Data Size Converter
Convert data storage and memory sizes across decimal SI (kB, MB, GB, TB, PB) and binary IEC (KiB, MiB, GiB, TiB, PiB) units. 100% free, private, and client-side.
Base Information Quantities (Exact)
Decimal SI (Base 10 / 10³)Standard Storage
Storage drives, network speeds, and standard SI multiples (10³ = 1,000)
| Unit | Value | Status | Copy |
|---|---|---|---|
Kilobyte kB | 1000000000 | Exact | |
Megabyte MB | 1000000 | Exact | |
Gigabyte GB | 1000 | Exact | |
Terabyte TB | 1 | Exact | |
Petabyte PB | 0.001 | Exact |
Binary IEC (Base 2 / 2¹⁰)Operating Systems & RAM
RAM, operating system file sizes, and IEC multiples (2¹⁰ = 1,024)
| Unit | Value | Status | Copy |
|---|---|---|---|
Kibibyte KiB | 976562500 | Exact | |
Mebibyte MiB | 953674.3164 | ≈ Rounded | |
Gibibyte GiB | 931.3226 | ≈ Rounded | |
Tebibyte TiB | 0.9095 | ≈ Rounded | |
Pebibyte PiB | 0.0009 | ≈ Rounded |
Storage Capacity Explainer: Decimal vs Binary Units
An advertised data capacity of 1 TB equals exactly 1000000000000 bytes (8000000000000 bits). When converted to binary units, this corresponds to approximately 931.3226 GiB (0.9095 TiB). Operating systems (such as Windows File Explorer) historically calculate disk sizes using binary factors (1 GiB = 1,073,741,824 bytes) while labeling them with the abbreviation "GB". Physical storage is not missing or lost; the same byte count is simply measured using base-2 units rather than base-10 units.
b; byte symbol is uppercase B.