Convert integers between bases 2–36 for programming, electronics, and color codes. Digits 0–9 and A–Z supported; exact integer math.
Hex and colors
Channel FF → decimal 255: from base 16 to base 10.
Binary
Long bit strings to decimal without manual powers of two.
Integers only
No radix fractions—large values stay exact.
Frequently asked questions
Binary 1010 in decimal?
10—set from base 2, to base 10, enter 1010.
Hex FF in decimal?
255—from base 16, enter FF, to base 10.
Why letters A–F?
Digits above 9 use A–F in hex; bases up to 36 use 0–9 and A–Z on this page.
Fractions or decimals?
Integers only—no radix points. Good for addresses, color codes, and bit patterns.
Same as a programmer calculator?
This page converts base strings; for bitwise or float math use dev tools; verify decimals on the scientific calculator.
Can I save my inputs?
Yes. Copy link below the form keeps your current inputs so you can share the scenario or save it for later.