ConvertorLab

GB to MB Converter

Enter gigabytes to get megabytes. Both counts are shown: 1 GB = 1000 MB in decimal and 1024 MB in binary, so the answer lines up with your phone, plan or PC.

How to convert GB to MB

To convert GB to MB, multiply by 1000. 1 GB is 1,000 MB and 1.5 GB is 1,500 MB. In the binary system Windows uses, multiply by 1024: 1 GB shows as 1,024 MB.

People look this up to split a data plan, check whether a video fits a sharing limit, or compare storage figures between devices. The converter keeps both answers on screen so you can use whichever matches the number you started with.

GB to MB formula

  • Decimal: MB = GB x 1000
  • Binary: MiB = GiB x 1024

Example: 2 GB x 1000 = 2,000 MB. In binary, 2 x 1024 = 2,048 MiB.

GB to MB conversion table

GBMB (1000)MB (1024)
0.25 GB250 MB256 MB
0.5 GB500 MB512 MB
1 GB1,000 MB1,024 MB
1.5 GB1,500 MB1,536 MB
2 GB2,000 MB2,048 MB
3 GB3,000 MB3,072 MB
4 GB4,000 MB4,096 MB
5 GB5,000 MB5,120 MB
8 GB8,000 MB8,192 MB
10 GB10,000 MB10,240 MB
16 GB16,000 MB16,384 MB
32 GB32,000 MB32,768 MB

Why are there two answers: 1000 or 1024?

Computers count in powers of two, so early on a kilobyte was taken to mean 1,024 bytes. Standards bodies later fixed the prefixes to their usual meaning, kilo for 1,000, and added separate names for the binary units: KiB, MiB and GiB. Drive makers, network figures and macOS use the decimal units. Windows File Explorer still divides by 1024 but prints KB, MB and GB.

That's why a 1 TB drive shows about 931 GB in Windows. Nothing is missing; it's the same number of bytes counted two ways. For a longer explanation, read how many KB are in a MB and how many MB are in a GB.

File too big for an upload limit?

If the conversion shows your file is over the limit, shrink it to a set size instead of guessing. Image Compressor takes photos down to a target such as 50 KB or 200 KB, and Compress PDF does the same for documents. Aim slightly under the limit, for example 190 KB for a 200 KB cap, so the file passes whichever way the site counts.

ConvertKB to MB ConverterFile size units, 1000 or 1024.Open toolConvertMB to KB ConverterFile size units, 1000 or 1024.Open toolConvertMB to GB ConverterFile size units, 1000 or 1024.Open toolCompressImage CompressorShrink a photo to an exact KB limit.Open tool
How many KB in a MB?How many KB in a MB?1000 or 1024, and which one to use.Read guideHow many MB in a GB?How many MB in a GB?Why storage numbers never quite match.Read guide

GB to MB questions

How many MB is 1 GB?

1,000 MB in decimal and 1,024 MB in binary.

How many MB is 1.5 GB?

1,500 MB in decimal and 1,536 MB in binary.

How many MB is half a GB?

500 MB in decimal and 512 MB in binary.

Which number do mobile data plans use?

Plans usually describe data in decimal units, though each provider sets its own rules. Check your provider's terms if the exact count matters.

Can I convert GB to KB here?

Yes. Change the To menu to KB, or to bytes.