Megabytes to gigabytes conversion table
Every row is computed with the exact factor the converter above uses:
1 MB = 0.001 GB (GB = MB × 0.001).
Looked-up values are rounded to 3 decimals;
type any amount into the tool for other megabytes values.
| MB | GB |
|---|---|
| 1 MB | 0.001 GB |
| 5 MB | 0.005 GB |
| 10 MB | 0.01 GB |
| 25 MB | 0.025 GB |
| 50 MB | 0.05 GB |
| 64 MB | 0.064 GB |
| 100 MB | 0.1 GB |
| 128 MB | 0.128 GB |
| 150 MB | 0.15 GB |
| 200 MB | 0.2 GB |
| 250 MB | 0.25 GB |
| 256 MB | 0.256 GB |
| 300 MB | 0.3 GB |
| 350 MB | 0.35 GB |
| 400 MB | 0.4 GB |
| MB | GB |
|---|---|
| 450 MB | 0.45 GB |
| 500 MB | 0.5 GB |
| 512 MB | 0.512 GB |
| 600 MB | 0.6 GB |
| 650 MB | 0.65 GB |
| 700 MB | 0.7 GB |
| 750 MB | 0.75 GB |
| 800 MB | 0.8 GB |
| 850 MB | 0.85 GB |
| 900 MB | 0.9 GB |
| 950 MB | 0.95 GB |
| 1000 MB | 1 GB |
| 1024 MB | 1.024 GB |
| 1200 MB | 1.2 GB |
| 1500 MB | 1.5 GB |
| MB | GB |
|---|---|
| 2000 MB | 2 GB |
| 2048 MB | 2.048 GB |
| 2500 MB | 2.5 GB |
| 3000 MB | 3 GB |
| 4000 MB | 4 GB |
| 4096 MB | 4.096 GB |
| 5000 MB | 5 GB |
| 8192 MB | 8.192 GB |
| 10000 MB | 10 GB |
| 16384 MB | 16.384 GB |
| 20000 MB | 20 GB |
| 51200 MB | 51.2 GB |
| 102400 MB | 102.4 GB |
Going the other way? Use the gigabytes to megabytes converter.
MB in, GB out, and the honest answer to “1000 or 1024?”
Let’s deal with the messy part first, because every other MB-to-GB tool quietly picks one answer and hides the other. There are two valid conversions, and which one is correct depends on context.
- Decimal (SI): 1 GB = 1000 MB. This is the official standard. It’s what storage manufacturers, network speeds, and phone plans use. The tool defaults to this.
- Binary: 1 GiB = 1024 MiB. This is what your operating system usually means when it shows “GB,” even though the technically correct label is GiB (gibibyte).
So 500 MB is 0.5 GB the decimal way. Type a value, get the result instantly. There’s a toggle to switch to the 1024 basis if that’s what your situation calls for.
Why this confusion exists at all
Computers count in binary, so powers of two (1024) were the natural unit for memory. For decades, “kilobyte” loosely meant 1024 bytes. Then storage and networking adopted the strict SI meaning, where kilo means exactly 1000, and the two definitions collided.
To untangle it, standards bodies created separate binary units: kibibyte (KiB), mebibyte (MiB), gibibyte (GiB). One GiB is 1024 MiB. One GB is 1000 MB. Clean in theory. In practice, Windows still labels gibibytes as “GB,” macOS and most phones use true decimal GB, and almost nobody types “GiB” in casual conversation. So the same “GB” can mean two different sizes depending on who wrote it.
Where it bites you
This isn’t academic. The mismatch shows up constantly:
- Phone storage. A phone sold as “128 GB” gives you 128 billion bytes (decimal). Your photos and apps are measured the same way now, so modern phones mostly stay consistent.
- Hard drives and SSDs. A “1 TB” drive is 1,000,000,000,000 bytes. Windows reports it in GiB but calls them GB, so it shows roughly 931, and people think they were shortchanged. They weren’t. It’s just two unit systems clashing.
- Data plans. Mobile carriers bill in decimal GB. A 10 GB plan means 10,000 MB.
For most everyday conversions (data caps, file sizes, downloads) the decimal 1000 basis is the right call, which is why it’s the default here.
How to use it
Enter a megabyte value and the gigabyte result updates as you type. Leave the toggle on decimal (1000) for storage, plans, and downloads. Flip it to binary (1024) if you’re matching what your OS file manager reports. The conversion table above lists common sizes already worked out, so you can see the gap directly. All of it runs in your browser. Nothing you enter is uploaded, and it works offline once loaded.
FAQ
Is 1 GB 1000 MB or 1024 MB?
Both answers exist. The official SI standard is 1000 MB per GB, used by storage makers and carriers. The 1024 figure is technically 1 GiB (gibibyte), which is what operating systems often display while mislabeling it “GB.”
Which one should I use?
For data plans, file sizes, downloads, and drive capacity, use 1000 (decimal). For matching what Windows shows in its file properties, use 1024 (binary). The tool defaults to 1000 since that covers most searches.
How many GB is 512 MB?
512 MB is 0.512 GB in decimal terms. A half-gigabyte file, an old-school memory card, or a chunky app download all sit right around this size.
How many GB is 1500 MB?
1500 MB comes to 1.5 GB. Handy when a download manager reports progress in MB but your data plan counts in GB: 1500 MB eats one and a half gigabytes of the allowance.
Why does my 1 TB drive show as 931 GB?
Your OS is dividing by 1024 three times (binary) and labeling the result “GB,” but the drive maker counted in decimal (1000). The bytes are all there; it’s a labeling mismatch, not missing space.
What’s the difference between MB and MiB?
MB (megabyte) is 1,000,000 bytes. MiB (mebibyte) is 1,048,576 bytes (1024 squared). They differ by about 4.9%, and that gap grows at larger scales like GB versus GiB.
Does this calculate locally?
Yes. It’s browser-side math with both conversion factors built in, so nothing you type leaves your device and it runs without internet after loading.