Megabytes to gigabytes, both directions — with decimal (GB) and binary (GiB) results shown together, so the 1,000-vs-1,024 question answers itself.
Decimals:
3
My numbers come from:
1 GB = 1,000 MB — drives, phones, data plans
MB
File sizes, app downloads, RAM modules, data usage.
GB
Drive capacities, phone storage, monthly data caps.
Try a size:
How Many MB in a GB?
1 GB = 1,000 MB in decimal (SI) units — the official definition, used by drives, phones, and data plans. The famous 1,024 belongs to the binary system: 1 GiB = 1,024 MiB, used for RAM and by Windows file listings. Both are correct in their own context — the mistake is mixing them.
GB = MB ÷ 1,000 (decimal) · GiB = MiB ÷ 1,024 (binary) · per NIST and IEC 80000-13
This is the storage world's version of the bits-vs-bytes trap: one everyday word ("gigabyte") covering two different quantities about 7.4% apart. Most converter sites either ignore the split or — worse — present "1 GB = 1,024 MB" as a universal fact. Our calculator shows both results simultaneously, labeled, so whichever context your number came from, the right answer is on screen. The exact factors we use are documented in our methodology.
The Sizes People Actually Search
Notice the pattern: powers of two (1,024 · 2,048 · 4,096 · 8,192) come from RAM and binary contexts; round thousands come from storage and files.
500 MB
As storage (÷1,000):0.5 GB
As RAM/binary (÷1,024):0.488 GiB
Half a gigabyte — a compressed SD movie
1,000 MB
As storage (÷1,000):1 GB
As RAM/binary (÷1,024):0.977 GiB
One decimal gigabyte exactly
1,024 MB
As storage (÷1,000):1.024 GB
As RAM/binary (÷1,024):1 GiB
One binary gibibyte exactly — the RAM "1 GB"
2,048 MB
As storage (÷1,000):2.048 GB
As RAM/binary (÷1,024):2 GiB
2 GiB — small RAM module / game patch class
4,096 MB
As storage (÷1,000):4.096 GB
As RAM/binary (÷1,024):4 GiB
4 GiB — classic RAM size, FAT32 file-size limit
8,192 MB
As storage (÷1,000):8.192 GB
As RAM/binary (÷1,024):8 GiB
8 GiB — the most common laptop RAM size
16,384 MB
As storage (÷1,000):16.384 GB
As RAM/binary (÷1,024):16 GiB
16 GiB — gaming-PC RAM standard
50,000 MB
As storage (÷1,000):50 GB
As RAM/binary (÷1,024):48.8 GiB
A modern AAA game install
MB to GB Conversion Table
Both standards, clearly labeled
MB to GB
Megabytes
GB (decimal)
GiB (binary)
100 MB
0.1
0.093
250 MB
0.25
0.233
500 MB
0.5
0.466
1,000 MB
1
0.931
1,024 MB
1.024
0.954*
2,000 MB
2
1.863
5,000 MB
5
4.657
10,000 MB
10
9.313
100,000 MB
100
93.13
GB to MB
Gigabytes
MB (decimal)
Typical context
1 GB
1,000
Small mobile data plan
2 GB
2,000
HD movie (compressed)
5 GB
5,000
Typical game update
8 GB
8,000
Common RAM size (as 8 GiB = 8,192 MiB)
16 GB
16,000
Base phone storage tier
32 GB
32,000
USB stick class
64 GB
64,000
Entry phone storage
128 GB
128,000
Mainstream phone storage
500 GB
500,000
Standard laptop SSD
*1,024 MB equals 0.954 GiB when both sides are read as decimal-vs-binary — but if your "1,024 MB" is a RAM spec, it already is exactly 1 GiB. Context decides; the calculator's toggle handles both readings.
1,000 or 1,024? When Each Answer Is Right
The split isn't random — each system owns specific territory. Match your number's source to the right column and the ambiguity disappears:
Decimal — 1 GB = 1,000 MB
•Hard drives, SSDs, USB sticks (the number on the box)
•Phone and tablet storage tiers (64/128/256 GB)
•Mobile data plans and caps
•macOS file sizes (since 10.6)
•Network transfer totals
Binary — 1 GiB = 1,024 MiB
•RAM — always (8 GB RAM is exactly 8 GiB)
•Windows Explorer file and drive sizes (labeled "GB")
•Game console storage readouts
•Many Linux tools (ls -h, df -h default binary)
•Anything showing 1,024 / 2,048 / 4,096 / 8,192
The collision of the two systems is why a "1 TB" drive shows ~931 GB in Windows and a "128 GB" phone reports ~119 — the hardware is honest, the labels disagree (the full story, decoder included, in our GB vs GiB guide). The same lowercase-b/uppercase-B discipline from our Mbps vs MBps guide applies here too: precision about units is the entire game.
What a Megabyte and a Gigabyte Actually Hold
Numbers stick better with objects attached. Typical sizes (they vary with quality and compression):
It depends on the standard. In decimal (SI) units — used by storage manufacturers, phones, and data plans — 1 GB = 1,000 MB exactly. In binary (IEC) units — used for RAM and by Windows file listings — 1 GiB = 1,024 MiB. Both answers are correct in their own context, which is why this converter shows both side by side.
Is 1 GB equal to 1,000 MB or 1,024 MB?
Officially, 1 GB = 1,000 MB — the gigabyte is a decimal (SI) unit. The 1,024 factor belongs to the binary unit properly called a gibibyte (1 GiB = 1,024 MiB). The confusion exists because Windows and some apps calculate in binary but print "GB", so a file Windows calls "1 GB" is really 1 GiB = 1,073,741,824 bytes.
What is 8192 MB in GB?
8,192 MB = 8.192 GB in decimal units — but if those 8,192 MB describe RAM (a binary context), it is exactly 8 GiB, which is why memory modules show numbers like 8,192. Powers of two (2,048, 4,096, 8,192, 16,384) almost always signal a binary context.
Why does my 128 GB phone show less available storage?
Two reasons stack up. The operating system and pre-installed apps consume 10–20 GB before you store anything. And if the file manager counts in binary while the box uses decimal, 128 GB displays as about 119 "GB" (really GiB). Nothing is missing — it is accounting, not shrinkage.
Which is bigger, MB or GB?
GB is bigger — 1,000× bigger in decimal units. A megabyte holds about one minute of MP3 audio or a third of a smartphone photo; a gigabyte holds roughly 250 photos or an hour of standard-definition video.
How many MB is 1.5 GB?
1.5 GB = 1,500 MB in decimal units (1.5 × 1,000). In binary terms, 1.5 GiB = 1,536 MiB (1.5 × 1,024). For mobile data allowances — always decimal — 1.5 GB means exactly 1,500 MB of transfer.
