By CalculatorInn Team · Updated: 2026-03-22 · Free & accurate · Instant results
Convert between hexadecimal (base 16), decimal (base 10), binary (base 2), and octal (base 8) number systems.
Interactive Hex to Decimal Converter
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Decimal = Σ (digit × 16^position) for each hex digit
Each hex digit represents a power of 16. The rightmost digit is 16^0 (ones), next is 16^1 (sixteens), etc. Hex digits: 0-9 plus A(10), B(11), C(12), D(13), E(14), F(15).
Hex is used in programming for memory addresses, CSS colors (#FF5733), MAC addresses, and representing binary data compactly. Each hex digit maps to exactly 4 binary bits.
Convert each hex digit to 4 binary digits. F=1111, A=1010, 0=0000. So 0xFA = 1111 1010 in binary.
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