With our online math calculator you will be able to perform not only simple arithmetic calculations and perform basic commands
but also calculate the square root, work with trigonometric functions, perform scientific calculations, raise a number to a power, etc.

You can enter commands for the calculator both with a mouse and using the computer keyboard.
Please, see below detailed instructions for using the free online calculator.

## Instructions for using the online calculator

### Keys function

[ 0 ], [ 1 ], [ 2 ], ... [ 9 ] - standard number keys;

[ 00 ] - key input 2 zeros;

[ → ] - remove the last character on the display;

[ +/- ] - change the mathematical sign of;

[ Xʸ ] - calculation of X to the power of Y;

[ √ ] - calculate the square root;

[ + ] - addition, [ - ] - subtraction, [ х ] - multiplication, [ ÷ ] - division;

[ % ] - calculate interest;

[ M+ ] - stored in the memory with the sign [ + ];

[ M- ] - stored in the memory with the sign [ - ];

[ MR ] - get the contents of memory;

[ MC ] - get the contents of memory;

[ AC ] - reset the last digit of the;

[ C ] - reset the last digit of the.

### Examples of calculations on the online calculator

Calculate the square root of 529: 529 [ √ ] . Result - 23.

Raise the number 3 to a power 4: 3 [ Xʸ ] 4 . Result - 81.

Calculation of percentage of the number of: 500 [ х ] 25 [ % ] . Result - 125.

Adding percentage to the number: 500 [ + ] 25 [ % ] . Result - 625.

Deduction percentage of the number : 500 [ - ] 25 [ % ] . Result - 375.

### Enter commands from the keyboard PC

To use free online calculator you can use both ordinary numeric buttons at the top of
a keyboard and numeric buttons on the right of a keyboard.

To enter [ = ] - key [Enter].

To erase the last character - [Backspace] (arrow keys).

To enter [ + ] - key [ + ] at the top or [ + ] key on the numeric keypad on the right.

To enter [ - ] - key [ - ] at the top or [ - ] key on the right.

To enter [ x ] (multiplication) - key [ * ] on the numeric keypad on the right or a combination of keys[ * ] and [ Shift ].

To enter [ ÷ ] (divide) - key [ / ] on the numeric keypad on the right or a combination of keys [ : ] and [ Shift ].

### Frequently asked questions about the calculator

Why do we get 8 when trying to calculate 2+2x2 with a calculator?

Calculator performs mathematical operations in accordance with the order they are entered. You can see the current math calculations in a smaller display that is below
the main display of the calculator.

Calculations order for this given example is the following:

2+2=4, subtotal - 4. Then 4x2=8, the answer is 8.