How the conversion works
1000 ÷ 1000 = 1 GB. The quick answer is rounded for readability; use the live calculator below for another value or more precision.
1000 MB to GB — 1000 MB = 1 GB
1000 MB equals 1 GB using decimal storage units where 1 GB = 1000 MB. See the formula, nearby values and why MiB/GiB are different binary units.
Quick reference
1 GB
1000 MB → GB
When this is useful
Use this conversion when checking upload limits, storage sizes, attachment limits, download sizes or device capacity. Keeping MB, GB and binary units distinct prevents file-size mistakes.
Quick comparison table
Compare the current answer with nearby or reverse values from the same converter family. Open any row to keep the units preselected and change the number.
Why 1000 MB can show as 0.93 GB
1000 MB is exactly 1 GB in decimal units. The same 1,000,000,000 bytes are 953.67 MiB or 0.93 GiB in binary units, and Windows File Explorer counts in binary while still writing "KB", "MB" and "GB".
| Counting system | 1000 MB equals | Where you see it |
|---|---|---|
| Decimal (SI) | 1 GB | Drive and memory-card packaging, download sizes |
| Binary (IEC) | 0.93 GiB | Windows File Explorer, labelled GB |
| Bytes | 1,000,000,000 | Identical in both systems |
- Nothing is lost: the file holds the same bytes and only the unit changes. Binary display shows 2.3% less at the kilobyte level and 6.9% less at the gigabyte level.
- For the same reason a 1 TB drive appears as about 931 GB in Windows.
- If an upload form allows "1 GB", a 1000 MB file fits under the decimal reading, and under a binary reading (1,073,741,824 bytes) it has 73.7 MB to spare.
Decimal GB = MB ÷ 1000. To predict what Windows shows, multiply the decimal GB figure by 0.9313.
Convert another value
1 GB
1,000 MB
KB/MB/GB/TB are decimal units (1000). KiB/MiB/GiB/TiB are binary units (1024). They are distinct units.
A quick note before you use the number
This page uses decimal MB and GB for MB↔GB examples: 1 GB = 1000 MB. Binary MiB and GiB use powers of 1024 and are separate units.
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