Number Base Converter
Convert between binary (base 2), octal (base 8), decimal (base 10) and hexadecimal (base 16). Supports numbers of any size thanks to BigInt, with optional digit grouping for readability.
Group digits
Numbers of any size are supported (BigInt). Separate digits with spaces if you like.
Conversions
Enter a number to see all conversions.
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Frequently asked questions
How do I go from decimal to binary?+
Divide the number by 2 repeatedly and note the remainders from bottom to top. This tool does it instantly for any base.
What is hexadecimal?+
It's base 16: it uses digits 0-9 and letters A-F. Every 4 bits equal one hexadecimal digit, which is why it's common in programming.
What size does it support?+
There's no practical limit: it uses BigInt, so you can convert numbers with hundreds of digits.