How do you convert MB to GB?
Divide the number of megabytes by 1,000, per the SI convention used by drive manufacturers and mobile plans. Windows counts in base 1,024 (gibibytes, GiB) instead, which is why a "1 TB" drive shows up as 931 "GB": both systems coexist.
MB = GB × 1,000
Common file sizes
| 1 MB (document) | 0.001 GB |
| 5 MB (photo) | 0.005 GB |
| 50 MB | 0.05 GB |
| 100 MB | 0.1 GB |
| 500 MB | 0.5 GB |
| 700 MB (CD) | 0.7 GB |
| 1,000 MB | 1 GB |
| 4,700 MB (DVD) | 4.7 GB |
| 8,500 MB (dual-layer DVD) | 8.5 GB |
| 25,000 MB (Blu-ray) | 25 GB |
| 50,000 MB | 50 GB |
Show every value
- 1 MB = 0.001 GB
- 2 MB = 0.002 GB
- 3 MB = 0.003 GB
- 4 MB = 0.004 GB
- 5 MB = 0.005 GB
- 6 MB = 0.006 GB
- 7 MB = 0.007 GB
- 8 MB = 0.008 GB
- 9 MB = 0.009 GB
- 10 MB = 0.01 GB
- 11 MB = 0.011 GB
- 12 MB = 0.012 GB
- 13 MB = 0.013 GB
- 14 MB = 0.014 GB
- 15 MB = 0.015 GB
- 16 MB = 0.016 GB
- 17 MB = 0.017 GB
- 18 MB = 0.018 GB
- 19 MB = 0.019 GB
- 20 MB = 0.02 GB
- 21 MB = 0.021 GB
- 22 MB = 0.022 GB
- 23 MB = 0.023 GB
- 24 MB = 0.024 GB
- 25 MB = 0.025 GB
- 26 MB = 0.026 GB
- 27 MB = 0.027 GB
- 28 MB = 0.028 GB
- 29 MB = 0.029 GB
- 30 MB = 0.03 GB
- 31 MB = 0.031 GB
- 32 MB = 0.032 GB
- 33 MB = 0.033 GB
- 34 MB = 0.034 GB
- 35 MB = 0.035 GB
- 36 MB = 0.036 GB
- 37 MB = 0.037 GB
- 38 MB = 0.038 GB
- 39 MB = 0.039 GB
- 40 MB = 0.04 GB
- 41 MB = 0.041 GB
- 42 MB = 0.042 GB
- 43 MB = 0.043 GB
- 44 MB = 0.044 GB
- 45 MB = 0.045 GB
- 46 MB = 0.046 GB
- 47 MB = 0.047 GB
- 48 MB = 0.048 GB
- 49 MB = 0.049 GB
- 50 MB = 0.05 GB
- 51 MB = 0.051 GB
- 52 MB = 0.052 GB
- 53 MB = 0.053 GB
- 54 MB = 0.054 GB
- 55 MB = 0.055 GB
- 56 MB = 0.056 GB
- 57 MB = 0.057 GB
- 58 MB = 0.058 GB
- 59 MB = 0.059 GB
- 60 MB = 0.06 GB
- 61 MB = 0.061 GB
- 62 MB = 0.062 GB
- 63 MB = 0.063 GB
- 64 MB = 0.064 GB
- 65 MB = 0.065 GB
- 66 MB = 0.066 GB
- 67 MB = 0.067 GB
- 68 MB = 0.068 GB
- 69 MB = 0.069 GB
- 70 MB = 0.07 GB
- 71 MB = 0.071 GB
- 72 MB = 0.072 GB
- 73 MB = 0.073 GB
- 74 MB = 0.074 GB
- 75 MB = 0.075 GB
- 76 MB = 0.076 GB
- 77 MB = 0.077 GB
- 78 MB = 0.078 GB
- 79 MB = 0.079 GB
- 80 MB = 0.08 GB
- 81 MB = 0.081 GB
- 82 MB = 0.082 GB
- 83 MB = 0.083 GB
- 84 MB = 0.084 GB
- 85 MB = 0.085 GB
- 86 MB = 0.086 GB
- 87 MB = 0.087 GB
- 88 MB = 0.088 GB
- 89 MB = 0.089 GB
- 90 MB = 0.09 GB
- 91 MB = 0.091 GB
- 92 MB = 0.092 GB
- 93 MB = 0.093 GB
- 94 MB = 0.094 GB
- 95 MB = 0.095 GB
- 96 MB = 0.096 GB
- 97 MB = 0.097 GB
