Data Storage Converter
Convert between bits, bytes, KB, MB, GB, TB — decimal and binary.
Frequently Asked Questions
Why does my hard drive show less space than advertised?▼
Hard drive manufacturers use decimal gigabytes (1 GB = 10⁹ bytes). Your OS measures in binary gibibytes (1 GiB = 2³⁰ = 1,073,741,824 bytes). A '1 TB' drive is 10¹² bytes, which equals ~931 GiB in your OS.
What is the difference between a bit and a byte?▼
A bit is the smallest unit of data — a single 0 or 1. A byte is 8 bits and can represent 256 different values (2⁸). Text characters, pixels, and most data are measured in bytes or multiples of bytes.
What is the difference between KB and KiB?▼
KB (kilobyte) = 1,000 bytes in decimal SI. KiB (kibibyte) = 1,024 bytes in binary IEC. The IEC introduced KiB/MiB/GiB/TiB in 1998 to eliminate ambiguity, but KB is still loosely used for both.
How many GB is a 4K movie?▼
A 4K HDR movie typically ranges from 50–100 GB for a Blu-ray rip, or 15–25 GB for streaming quality. Blu-ray discs hold 50 GB (dual-layer) or 100 GB (triple-layer).