1 Megabyte equals 0.001 Gigabytes.
| Megabyte (MB) | Gigabyte (GB) |
|---|---|
| 1 MB | 0.001 GB |
| 2 MB | 0.002 GB |
| 4 MB | 0.004 GB |
| 8 MB | 0.008 GB |
| 16 MB | 0.016 GB |
| 32 MB | 0.032 GB |
| 64 MB | 0.064 GB |
| 128 MB | 0.128 GB |
| 256 MB | 0.256 GB |
| 512 MB | 0.512 GB |
| 1,024 MB | 1.024 GB |
| 2,048 MB | 2.048 GB |
To convert Megabytes to Gigabytes, multiply the value by 0.001. This factor comes from the ratio of the two units' definitions: one Megabyte equals 0.001 Gigabytes.
For example: 1 Megabyte = 0.001 Gigabytes, and 10 Megabytes = 0.01 Gigabytes.
To convert in the reverse direction — from Gigabytes to Megabytes — multiply by 1,000.
A megabyte (MB) in the SI convention equals exactly 1,000,000 bytes (10⁶ bytes). The "mega" prefix follows standard SI usage. A megabyte is enough to store a short novel in plain text (about 500,000 characters), a high-quality music file of about one minute, or a moderate-resolution photograph. The megabyte was the practical unit of storage through the 1980s and 1990s, when hard drives ranged from tens to hundreds of megabytes and RAM was measured in single-digit megabytes.
Digital photography makes the megabyte immediately tangible. A JPEG image from a smartphone camera might be 2–5 MB; a RAW file from a professional camera is 20–50 MB. A 1-minute MP3 audio file at 128 kbps takes about 1 MB; CD-quality audio (uncompressed) takes about 10 MB per minute. An hour-long film at standard definition (compressed) is 700–1,400 MB — the capacity of a single-layer DVD, which holds 4,700 MB.
In network speed discussions, megabytes and megabits are frequently confused. Internet speed is marketed in megabits per second (Mbps), while file sizes are in megabytes (MB). Since 1 byte = 8 bits, a 100 Mbps connection downloads at most 12.5 MB per second — meaning a 1,000 MB (1 GB) file takes at least 80 seconds at full speed. Keeping this distinction clear matters whenever you're calculating download times or estimating bandwidth requirements.
A gigabyte (GB) in the SI convention equals exactly 1,000,000,000 bytes (10⁹ bytes). The everyday unit of personal computing storage and RAM, the gigabyte has gone from extraordinary to ordinary in under three decades: in 1991, a 1 GB hard drive cost around $3,000 and was considered massive; today, 1 GB is a modest fraction of a smartphone's storage. Modern computers typically have 8–32 GB of RAM and hundreds of gigabytes of SSD storage.
Digital media files that define the gigabyte era: a feature film at 1080p takes 4–15 GB; a video game installation might require 50–100 GB; a 4K Blu-ray disc holds up to 100 GB; and an hour of 4K video shot on a professional camera can fill 50–200 GB. Streaming services compress content dramatically — Netflix streams 4K at about 7 GB/hour — but the underlying uncompressed files are far larger.
Mobile data plans are measured in gigabytes: "10 GB per month" is a typical moderate plan for a smartphone user in many countries. Cloud storage services offer gigabytes of free space (Google Drive gives 15 GB; Dropbox gives 2 GB free). Database sizes for small to medium businesses are typically in the gigabyte range; large enterprise databases reach into the terabytes. The gigabyte thus sits at the sweet spot of human-scale digital data — large enough to matter, small enough to count.
1 Megabyte equals 0.001 Gigabytes.
To convert Megabytes to Gigabytes, multiply by 0.001. For example, 100 Megabytes = 0.1 Gigabytes.
1 Gigabyte equals 1,000 Megabytes.