MB to GB Converter
Convert megabytes to gigabytes for digital storage, files, and device capacity.
How It Works
Formula: MB to GB = value ÷ 1024
Example: 1000 MB = 0.976563 GB
Note: 1 gigabyte equals 1024 megabytes in the binary standard used by operating systems.
Common Uses
Quick Conversion Table
| MB | GB |
|---|---|
| 0.25 | 0.0002 |
| 0.5 | 0.0005 |
| 1 | 0.001 |
| 2 | 0.002 |
| 4 | 0.0039 |
| 8 | 0.0078 |
| 16 | 0.0156 |
| 32 | 0.0313 |
| 64 | 0.0625 |
Rounding Rule
Rounded to 4 decimal places
Error Margin
±0.0001 GB
Precision Guidance
For file sizes, round to 2 decimals. For device capacity, keep 3-4 decimals.
Common Mistakes
Operating systems use binary (1024), while drive labels use decimal (1000). A 500 GB drive shows about 465 GiB in Windows.
Frequently Asked Questions
What is 1000 MB in GB?
1000 MB equals 0.9766 GB using the binary standard (1 GB = 1024 MB).
How do I convert MB to GB?
Divide the megabyte value by 1024. For example, 2048 MB ÷ 1024 = 2 GB.
Why does 1000 MB not equal 1 GB?
Computers use binary units (1024), so 1 GB is 1024 MB. Drive makers use decimal (1000), which is why a labeled 1 TB drive shows less in Windows.
Is this binary or decimal?
This uses the binary standard (1 GB = 1024 MB) used by operating systems.
Deep Dive Guide
MB to GB Conversion Guide for US Digital Storage and File Sizes
Convert MB to GB accurately for US phone storage, cloud plans, and file sizes. Learn the 1024 binary standard used by Windows and RAM.
Read Full Guide →More Converters You May Like
Exact Constants & Authoritative Sources
Every conversion on this page uses the fixed, internationally agreed constants below — drawn from NIST and the SI Brochure. No values are estimated or rounded as if exact. See the full list on our Sources & Standards page.
- EXACT1 kibibyte (KiB) = 1024 bytes (exact, binary, IEC)
- EXACT1 kilobyte (kB, decimal) = 1000 bytes (exact, SI)
- EXACT1 mebibyte (MiB) = 1,048,576 bytes; 1 megabyte (MB) = 1,000,000 bytes
- EXACT1 gibibyte (GiB) = 1,073,741,824 bytes; 1 gigabyte (GB) = 1,000,000,000 bytes
Common Pitfalls & How to Avoid Them
GB vs. GiB (the "missing" storage space)
Operating systems label gibibytes as "GB". A "500 GB" drive holds 500 × 10⁹ bytes = 465.66 GiB, which Windows shows as ~465 GB. The space is not "lost" — decimal vs. binary units differ.
kB vs. KB capitalization
Strictly, kB = 1000 bytes (SI) and KB is sometimes used for 1024 (binary). To avoid ambiguity use KiB/MiB/GiB for binary and kB/MB/GB for decimal.
A unit-conversion reference site has no manufacturer-specific or device calibration parameters, so "layered tuning" does not apply here. The only real error-handling is input validation: the converter rejects non-numeric, empty, or out-of-range entries and shows a clear message, then falls back to exact constants above. No estimated or rounded figures are ever presented as exact.
Authoritative sources for this page
- IEC (International Electrotechnical Commission) — IEC 80000-13 — Quantities and units for information science and technology (binary prefixes)
Last Updated 2026 | This converter was reviewed for accuracy