4 in binary

4 in binary is 100. In hexadecimal it is 4 and in octal 4.

4 in binary

Pick any whole number from 1 to 10,000.

4_{10} = 100_{2}

How to work it out

1
Divide 4 by 2 again and again, writing down the remainder each time, until you reach 0.
2
Read the remainders from the bottom up: 100.
$4_{10} = 100_{2}$
3
Check by adding powers of 2: 4 = 4.

LaTeX source of the formulas on this page

\[ 4_{10} = 100_{2} \]

What is 4 in binary?

100.

What is 4 in hexadecimal?

What is 4 in octal?

How many bits does 4 need?

3 bits.