Data size converters

Data sizes use two number systems that look almost the same and disagree at every power: decimal (1 kB = 1,000 B, used by storage marketing and most modern OSes) and binary (1 KiB = 1,024 B, used by RAM, classic operating systems, and most file managers). Convertitive uses the decimal scale by default — that's how disk capacities are sold and what the IEC standard recommends — and offers the binary 'i' units (KiB, MiB, GiB) as opt-in non-core selections in the dropdown.