Question 1

How do I convert decimal to binary?

Accepted Answer

To convert a decimal number to binary, repeatedly divide the number by 2 and record the remainders from bottom to top. For example, 13 in decimal is 1101 in binary. This tool does the conversion instantly — just type the decimal value.

Question 2

How do I convert hexadecimal to decimal?

Accepted Answer

To convert hex to decimal, multiply each hex digit by 16 raised to its positional power and sum the results. For example, 0x1F = (1×16) + (15×1) = 31 in decimal. Enter the hex value in this tool for an instant result.

Question 3

What is the difference between binary, octal, decimal, and hex?

Accepted Answer

Binary (base 2) uses digits 0–1. Octal (base 8) uses 0–7. Decimal (base 10) is the everyday number system using 0–9. Hexadecimal (base 16) uses 0–9 and A–F. Each is a positional numeral system; they differ only in the base (radix) used.

Question 4

How do computers use binary numbers?

Accepted Answer

Computers store all data as binary digits (bits) because electronic circuits have two stable states: on (1) and off (0). Every number, character, image, and instruction is ultimately represented as a sequence of bits in memory and on disk.

Question 5

What is hexadecimal used for in programming?

Accepted Answer

Hexadecimal is used in programming for memory addresses, color codes (e.g., #FF5733), bitmasks, and representing binary data compactly. One hex digit represents exactly 4 bits, so it is a convenient shorthand for binary.

Number Base Converter

Enter a number in any base

Bitwise Operations

Quick Examples

Base Reference

Related Tools

Dec	Bin	Oct	Hex
0	0	0	0
1	1	1	1
2	10	2	2
3	11	3	3
4	100	4	4
5	101	5	5
6	110	6	6
7	111	7	7
8	1000	10	8
9	1001	11	9
10	1010	12	A
11	1011	13	B
12	1100	14	C
13	1101	15	D
14	1110	16	E
15	1111	17	F