MB to GB Converter (Megabytes to Gigabytes)
Convert megabytes to gigabytes for data plans, file sizes and storage. 1 GB = 1,000 MB, so divide by 1,000. Windows and some apps use binary units, where 1 GiB = 1,024 MiB; the converter shows both.
Real-World Benchmarks
Multi-Unit Conversion Matrix
| Group | Measurement | Symbol | Equivalent Value |
|---|---|---|---|
| Bits | Bit | bit | 2.0000E10 |
| Bits | Kilobit | kb | 2.0000E7 |
| Bits | Megabit | Mb | 20,000 |
| Bits | Gigabit | Gb | 20 |
| Decimal (SI · 1000) | Byte | B | 2.5000E9 |
| Decimal (SI · 1000) | Kilobyte | KB | 2,500,000 |
| Decimal (SI · 1000) | Megabyte | MB | 2,500 |
| Decimal (SI · 1000) | Gigabyte | GB | 2.5 |
| Decimal (SI · 1000) | Terabyte | TB | 0.0025 |
| Decimal (SI · 1000) | Petabyte | PB | 2.5000E-6 |
| Decimal (SI · 1000) | Exabyte | EB | 2.5000E-9 |
| Binary (IEC · 1024) | Kibibyte | KiB | 2,441,406.25 |
| Binary (IEC · 1024) | Mebibyte | MiB | 2,384.1858 |
| Binary (IEC · 1024) | Gibibyte | GiB | 2.3283 |
| Binary (IEC · 1024) | Tebibyte | TiB | 0.0023 |
| Binary (IEC · 1024) | Pebibyte | PiB | 2.2204E-6 |
| Binary (IEC · 1024) | Exbibyte | EiB | 2.1684E-9 |
Step-by-Step Mathematical Explanation
- Step 1: Convert 2,500 MB to the base unit (B): 2,500 × 1,000,000 = 2.5000E9 B.
- Step 2: Convert base bytes to gigabytes: 2.5000E9 ÷ 1,000,000,000 = 2.5 GB.
- Direct factor: 1 MB = 0.001 GB.
Essential Conversion Factors
Megabyte: 1,000 KB — photos and songs
MB to GB formula
Direct Answer: 1 MB = 0.001 GB, so multiply by 0.001: GB = MB × 0.001. Going back: MB = GB × 1,000.
How to convert megabytes to gigabytes
SI prefixes are decimal: mega = 10⁶, giga = 10⁹, so 1 GB is 1,000 MB. Drive makers, mobile carriers and macOS use these. Windows reports sizes in binary units (1 GiB = 1,024 MiB = 1,073,741,824 bytes) but labels them "GB", which is why a 500 GB drive shows as about 465 GB.
1. MB → GB
Multiply the number of megabytes by the conversion factor:
Example: 2,500 MB × 0.001 = 2.5 GB.
2. GB → MB
To go back, divide by the same factor, or multiply by its reciprocal, 1,000:
Example: 2.5 GB ÷ 0.001 = 2,500 MB.
Shortcut: move the decimal point
To go from MB to GB, move the decimal point three places left. For the binary units Windows shows, divide by 1,024 instead (about 2.4% fewer):
2,500 MB = 2.5 GB; in binary, 2,500 MiB = 2.44 GiB.
1 MB in other data storage units
| Unit | 1 MB equals | Typical use |
|---|---|---|
| Bit | 8,000,000 bit | A single binary digit (0 or 1) |
| Kilobit | 8,000 kb | 1,000 bits |
| Megabit | 8 Mb | 1,000,000 bits |
| Gigabit | 0.008 Gb | 10⁹ bits |
| Byte | 1,000,000 B | 8 bits — one ASCII character |
| Kilobyte | 1,000 KB | 1,000 bytes |
| Gigabyte | 0.001 GB | 1,000 MB — phones and data plans |
| Terabyte | 0.000001 TB | 1,000 GB — hard drives and SSDs |
| Petabyte | 0.000000001 PB | 1,000 TB — data centers |
| Exabyte | 0.000000000001 EB | 1,000 PB — global internet traffic |
| Kibibyte | 976.5625 KiB | 1,024 bytes |
| Mebibyte | 0.95367432 MiB | 1,024 KiB — RAM and file sizes |
| Gibibyte | 0.00093132257 GiB | 1,024 MiB — what Windows calls "GB" |
| Tebibyte | 0.0000009094947 TiB | 1,024 GiB |
| Pebibyte | 0.00000000088817842 PiB | 1,024 TiB |
| Exbibyte | 0.00000000000086736174 EiB | 1,024 PiB |
MB to GB chart
| MB | GB |
|---|---|
| 1 | 0.001 |
| 10 | 0.01 |
| 50 | 0.05 |
| 100 | 0.1 |
| 200 | 0.2 |
| 250 | 0.25 |
| 300 | 0.3 |
| 500 | 0.5 |
| 700 | 0.7 |
| 750 | 0.75 |
| 800 | 0.8 |
| 1,000 | 1 |
| 1,024 | 1.024 |
| 1,500 | 1.5 |
| 2,000 | 2 |
| 2,500 | 2.5 |
| 3,000 | 3 |
| 4,000 | 4 |
| 5,000 | 5 |
| 8,000 | 8 |
| 10,000 | 10 |
| 20,000 | 20 |
| 50,000 | 50 |
| 100,000 | 100 |
GB to MB chart
| GB | MB |
|---|---|
| 0.1 | 100 |
| 0.25 | 250 |
| 0.5 | 500 |
| 0.75 | 750 |
| 1 | 1,000 |
| 1.5 | 1,500 |
| 2 | 2,000 |
| 2.5 | 2,500 |
| 3 | 3,000 |
| 4 | 4,000 |
| 5 | 5,000 |
| 8 | 8,000 |
| 10 | 10,000 |
| 16 | 16,000 |
| 20 | 20,000 |
| 25 | 25,000 |
| 32 | 32,000 |
| 50 | 50,000 |
| 64 | 64,000 |
| 100 | 100,000 |
| 128 | 128,000 |
| 256 | 256,000 |
| 512 | 512,000 |
| 1,000 | 1,000,000 |
Frequently Asked Questions
What is 500 MB in GB?
500 MB is 0.5 GB (500 × 0.001).
What is 1,024 MB in GB?
1,024 MB is 1.024 GB (1,024 × 0.001).
Is 1 GB 1,000 MB or 1,024 MB?
Both are in use. In SI (decimal) units 1 GB = 1,000 MB, used by storage makers, carriers and macOS. In binary (IEC) units 1 GiB = 1,024 MiB, used by Windows and RAM. Windows still writes "GB" for GiB.
How many photos or videos fit in 1 GB?
Roughly 250–400 phone photos at 2.5–4 MB each, or about 7 minutes of 1080p video at 20 Mbps. Exact numbers depend on resolution and compression.