MB → GB (decimal)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
1 GB = 1.000 MB
About this calculator
This converter calculates values between megabytes (MB) and gigabytes (GB) using the decimal scale, standard in storage device manufacturers. The base formula is 1 GB = 1000 MB. It's suitable for HDs, SSDs, or USB drives, which commonly use this standardization.
To convert, simply input the value in MB or GB and click the corresponding button. Results are displayed instantly using a 1:1000 ratio. For example: 2500 MB equals 2.5 GB. The conversion doesn't account for binary adjustments (like 1024 MB = 1 GB).
Note: Operating systems like Windows or macOS use the binary scale (1 GB = 1024 MB), which might cause discrepancies. When comparing advertised storage specs with displayed space on your computer, check which system applies to avoid confusion.
Use this tool for decimal-scale storage capacity comparisons. It's ideal for consumers verifying advertised content of electronic devices using the metric system.
Frequently asked questions
Why use 1000 instead of 1024 for conversion?
The decimal scale (1000) is used by hardware manufacturers, while operating systems use the binary scale (1024). We chose the decimal system to align with device specifications.
When should I use this converter?
Use it to verify advertised capacities of HDDs, SSDs, or USB drives, which typically follow the decimal scale.
Are decimal and binary conversions different?
Yes. Decimal uses 1000, binary uses 1024. This can create up to 2% variations in large values.
Can I use this tool for data transfer speeds?
We don't recommend it, as transfer speeds often use the binary scale. Use this converter only for storage capacity values.
How does the conversion formula work?
The tool divides or multiplies the input value by 1000, depending on the conversion direction (MB → GB or GB → MB).