Conversion method
Decimal prefixes use powers of 1,000: 1 GB = 1,000 MB. Binary prefixes use powers of 1,024: 1 GiB = 1,024 MiB. Eight bits make one byte; a lowercase b and uppercase B can change the quantity by a factor of eight.
GB = x × 0.001
10 MB = 0.01 GB.
| MB | GB |
|---|---|
| 1 | 0.001 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
Unit definitions and sources
kB, MB and GB are decimal. KiB, MiB and GiB are binary. One byte is eight bits; capitalization matters.
13 of the 26 definitions below were checked against the cited sources on 2026-09-20 (AI-assisted check).
| Unit and system | Use | Definition | Relationship |
|---|---|---|---|
| Bit (bit); other | Common units | Bit measures data storage. b = (value in bit) × 0.125. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Byte (B); other | Common units | Byte measures data storage. b = (value in B) × 1. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Kilobyte (kB); si | Common units | Kilobyte measures data storage. b = (value in kB) × 1000. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Megabyte (MB); si | Common units | Megabyte measures data storage. b = (value in MB) × 1000000. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Gigabyte (GB); si | Common units | Gigabyte measures data storage. b = (value in GB) × 1000000000. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Terabyte (TB); si | Common units | Terabyte measures data storage. b = (value in TB) × 1000000000000. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Kibibyte (KiB); other | Common units | Kibibyte measures data storage. b = (value in KiB) × 1024. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Mebibyte (MiB); other | Common units | Mebibyte measures data storage. b = (value in MiB) × 1048576. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Gibibyte (GiB); other | Common units | Gibibyte measures data storage. b = (value in GiB) × 1073741824. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Tebibyte (TiB); other | Common units | Tebibyte measures data storage. b = (value in TiB) × 1099511627776. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Kilobit (kbit); si | Common units | Kilobit measures data storage. b = (value in kbit) × 125. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Megabit (Mbit); si | Common units | Megabit measures data storage. b = (value in Mbit) × 125000. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Gigabit (Gbit); si | Common units | Gigabit measures data storage. b = (value in Gbit) × 125000000. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Kibibit (Kibit); other | Specialist units | kibi uses 2^10; a byte is eight bits. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Mebibit (Mibit); other | Specialist units | mebi uses 2^20; a byte is eight bits. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Gibibit (Gibit); other | Specialist units | gibi uses 2^30; a byte is eight bits. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Terabit (Tbit); other | Specialist units | tera uses 10^12; a byte is eight bits. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Tebibit (Tibit); other | Specialist units | tebi uses 2^40; a byte is eight bits. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Petabit (Pbit); other | Specialist units | peta uses 10^15; a byte is eight bits. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Petabyte (PB); other | Specialist units | peta uses 10^15; a byte is eight bits. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Pebibit (Pibit); other | Specialist units | pebi uses 2^50; a byte is eight bits. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Pebibyte (PiB); other | Specialist units | pebi uses 2^50; a byte is eight bits. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Exabit (Ebit); other | Specialist units | exa uses 10^18; a byte is eight bits. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Exabyte (EB); other | Specialist units | exa uses 10^18; a byte is eight bits. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Exbibit (Eibit); other | Specialist units | exbi uses 2^60; a byte is eight bits. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
| Exbibyte (EiB); other | Specialist units | exbi uses 2^60; a byte is eight bits. Common use: Digital storage capacity. | Exact definition; numerical display may be rounded |
Precision of data storage conversions
All 26 data storage units convert through Byte (B). 26 have an exact defined relationship to the base unit and 0 are conventional or measured values. Results and the tables on this page come from the same engine, so a table value can be checked against the converter directly.
Standard display shows up to six decimal places, switching to scientific notation for very large or small values. Calculation uses JavaScript binary floating point independently of display rounding, so extra digits are not a claim about measurement accuracy. Each unit lists its own source; a citation records where the definition comes from, not an independent review. See Conversion methodology for the review and correction process.