Binary Calculator
Convert between binary, decimal, hex, and octal number systems. Also add and subtract binary numbers. Shows all 4 number systems simultaneously. Free.
Binary Calculator
toolznova.com • Free Calculator
How to Use
Convert number systems in 3 steps.
Choose Mode
Select conversion or binary addition/subtraction.
Enter Number
Enter the number in your selected number system.
See All 4
Click Calculate to see number in all 4 systems.
Why ToolzNova?
Instant
Results in milliseconds.
Accurate
Precise formulas every time.
Private
No data sent anywhere.
Everywhere
Mobile, tablet, desktop.
Why Use Binary Calculator?
- Computer Science: All digital computing uses binary (base 2).
- Programming: Bitwise operations require binary understanding.
- Networking: IP addresses and subnet masks use binary.
- Electronics: Digital circuits operate on binary signals.
- Memory: File sizes and RAM measured in binary units.
- Hex Colors: #FF5733 web colors are hexadecimal.
Tips & Examples
- Decimal 255 = Binary 11111111 = Hex FF = Octal 377.
- 8 binary bits = 1 byte = values 0 to 255.
- Powers of 2: 1,2,4,8,16,32,64,128,256 — memorize these.
- Binary addition: 1+1=10 (carry 1 to next position).
- Hex is compact: each hex digit = 4 binary bits.
- Octal used in Unix permissions (chmod 755).
Free Binary Calculator Online
ToolzNova's free binary calculator converts between binary, decimal, hexadecimal, and octal — showing all 4 simultaneously. Also performs binary addition and subtraction.
Number systems are fundamental to computing. Binary is the native language of computers. Hex provides compact representation. Octal is used in Unix file permissions.
Number Systems
Binary (base 2): 0,1. Decimal (base 10): 0-9. Hexadecimal (base 16): 0-9 and A-F. Octal (base 8): 0-7. Convert any to decimal first, then to target base.