Gigabytes to Megabytes

Convert GB to MB instantly — decimal (SI), with a table, common file sizes, and a live calculator.

1 GB equals 1000 MB.

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Result (MB)1000 MB

GB to MB table

GBMB
1 GB1000 MB
2 GB2000 MB
3 GB3000 MB
5 GB5000 MB
10 GB10000 MB
15 GB15000 MB
20 GB20000 MB
25 GB25000 MB
30 GB30000 MB
40 GB40000 MB
50 GB50000 MB
60 GB60000 MB
75 GB75000 MB
90 GB90000 MB
100 GB100000 MB
120 GB120000 MB
150 GB150000 MB
200 GB200000 MB
250 GB250000 MB
300 GB300000 MB
400 GB400000 MB
500 GB500000 MB

MB to GB (reverse)

MBGB
1 MB0.001 GB
2 MB0.002 GB
3 MB0.003 GB
5 MB0.005 GB
10 MB0.01 GB
15 MB0.015 GB
20 MB0.02 GB
25 MB0.025 GB
30 MB0.03 GB
40 MB0.04 GB
50 MB0.05 GB
60 MB0.06 GB
75 MB0.075 GB
90 MB0.09 GB
100 MB0.1 GB
120 MB0.12 GB
150 MB0.15 GB
200 MB0.2 GB
250 MB0.25 GB
300 MB0.3 GB
400 MB0.4 GB
500 MB0.5 GB

Common file sizes

GBMB
5 GB5000 MB
10 GB10000 MB
25 GB25000 MB
50 GB50000 MB
75 GB75000 MB
100 GB100000 MB
120 GB120000 MB
150 GB150000 MB
200 GB200000 MB
300 GB300000 MB
400 GB400000 MB
500 GB500000 MB

How it scales

2500050000750001000000255075100GB

1 GB in other units

1000MB1000000KB1000000000bytes

The ratio at a glance

1 GB1000 MB

Decimal vs. binary — why 1 GB isn't always 1 GB

This page uses the decimal (SI) convention: 1 KB = 1000 bytes, 1 MB = 1000 KB, 1 GB = 1000 MB, and 1 TB = 1000 GB. That is how hard-drive and SSD makers, Google, and macOS state capacity. Windows and RAM, by contrast, use the binary (IEC) convention, where 1 KiB = 1024 bytes and 1 GiB = 1024 MiB. The gap grows with size: 1 GiB = 1.073741824 GB, which is why a 1 TB drive (1000 GB) shows as about 931 GiB in Windows. No storage is missing — these are simply two different measuring systems.

Data-storage conversions are exact and rest on fixed factors — for more unit pairs, use our data storage conversion hub.

Related conversions

Frequently asked questions

How many MB are in 1 GB?

1 GB equals 1000 MB.

How many MB are in 2 GB?

2 GB equal 2000 MB.

How do I convert GB to MB?

Multiply the amount in GB by 1000 to get MB.

Is 1 GB equal to 1000 MB or 1024 MB?

On this page we use the decimal (SI) convention: 1 GB = 1000 MB, 1 MB = 1000 KB, and so on. That is what storage manufacturers, Google, and macOS use. The binary (IEC) convention (1 GiB = 1024 MiB), used by Windows and RAM, gives different numbers: 1 GiB = 1.073741824 GB.

Why does my computer show less space?

Hard-drive and SSD makers state capacity in decimal units (1 TB = 1000 GB = 1,000,000,000,000 bytes). Windows, however, counts in binary and reports the same capacity as GiB (dividing by 1024 instead of 1000). So a 1 TB drive shows as about 931 GiB in Windows — no space is missing, it is just a different unit (1 GiB = 1.073741824 GB). macOS has shown decimal GB since OS X 10.6.

What are these data-storage units used for?

Bytes and bits are the smallest units — 1 byte = 8 bits; bits per second measure bandwidth. Kilobytes (KB) and megabytes (MB) describe documents, photos, and songs; gigabytes (GB) and terabytes (TB) describe hard drives, SSDs, and data plans. All values here are decimal (SI).

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