Hex Calculator
Hexadecimal to decimal, binary and octal.
Work out Hex. Hexadecimal to decimal, binary and octal. Shows the working, not just the answer.
Decimal
597
10 bits
Every base writes the same quantity differently — 597 is 1001010101 in binary and 255 in hex, and none is more correct than the others. Hexadecimal earns its place in computing because one hex digit is exactly four binary digits, so conversion between them needs no arithmetic at all.
How the Hex Calculator works
Hexadecimal uses sixteen digits — 0 to 9 then A to F — so each one carries exactly four bits. That is why it is the standard shorthand for binary data: colours, memory addresses and byte values all read more easily in hex than in eight-digit strings of ones and zeros.
Also known as: hex to decimal · decimal to hex converter · hexadecimal converter · hex to binary converter
Frequently asked questions
How do I convert hex to decimal?
Each place is worth sixteen times the one to its right. FF is 15 × 16 + 15 = 255.
What do the letters mean?
A through F stand for 10 through 15, the values that need a single digit in base 16 but two in base 10.
Why is hex used for colours?
Because each colour channel is one byte, which is exactly two hex digits. FF0000 is full red, no green, no blue.
How does hex relate to binary?
One hex digit is precisely four binary digits, so F is 1111 and FF is 11111111. Converting between them needs no calculation.
Put this calculator on your own site
Free to use, on any site, commercial or not. Paste this where you want it to appear. It is a plain iframe, so it works in WordPress, Squarespace, Wix, Webflow, Ghost and anything else that accepts HTML.
<iframe src="https://www.thecalclibrary.com/embed/hex-calculator" width="100%" height="640" style="border:1px solid #e2e8f0;border-radius:12px" loading="lazy" title="Hex Calculator"></iframe>The only condition is that the credit line stays visible. It sits inside the frame, so you do not have to do anything to keep it.