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Binary Calculator
Convert binary to decimal, decimal to binary, and perform binary arithmetic. Supports binary, octal, decimal, and hexadecimal conversions.
Enter a value in any field — all others update instantly.
Binary (Base 2)
Decimal (Base 10)
Hexadecimal (Base 16)
Octal (Base 8)
8-bit Representation
1
1
1
1
1
1
1
1
128
64
32
16
8
4
2
1
How to Use the Binary Calculator
Enter your values above for an instant result. This tool uses verified formulas and is optimised for users in USA, Canada, UK, Australia. All calculations happen in your browser — your data is never sent to our servers.
Frequently Asked Questions
How do you convert binary to decimal?
Multiply each bit by 2 raised to its position. Binary 1011 = 1×8 + 0×4 + 1×2 + 1×1 = 11 in decimal.