to be no way to see your iPhone Calculator history, except to use a third-party app. But the iOS 18 Calculator app has fixed that! Here's how to see Calculator history on your iPhone.

Open the Calculator app on your iPhone.
Tap the Calculator icon.

Tap Basic or Scientific, depending on which calculator's history you want to search.
Tap the Menu icon.

Tap a calculation to resume working on it.
Touch and hold the calculation to choose Copy Expression or Copy Result.

Read on to learn about improvements to the iPhone scientific calculator!

How to Use the iPhone Scientific Calculator

You don't need a scientific calculator app; we'll show you how to get the scientific calculator on iPhone, plus all the functions and notations it can do.

Open the Calculator app on your iPhone.
Tap the Calculator icon.

Tap Scientific.
Work with stored values by tapping m+ to add the value on screen to memory

Use exponential and logarithmic notation or functions. For example, enter a number, tap x2, then = to square the value.
Use trigonometric and hyperbolic functions, including Sine, Cosine, and Tangent. For example, tap sin, enter a number, then tap =.

Use radians or degrees; tap Rad to switch to radians, tap Deg to change back to degrees.
Finally, you can use your iPhone calculator as a random number generator from zero to one; just tap Rand.

Now you know about all the new iOS 18 Calculator features on your iPhone Calculator app! Be sure to check out our free Tip of the Day for more great iPhone Calculator tutorials.

FAQ

How do I delete one number in the iPhone calculator? We have a tip on how to delete one number in the iPhone Calculator; it's easy! All you have to do is swipe left across the numbers you've typed in. Each swipe deletes one number.
How do I check my Calculator history on my iPhone? We have an article on this topic, but the short answer is that you can only see your Calculator history in the app if your iPhone is updated to iOS 18 or later.
How do I use the scientific calculator on my iPhone? The scientific calculator on your iPhone appears once you tap the Calculator icon, then Scientific. Here's more on the iPhone scientific calculator.

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