# Binary to decimal calculator for online use

### Steps to convert binary number 1001001 to decimal seek

Steps to convert binary number 1001001 to decimal seek:

Open your computer’s calculator. (Use the left button of the mouse to click on the start button, find the accessories in the program, in the accessories you can see the calculator, use the left button of the mouse to click on the calculator, the calculator will appear on the desktop of the computer.)

Find View in the top row on the calculator. Click on it with the left button of your mouse and click on Scientific in the box that pops up. This will open the scientific type calculator.

Tap on Solve Binary

In the box, type 1001001 (press 1001001 in order)

then click on Decimal, so that 73 will appear in the box.

73 is the number that 1001001 will be converted to decimal.

### How to convert binary to decimal with a calculator

Toggle mode, 4: BASE-N.

Press BIN (which corresponds to log) to go to binary, enter the number, press =, and then press DEC (which corresponds to x²) to convert to decimal.

Please note that different calculators have different keystrokes. Some calculators do not have this feature please use hand calculator.

### Write the calculation steps to convert the binary number 10010 to decimal

The binary number 10010 to decimal should be summed according to the weighted expansion, and the calculation steps are to write the binary number as a weighted coefficient expansion and then sum it according to the rules of addition of the decimal system: 10010 (2) = 1×2^4 + 0×2³ + 0×2² + 1×2¹ + 0×2º = 18 ( 10).

Checking, converting decimal 18 to binary:

Step 1, 18 ÷ 2 = 9 remainder 0

Step 2, 9 ÷ 2 = 4 remainder 1

Step 3, 4 ÷ 2 = 2 remainder 0

Step 4, 2 ÷ 2 = 1 remainder 0

Step 5, 1 ÷ 2 = 0 remainder 1

Order the remainders backwards to arrive at Binary number 10010, the check is correct, so the binary number is converted to decimal number 18.

Expanded

Binary to decimal conversion, before the decimal point, or the integer digits to the right to left with the binary number to multiply each number to the corresponding second power and increase, after the decimal point is the left to the right to multiply the corresponding negative second power and decrease.

For example, the binary number 1101.01 is converted to decimal

1101.01(2)=1×2º+0×2¹+1×2²+1×2³ +0×2^(-1)+1×2^(-2)=1+0+4+8+0+0.25=13.25(10)

So to summarize the general formula is:

abcd.efg(2)=d×2º+c×2¹+b×2²+a×2³+e×2^(-1)+f×2^(-2)+g×2^(-3) (10).