FF hex = 255 dec = 11111111 bin
Suggested Conversions
hex to decCommon Mathematical units
Tap a unit to set it as your "From" unit (use the rows above for From/To shortcuts).
Conversion tips
Quick Ratio
1 hex = 1 dec
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Base conversion is a routine step in CS and hardware—think memory addresses, color codes, and bitwise work. This page keeps radix rules explicit so you can spot mistakes early instead of chasing a stray digit.
Positional notation conquered commerce before silicon; binary triumphed because switches are 0/1. Hexadecimal compresses bitstrings for humans—hence the durable #RRGGBB palette.
N = Σ digit_i × base^i ; convert by repeated division (to new base) or Horner's method.
Integers are polynomials in the base. Converting replays that structure; floating conversion needs separate mantissa handling—stick to integers here unless the UI exposes fractions.
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These are independent references—government labs, international measurement bodies, or university course materials—that explain the definitions behind the numbers. We don’t endorse third-party sites; we point to them for deeper reading.
Short version: To convert Decimal to Binary, repeatedly divide by 2 and record the remainders in reverse order.
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Hexadecimal is used because it provides a human-friendly representation of binary-coded values. One hex digit represents exactly four bits (a nibble).
There are 8 bits in a byte, which can represent decimal values from 0 to 255.
Not numerically; style guides pick consistency. Parsers accept A-F case-insensitively.
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