Convert Gigabits to Megabits (Gbit to Mbit)
1 gigabit (Gbit) = 1000 megabits (Mbit). 1 Mbit = 0.001 Gbit. Example: 15 Gbit = 15 × 1000 = 15000 Mbit.
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1 Gbit = 1000 Mbit
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk gigabit to megabit converter to paste a column from Excel.
How to Convert Gigabit to Megabit
- 1 Gbit = 1000 Mbit
- 1 Mbit = 0.001 Gbit
- Example: convert 15 Gbit to Mbit: 15 Gbit = 15 × 1000 Mbit = 15000 Mbit
Formula
Mbit = Gbit × 1000
Derivation from SI units:
- 1 Gbit = 10⁹ bits.
- 1 Mbit = 10⁶ bits.
- 1 Gbit = 1000000000 bit ÷ 1000000 bit per Mbit = 1000 Mbit
Both units are defined exactly, so the factor is exact. Gigabit definition: gigabit; Megabit definition: megabit.
Worked examples
- A reading of 16 Gbit converts to 16000 Mbit.
16 Gbit × 1000 = 16000 Mbit - A value of 128 Gbit is 128000 Mbit.
128 Gbit × 1000 = 128000 Mbit
Gigabit to Megabit conversion table
| Gigabits (Gbit) | Megabits (Mbit) |
|---|---|
| 1 Gbit | 1000 Mbit |
| 2 Gbit | 2000 Mbit |
| 4 Gbit | 4000 Mbit |
| 8 Gbit | 8000 Mbit |
| 16 Gbit | 16000 Mbit |
| 32 Gbit | 32000 Mbit |
| 64 Gbit | 64000 Mbit |
| 100 Gbit | 100000 Mbit |
| 128 Gbit | 128000 Mbit |
| 256 Gbit | 256000 Mbit |
| 500 Gbit | 500000 Mbit |
| 1000 Gbit | 1000000 Mbit |
Where it's used
Gigabits are used for DRAM and NAND flash chip densities, while megabits appear in network and broadband quantities. Both measure amount of digital information, so the conversion is a fixed factor.
Gigabit to other data storage units
| Conversion | 1 Gbit equals |
|---|---|
| gigabit to megabit | 1000 Mbit |
| gigabit to byte | 125000000 B |
| gigabit to kilobyte | 125000 kB |
| gigabit to megabyte | 125 MB |
| gigabit to gigabyte | 0.125 GB |
| gigabit to terabyte | 0.000125 TB |
| gigabit to bit | 1000000000 bit |
| gigabit to kibibyte | 122070.3125 KiB |
Show 5 more units
| gigabit to mebibyte | 119.2092896 MiB |
|---|---|
| gigabit to gibibyte | 0.1164153218 GiB |
| gigabit to kilobit | 1000000 kbit |
| gigabit to petabyte | 1.25 × 10⁻⁷ PB |
| gigabit to tebibyte | 0.0001136868377 TiB |
Frequently asked questions
How many megabits are in 1 gigabit?
1 Gbit = 1000 Mbit.
How do I convert gigabits to megabits?
Multiply the value in Gbit by 1000. For example, 15 Gbit × 1000 = 15000 Mbit.
Is the Gbit to Mbit conversion exact?
Yes. Both units are defined exactly, and 1 Gbit is exactly 1000 Mbit.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7 (SI prefixes); hertz, Table 4.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Gigabits to Megabits (Gbit to Mbit). Retrieved October 25, 2026, from https://scientificconverters.com/data-storage/gigabits-to-megabits/
IEEE
Scientific Converters, "Convert Gigabits to Megabits (Gbit to Mbit)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/data-storage/gigabits-to-megabits/