MB to GB Converter
Convert Megabytes to Gigabytes and vice versa instantly. Understand the difference between decimal (1000) and binary (1024) storage standards with clear, step-by-step calculations.
Calculate Data Storage
Enter your data value and select the units below. The calculator will show you the exact conversion with a clear, step-by-step breakdown of the math.
Data Storage Solver
Enter values to generate the conversion working out
Data Storage Quick Facts
Essential rules to remember for accurate conversions
How the Conversion Works
Converting between data storage units is a straightforward process of multiplying or dividing by the base factor (1000 or 1024) depending on the standard used.
Identify Your Units
Determine the starting unit (e.g., Megabytes) and the target unit (e.g., Gigabytes).
Choose the Standard
Decide whether to use the Decimal standard (base 1000, used for marketing) or the Binary standard (base 1024, used by computers).
Convert to Base Bytes
Multiply your starting value by its byte multiplier (e.g., for Decimal MB, multiply by 1,000,000) to find the total number of bytes.
Divide by Target Multiplier
Divide the total bytes by the target unit’s multiplier (e.g., for Decimal GB, divide by 1,000,000,000) to get your final answer.
Storage Unit Multipliers
A handy reference guide for the exact byte values of common data storage units in both standards.
| Unit | Decimal (SI) Multiplier | Binary (IEC) Multiplier | Common Use Case |
|---|---|---|---|
| Kilobyte (KB / KiB) | 1,000 Bytes (10³) | 1,024 Bytes (2¹⁰) | Small text files, emails |
| Megabyte (MB / MiB) | 1,000,000 Bytes (10⁶) | 1,048,576 Bytes (2²⁰) | Photos, MP3 songs, short videos |
| Gigabyte (GB / GiB) | 1,000,000,000 Bytes (10⁹) | 1,073,741,824 Bytes (2³⁰) | HD movies, modern games, phone storage |
| Terabyte (TB / TiB) | 1,000,000,000,000 Bytes (10¹²) | 1,099,511,627,776 Bytes (2⁴⁰) | External hard drives, PC storage |
| Petabyte (PB / PiB) | 1,000,000,000,000,000 Bytes (10¹⁵) | 1,125,899,906,842,624 Bytes (2⁵⁰) | Data centres, enterprise servers |
Data Conversion FAQ
Answers to the most frequently asked questions about data storage and unit conversion.
In the decimal (SI) system used by most storage manufacturers, 1 GB equals 1,000 MB. In the binary (IEC) system used by operating systems like Windows, 1 GiB equals 1,024 MiB.
Storage manufacturers advertise capacity using the decimal system (1 GB = 1,000 MB). However, operating systems like Windows calculate storage using the binary system (1 GiB = 1,024 MiB). This difference in calculation methods makes the drive appear smaller than the advertised decimal capacity.
To convert MB to GB using the decimal standard, divide the number of Megabytes by 1,000. For the binary standard, divide the number of Megabytes by 1,024.
MB (Megabyte) is a decimal unit equal to 1,000,000 bytes. MiB (Mebibyte) is a binary unit equal to 1,048,576 bytes (1024 x 1024). Operating systems often display ‘MB’ on screen when they are actually calculating ‘MiB’.