Calculator

You can perform arithmetic calculations with a basic calculator in the Calculator app, and Siri can do the math for you, too, like 18 percent of 225.

You can clear digits, numbers, or the display, delete the entire number you last entered, copy a calculation result, and repeat the last operation. If you need more, you can switch to another mode to access algebraic, exponential, logarithmic, and trigonometric keys, or instantly calculate unit or currency conversions.

Siri: Ask Siri something like, “What’s 18 percent of 225?”

Switch to the basic calculator

1. Start the Calculator app on your iPhone.
2. Tap the Change Mode button and then tap Basic.

Clear digits, numbers, or the display

1. Start the Calculator app on your iPhone.
2. Enter a digit or calculation.
3. Do one of the following:
   • Delete the last digit: If you make a mistake when you enter a number, tap the Delete key.
   • Delete the entire number you last entered: Tap the Clear (C) key.
   • Delete the expression: Tap the All Clear (AC) key, or touch and hold the Delete key or the Clear (C) key.

Clear digits, numbers, or the display

1. Start the Calculator app on your iPhone.
2. Enter a digit or calculation.
3. Do one of the following:
   • Delete the last digit: If you make a mistake when you enter a number, tap the Delete key.
   • Delete the entire number you last entered: Tap the Clear (C) key.
   • Delete the expression: Tap the All Clear (AC) key, or touch and hold the Delete key or the Clear (C) key.

Switch to another mode

1. Start the Calculator app on your iPhone.
2. Tap the Change Mode button. Do one of the following:
   • Access algebraic, exponential, logarithmic, and trigonometric keys, and more: Tap Scientific.
   • Solve handwritten math problems, evaluate expressions, and assign variables: Tap Math Notes and then tap the New Note button.
   • Draw graphs: Tap Math Notes, tap the New Note button, write an equation, then tap Insert Graph.
   • Instantly calculate unit or currency conversions: Tap Convert.

Note: For written math and variable names, Calculator uses select numeric systems.

Copy a calculation result

1. Start the Calculator app on your iPhone.
2. Enter a calculation, touch and hold the calculation result in the display, and tap Copy.
3. Paste the result somewhere else, such as in a note or message.

You can also copy previous calculations.

Repeat the last operation

After you complete an operation, you can do one of the following:

• Apply the last operation to the current result: Tap the equal sign.

  For example, if you enter “1 × 2 =”, your result is 2. Each time you tap the equal sign, the currently displayed answer is multiplied by 2, producing these results: 4, 8, 16, 32, and so on.

• Apply the last operation to a new number: Enter a new number, then tap the equal sign.

  For example, if you enter “100 + 15% =”, the result is 115. Then, if you enter “150 =”, the result is 150 + 15%, or 172.5.

You can use the scientific calculator for exponential, logarithmic, and trigonometric functions. You can also view complete expressions with parentheses, trigonometry, and multiple operations before you get the final answer.

You can work with stored values, use trigonometric and hyperbolic functions, choose radians or degrees, and use mathematical constants. You can even generate a random number between 0 and 1. It follows the standard order of operations, too, so multiplication is completed before addition and subtraction.

Note: The Calculator app uses the standard order of operations. For example, multiplication is completed before addition and subtraction. Add parentheses around expressions that you want calculated first.

Switch to the scientific calculator

1. Open the Calculator app on your iPhone.
2. Tap the Change Mode button and tap Scientific.

Work with stored values

1. Open the Calculator app on your iPhone.
2. Tap the Change Mode button and tap Scientific.
3. As you calculate, you can do any of the following:
   • Add the value on the screen to memory: Tap m+.
   • Subtract the value on the screen from memory: Tap m-.
   • Recall the stored value in memory: Tap mr.
   • Clear the stored value from memory: Tap mc.

Use exponential and logarithmic functions or notation

1. Open the Calculator app on your iPhone.
2. Tap the Change Mode button and tap Scientific.
3. Do any of the following:
   • Square a value: Enter a number and tap x2. Then tap =.
   • Cube a value: Enter a number, tap x3, and tap =.
   • Raise a value to the power of y: Enter a base number, tap xy and enter the value of y. Then tap =.
   • Raise e to the power of x: Enter the value of x, tap ex, and then tap =.
   • Raise 10 to the power of x: Enter the value of x, tap 10x then tap =.
   • Calculate a factorial: Enter a number and tap x!. Tap =.
   • Calculate a reciprocal: Enter a number, tap 1/x, and tap =.

Quick tip: Instead of tapping the × and 10x keys, tap EE as a shortcut for scientific notation.

Use the keys just below those keys to get the inverse functions: the square root, cube root, yth root, natural logarithm, and logarithm.

To access additional functions (such as yx or powers of 2), tap the “2nd” key near the left.

Use trigonometric and hyperbolic functions

1. Open the Calculator app on your iPhone.
2. Tap the Change Mode button and tap Scientific.
3. Find any of the following:
   • Sine: Tap sin and enter a number. Tap =.
   • Cosine: Tap cos, enter a number, and then tap =.
   • Tangent: Tap tan and enter a number. Then tap =.
   • Hyperbolic sine: Tap sinh, enter a number, and then tap =.
   • Hyperbolic cosine: Tap cosh, enter a number, and tap =.
   • Hyperbolic tangent: Tap tanh, enter a number, and then tap =.

To access the inverse of these functions (such as arcsine or arctangent), tap the “2nd” key near the left.

Use radians or degrees

The scientific calculator uses degrees by default.

1. Open the Calculator app on your iPhone.
2. Tap the Change Mode button and tap Scientific.
3. Tap Rad to switch to radians.

When you’re using radians instead of degrees, the label Rad appears, and the Rad key becomes Deg.

To switch back to degrees, tap the Deg key.

In portrait orientation (with your iPhone held vertically), you’ll find the Rad/Deg key just above the ÷ key. In landscape orientation (held horizontally), it’s near the bottom center.

Use mathematical constants

1. Open the Calculator app on your iPhone.
2. Tap the Change Mode button and tap Scientific.
3. Do any of the following:
   • Insert pi: Tap π.
   • Insert Euler’s number: Tap ℯ.

Generate a random number between 0 and 1

1. Open the Calculator app on your iPhone.
2. Tap the Change Mode button and tap Scientific.
3. Tap Rand.

Hold your iPhone vertically (in portrait orientation), and the Rand key sits just above the Delete key. Turn it horizontally (in landscape orientation), and the Rand key is in the bottom left.

You can convert length, weight, currencies, and more while using the basic or scientific calculator. You just choose which units or currencies you want to convert from and to. Conversions appear as you type, with categories like Speed, Time, and Weight, and you can also convert units and currencies in Math Notes.

1. Open the Calculator app on your iPhone.
2. While using the basic or scientific calculator, tap the Change Mode button. Tap Convert.
3. Tap the Unit button and choose the units or currencies you want to convert from and to.

   Swipe the categories at the top of the list to see others, such as Speed, Time, and Weight.

4. Enter a value in either field to see conversions as you type.
5. To reverse how the units are converted, tap the Swap Units button.

In Math Notes, you can also convert units and currencies. Type or write “50 m in feet =” in a note, for example.