Number base converter
Enter your numbers — the results update instantly.
Binary11111111
Octal377
Decimal255
HexadecimalFF
Worked example
Given: Number = 255; From base = 10 (decimal)
Result: Binary = 11111111; Octal = 377; Decimal = 255; Hexadecimal = FF
How it is calculated
1. Enter the values you know. 2. The calculator converts them to base units and applies the formula. 3. The result is shown in the unit you choose.
Frequently asked questions
How do I calculate it?
Given: Number = 255; From base = 10 (decimal). Result: Binary = 11111111; Octal = 377; Decimal = 255; Hexadecimal = FF.
Is the calculator free and private?
Yes. It is free, needs no sign-up and runs in your browser — the numbers you type stay on your device.