Decimal converter

Decimal at the Center

Base-10 is the human system — ten fingers, ten digits — and this converter bridges it to the machine bases: binary (base-2), octal (base-8), and hexadecimal (base-16). Type a familiar number; see how computers actually store it.

Reading the Results

Each output is the same value in a different base: 255 = 11111111₂ = 377₈ = FF₁₆. Programmers live in hex (memory addresses, color codes); Unix permissions live in octal; binary reveals the bit patterns behind subnet masks and flags.

Mental Shortcuts

Powers of two are the landmarks: 2¹⁰ = 1024 ≈ 1K, 2¹⁶ = 65536, 2³² ≈ 4.3 billion. If a converted value lands near one of these, you are probably looking at a storage size, a port range, or an address boundary.