Every unit at once
Type one value and see it in bits, bytes, KB, MB, GB, TB, PB and their binary KiB to PiB versions.
Free tech tool · Decimal and binary
MB to GB Converter Convert Every Data Storage Unit, From Bits to Petabytes
Convert MB to GB, GB to TB, KB to MB and every other data unit in both decimal (1,000) and binary (1,024) systems. This free MB to GB converter also works out download times and shows why your new drive looks smaller than advertised.
- All units, both systems
- Download time calculator
- Real drive capacity check
MB to GB converter
Result
1,000MB
1 GB = 1,000 MB (decimal, 1 GB = 1,000,000,000 bytes)
Decimal units powers of 1,000
Binary units powers of 1,024
File size
Connection speed
Estimated download time
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- Speed in MB/s
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- Realistic time (80% speed)
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- Data per hour
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- Speed in Mbps
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Internet speeds are sold in megabits per second (Mbps). Divide by 8 to get megabytes per second. Real downloads are usually slower because of network overhead and server limits.
Advertised capacity
Quick picks
What Windows will show
931.32GB
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- macOS and drive makers
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- Exact bytes
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Estimates assume 4 MB per 12-megapixel photo, about 3.84 MB per 4-minute MP3 song at 128 kbps, 3 GB per hour of HD video and 7 GB per hour of 4K video. Some space is also used by the file system and pre-installed software.
Features
The only data converter you need
Most converters pick one definition of a gigabyte and hide it. This one shows both, so your answer matches your operating system, your drive box and your internet plan.
Decimal or binary
Switch between 1 GB = 1,000 MB and 1 GB = 1,024 MB to match drive makers, macOS or Windows.
Download time
Enter a file size and your connection speed to see how long a download or upload should take.
Real drive capacity
Find out why a 1 TB drive shows 931 GB, and how many photos, songs and hours of video it really holds.
Mbps to MB/s
Understand internet speeds at a glance, with megabits and megabytes per second side by side.
Tap to copy
Click any value in the results list to copy it, ready to paste into a spreadsheet, email or code.
How to use
How to use the MB to GB converter
Enter a value
Type the number you want to convert, such as 500 for 500 MB.
Pick the units
Choose what you are converting from and to, or use the swap button to flip them.
Choose the system
Use decimal for drive sizes and macOS, or binary to match Windows and memory sizes.
Explore the extras
Switch tabs to estimate download times or check a drive's real capacity.
Chart
MB to GB conversion table
Common megabyte values converted to gigabytes in both systems.
| Megabytes | GB (divide by 1,000) | GB (divide by 1,024) |
|---|---|---|
| 1 MB | 0.001 GB | 0.000977 GB |
| 10 MB | 0.01 GB | 0.009766 GB |
| 50 MB | 0.05 GB | 0.048828 GB |
| 100 MB | 0.1 GB | 0.097656 GB |
| 250 MB | 0.25 GB | 0.244141 GB |
| 500 MB | 0.5 GB | 0.488281 GB |
| 700 MB | 0.7 GB | 0.683594 GB |
| 1,000 MB | 1 GB | 0.976563 GB |
| 1,024 MB | 1.024 GB | 1 GB |
| 2,048 MB | 2.048 GB | 2 GB |
| 4,096 MB | 4.096 GB | 4 GB |
| 5,000 MB | 5 GB | 4.882813 GB |
| 8,192 MB | 8.192 GB | 8 GB |
| 10,000 MB | 10 GB | 9.765625 GB |
| 16,384 MB | 16.384 GB | 16 GB |
| 50,000 MB | 50 GB | 48.828125 GB |
Learn
Decimal vs binary: why 1 GB can mean two things
Storage makers count in powers of 1,000, while Windows and computer memory count in powers of 1,024. Both call the result a gigabyte, which causes most of the confusion.
| Unit | Decimal (SI) bytes | Binary unit | Binary (IEC) bytes |
|---|---|---|---|
| Kilobyte (KB) | 1,000 | Kibibyte (KiB) | 1,024 |
| Megabyte (MB) | 1,000,000 | Mebibyte (MiB) | 1,048,576 |
| Gigabyte (GB) | 1,000,000,000 | Gibibyte (GiB) | 1,073,741,824 |
| Terabyte (TB) | 1,000,000,000,000 | Tebibyte (TiB) | 1,099,511,627,776 |
| Petabyte (PB) | 1,000,000,000,000,000 | Pebibyte (PiB) | 1,125,899,906,842,624 |
Decimal (SI) units
Used by hard drive and SSD makers, USB sticks, network speeds and macOS since 2009. Each step is 1,000 times bigger.
1 GB = 1,000 MBBinary (IEC) units
Used for RAM and by Windows, which labels them GB. The official names are kibibyte, mebibyte and gibibyte.
1 GiB = 1,024 MiBBits vs bytes
A byte is 8 bits. Internet speeds use bits (lowercase b), while file sizes use bytes (uppercase B).
100 Mbps = 12.5 MB/sFAQ
MB to GB converter FAQ
How many MB are in a GB?
In the decimal system used by storage makers and macOS, 1 GB equals 1,000 MB. In the binary system used by Windows and for memory, 1 GB equals 1,024 MB. Strictly speaking, the binary version is called a gibibyte (GiB) containing 1,024 mebibytes (MiB).
How do I convert MB to GB?
Divide the number of megabytes by 1,000 for decimal gigabytes, or by 1,024 for binary gigabytes. For example, 500 MB is 0.5 GB in decimal or about 0.488 GB in binary.
Why does my 1 TB drive only show 931 GB?
Drive makers define 1 TB as 1,000,000,000,000 bytes. Windows divides that by 1,024 three times and labels the result GB, so it shows about 931 GB. The space is all there; it is simply measured with a larger unit.
What is the difference between MB and MiB?
A megabyte (MB) is 1,000,000 bytes, while a mebibyte (MiB) is 1,048,576 bytes, or 1,024 × 1,024. The binary units KiB, MiB and GiB were introduced by the IEC to remove the confusion between the two systems.
How long does it take to download 1 GB?
At 100 Mbps, 1 GB (8,000 megabits) takes about 80 seconds in ideal conditions. At 25 Mbps it takes about 5 minutes 20 seconds. Real downloads are usually a little slower because of network overhead and server limits.
What is the difference between Mbps and MB/s?
Mbps means megabits per second and MB/s means megabytes per second. Because 1 byte is 8 bits, divide Mbps by 8 to get MB/s. A 100 Mbps connection downloads at up to about 12.5 MB/s.
How many photos can 128 GB hold?
Assuming about 4 MB per 12-megapixel JPEG photo, 128 GB holds roughly 32,000 photos. Higher-resolution cameras, RAW files and HEIC images change this a lot, and some space is used by the system.
Is a kilobyte 1,000 or 1,024 bytes?
By the official SI and IEC standards, a kilobyte is 1,000 bytes and 1,024 bytes is a kibibyte. In everyday use, many people and Windows still treat a kilobyte as 1,024 bytes, which is why this converter lets you choose.
Get the right number, every time
Use the MB to GB converter for storage, downloads and data plans, and stop guessing whether a gigabyte means 1,000 or 1,024. For more handy converters, explore our free online tools.
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