MB to GB Formula
Data conversion relies on whether you are measuring according to the International System of Units (SI decimal standard) or the International Electrotechnical Commission (IEC binary standard):
SI Decimal Standard (Base-10)
$$\text{Gigabytes (GB)} = \frac{\text{Megabytes (MB)}}{1,000}$$
Example (Decimal):
$$\text{GB} = \frac{2,500\text{ MB}}{1,000} = \mathbf{2.5\text{ GB}}$$
IEC Binary Standard (Base-2)
$$\text{Gibibytes (GiB)} = \frac{\text{Mebibytes (MiB)}}{1,024}$$
Example (Binary):
$$\text{GiB} = \frac{2,500\text{ MiB}}{1,024} \approx \mathbf{2.4414\text{ GiB}}$$
Decimal (SI) vs. Binary (IEC) Conversion Table
Quick reference conversions for common file sizes and memory allocations:
| Megabytes (MB) | Decimal Standard (Base-10) | Binary Standard (Base-2) |
|---|---|---|
| 500 MB | 0.5 GB | 0.4883 GiB |
| 1,000 MB | 1.0 GB | 0.9537 GiB |
| 1,024 MB | 1.024 GB | 1.0 GiB |
| 2,000 MB | 2.0 GB | 1.9073 GiB |
| 5,000 MB | 5.0 GB | 4.6566 GiB |
| 10,000 MB | 10.0 GB | 9.3132 GiB |
How to Use This Calculator
- Enter the quantity in Megabytes (MB) in the Megabytes input box.
- View the computed equivalent in Gigabytes (GB) updated in real time.
Frequently Asked Questions
How many MB are in a GB?
1,000 MB under the decimal standard used here, or 1,024 MB under the binary standard.
Why does my phone show less storage than advertised?
Manufacturers use the decimal GB (1,000 MB), but the phone's operating system often reports free space using binary GB, making the same storage look smaller.
How do I convert GB back to MB?
Multiply the number of gigabytes by 1,000.
Is 1 GB always exactly 1,000 MB?
Under the decimal standard, yes — this calculator uses that convention throughout.