Use "Calculator" to perform basic calculations, advanced calculations, or programmer calculations. If your Mac is equipped with a touch bar, you can calculate easily and quickly, without even moving the pointer.
Change calculator
In the "Calculator" app on your Mac 
, choose an option from the "View" menu:
Basic: Perform simple arithmetic operations.
Scientific: Use the cache function and perform advanced operations involving fractions, powers, square roots, exponents, logarithms, trigonometric functions, etc.
Programmer: Perform binary calculations, octal calculations, decimal calculations, and hexadecimal calculations, including bit-by-bit calculations. You can also view the ASCII characters and Unicode characters represented by the current value.
Conversion value
In the "Calculator" app on your Mac , enter the original value, choose "Convert" in the menu bar, and then choose a category, such as "Temperature" or "Currency."
[Note] You must be connected to the Internet to get the latest currency exchange rates.
Round the result
In the Calculator app on your Mac , choose View> Decimal Places, then choose the number of decimal places to display. The calculator will store the complete value and display the rounded value. If the displayed value has fewer decimal places than you specified, then the undisplayed decimal places are zero.
Enter complex equations using Reverse Polish Notation (RPN)
In the Calculator app on your Mac , choose View> RPN Mode. The stack is displayed on the display of the "Calculator", the equal sign key (=) will become the Enter key, and four keys will appear so that you can process the numbers on the stack.
Do one of the following:
Swap the following two numbers on the stack: Click the "Swap Register" button 
.
Move the most recently entered number up or down on the stack: Tap the "Scroll up" key 
or the "Scroll down" key 
.
Delete the bottom number from the stack: Click the "Discard" button.
Correct unexpected results
In the "Calculator" app on your Mac , do any of the following:
- If the result does not contain a decimal point: Choose "Display"> "Basic" or "Display"> "Scientific", because the programmer calculator will truncate all numbers after the decimal point. For example, if you enter "99 / 10 =", the result will be 9. Use a basic calculator or a scientific calculator to get more accurate results.
- Choose "Display"> "Decimal Places" (in any type of calculator), because the number of decimal places may not be set correctly and the calculator has rounded the result. For example, if you set the number of decimal places to zero and enter 99/10 =, the result will be 10.
- If you are not sure whether you entered the formula correctly, use "Record" (choose "Window"> "Show Record") to view what you entered.
- If you want to display the comma separator, choose View> Show Thousand Separator to display commas in larger numbers.
Use keyboard shortcuts
In the "Calculator" app on your Mac
, use keyboard shortcuts to quickly enter calculations; the shortcut keys vary depending on the type of calculator you are using.
The above is a list of tutorials and shortcuts for Mac calculators brought to you by the editor. I hope it will be helpful to you. If you want to know more about Mac-related content, please follow macz.com!