All conversions
| Unit | Value | Copy |
|---|---|---|
| Bit (b) | — | |
| Kilobit (kb) | — | |
| Megabit (Mb) | — | |
| Gigabit (Gb) | — | |
| Byte (B) | — | |
| Kilobyte (KB) | — | |
| Megabyte (MB) | — | |
| Gigabyte (GB) | — | |
| Terabyte (TB) | — | |
| Petabyte (PB) | — | |
| Kibibyte (KiB) | — | |
| Mebibyte (MiB) | — | |
| Gibibyte (GiB) | — | |
| Tebibyte (TiB) | — | |
| Pebibyte (PiB) | — |
Storage manufacturers count in powers of 1,000 while operating systems often count in powers of 1,024. Convert between both systems and bits without confusion.
How to use the Data Storage Converter
- 1 Type a value in either box — the conversion works in both directions.
- 2 Choose the units to convert storage from and to, or click any row in the table.
- 3 Use the swap button to reverse the conversion, then copy the result.
Formula
Decimal (SI): 1 KB = 1,000 B, 1 MB = 1,000 KB … Binary (IEC): 1 KiB = 1,024 B, 1 MiB = 1,024 KiB … 1 byte = 8 bits
Worked examples
Input: 1 TB
Result: 931.32 GiB
Why Windows shows "931 GB"
Input: 4.7 GB
Result: 37.6 gigabits
Why does my 1 TB drive show 931 GB?
The drive maker uses decimal units: 1 TB = 10¹² bytes. Windows divides by 1,024³ but labels the result "GB" — it is really GiB. 10¹² ÷ 1,073,741,824 ≈ 931.3 GiB. No space is missing.
Bits vs. bytes
Internet speeds are measured in bits per second (Mbps), file sizes in bytes. Divide megabits by 8 to get megabytes: a 100 Mbps connection downloads at most about 12.5 MB per second.
Frequently asked questions
How many MB are in a GB?
1,000 MB in decimal units, or 1,024 MiB in a GiB.
What is the difference between GB and GiB?
A GB is 1,000,000,000 bytes; a GiB is 1,073,741,824 bytes (2³⁰).
How many bits are in a byte?
8 bits.
Related tools
Length Converter
Convert between metres, kilometres, centimetres, millimetres, miles, yards, feet, inches and nautical miles.
Weight Converter
Convert mass between kilograms, grams, milligrams, tonnes, pounds, ounces, stones and US/UK tons.
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin and Rankine — with absolute-zero validation.
Area Converter
Convert square metres, square feet, acres, hectares, square miles, square kilometres and more.
Volume Converter
Convert litres, millilitres, cubic metres, US and UK gallons, quarts, pints, cups, fluid ounces and spoons.
Speed Converter
Convert km/h, mph, m/s, knots, ft/s and Mach.