- 98 MB = 0.098 GB
- 99 MB = 0.099 GB
- 100 MB = 0.1 GB
- 125 MB = 0.125 GB
- 150 MB = 0.15 GB
- 175 MB = 0.175 GB
- 200 MB = 0.2 GB
- 225 MB = 0.225 GB
- 250 MB = 0.25 GB
- 275 MB = 0.275 GB
- 300 MB = 0.3 GB
- 325 MB = 0.325 GB
- 350 MB = 0.35 GB
- 375 MB = 0.375 GB
- 400 MB = 0.4 GB
- 425 MB = 0.425 GB
- 450 MB = 0.45 GB
- 475 MB = 0.475 GB
- 500 MB = 0.5 GB
- 550 MB = 0.55 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
- 1,000 MB = 1 GB
- 1,500 MB = 1.5 GB
- 2,000 MB = 2 GB
- 2,500 MB = 2.5 GB
- 3,000 MB = 3 GB
- 3,500 MB = 3.5 GB
- 4,000 MB = 4 GB
- 4,500 MB = 4.5 GB
- 5,000 MB = 5 GB
- 5,500 MB = 5.5 GB
- 6,000 MB = 6 GB
- 6,500 MB = 6.5 GB
- 7,000 MB = 7 GB
- 7,500 MB = 7.5 GB
- 8,000 MB = 8 GB
- 8,500 MB = 8.5 GB
- 9,000 MB = 9 GB
- 9,500 MB = 9.5 GB
- 10,000 MB = 10 GB
SI prefixes: 1 GB = 10⁹ bytes = 1,000 MB. Binary prefixes (1 GiB = 2³⁰ bytes = 1,024 MiB) have been standardised separately by the IEC since 1998. IEC standard 80000-13 sets this decimal definition and reserves the binary prefixes Ki, Mi and Gi for powers of 1024. Methodology & sources.
Frequently asked questions
Why does my 1 TB drive show only 931 GB in Windows?
The manufacturer counts in base 10 (1 TB = 1,000 billion bytes) while Windows displays base-1,024 units (1 shown "GB" = 1 GiB = 1.074 billion bytes). 10¹² ÷ 2³⁰ ≈ 931: no space is missing, only the display unit differs.
Are MB and Mb the same?
No: MB (megabyte) is 8 times larger than Mb (megabit). Internet speeds are sold in megabits per second, so an 800 Mb/s fiber line downloads about 100 MB per second.
How many photos fit in 1 GB?
Roughly 200 smartphone photos at 5 MB each, or 60 to 80 camera RAW files. One hour of HD streaming uses about 3 GB.
Does a 16 GB memory stick really hold 16 billion bytes?
No, it holds 17,179,869,184, because RAM is the one component that stayed binary: its address lines can only produce powers of two. A RAM GB is therefore a gibibyte, 7.4 % more than a disk gigabyte. The same symbol covers two different quantities depending on the part.
Why does the same drive read 1 TB on a Mac and 931 GB on Windows?
Because Apple moved to decimal units with Mac OS X 10.6 Snow Leopard, released on 28 August 2009: the Finder divides by 10⁹ and lands back on the manufacturer's figure. Windows kept dividing by 2³⁰ while still writing GB. Same drive, both readings correct, only the definition of the gigabyte differs.