Binary Calculator
Convert between binary, decimal, hexadecimal, and octal numbers. Perform binary arithmetic operations and number system conversions.
Number System Converter
Base 10 number system
Number System Information
Decimal (Base 10)
Uses digits 0-9. Most common number system in everyday life.
Binary (Base 2)
Uses digits 0-1. Used in computer systems and digital electronics.
Hexadecimal (Base 16)
Uses digits 0-9 and A-F. Common in programming and computer science.
Octal (Base 8)
Uses digits 0-7. Sometimes used in computing and digital systems.
About the Binary Calculator
Our free binary calculator converts between binary, decimal, hexadecimal, and octal, and performs addition and subtraction in binary. Use it for programming, computer science, and digital electronics. Enter a value in any base and convert to others, or perform binary arithmetic. For general maths try our basic calculator or scientific calculator.
You may also find our basic calculator and scientific calculator useful.
Frequently Asked Questions
What is binary?
Binary is base-2, using only digits 0 and 1. Computers store and process data in binary.
How do I convert decimal to binary?
Divide the number by 2 repeatedly and note the remainders (0 or 1). Read the remainders from bottom to top for the binary result. This calculator does it automatically.
What is hexadecimal used for?
Hexadecimal (base 16, digits 0-9 and A-F) is common in programming for colours, memory addresses, and compact representation of binary.