How Many Megabytes Are in a Gigabyte?
Explore Megabyte
Convert bytes, kilobytes, megabytes, gigabytes, terabytes, and more. Our data storage converter is essential for understanding file sizes, hard drive capacity, and data transfer calculations.
How it works
Data storage uses binary prefixes: each unit is 1,024 times the previous. 1 KB = 1,024 bytes, 1 MB = 1,024 KB, 1 GB = 1,024 MB, 1 TB = 1,024 GB. Drive manufacturers sometimes use decimal (1,000×), which is why a "1 TB" drive shows less in your OS.
Quick reference
Frequently Asked Questions
How many bytes are in a kilobyte?
1 kilobyte (KB) equals 1,024 bytes. Storage is measured in powers of 2, so each step is 1,024× the previous.
How many megabytes are in a gigabyte?
1 gigabyte (GB) equals 1,024 megabytes (MB). A typical smartphone photo is 3–5 MB.
How many gigabytes are in a terabyte?
1 terabyte (TB) equals 1,024 gigabytes (GB). A 1 TB hard drive can store roughly 250,000 photos.
What is the difference between a bit and a byte?
1 byte equals 8 bits. Bits are the smallest unit of data (0 or 1), while bytes are used to measure file and storage sizes.
How many GB is a typical HD movie?
A typical HD (1080p) movie is 4–8 GB. A 4K movie can be 15–25 GB depending on compression.
How much storage does a photo take up?
A JPEG photo from a modern smartphone takes up 3–8 MB depending on resolution and compression. RAW photos from a DSLR or mirrorless camera are typically 20–50 MB each. A 1 GB memory card can hold roughly 200–300 JPEG photos or 20–40 RAW files.
How large is a movie file?
A standard-definition movie (480p) is about 700 MB–1.5 GB. An HD (1080p) movie is typically 4–8 GB. A 4K HDR movie from a streaming service is 15–25 GB. A Blu-ray disc holds up to 50 GB (dual layer), and a 4K Ultra HD Blu-ray holds up to 100 GB.
How many songs fit on 1 GB?
At standard quality (128 kbps MP3, about 1 MB per minute), 1 GB holds roughly 250–300 songs of average 3–4 minute length. At high quality (320 kbps, about 2.4 MB per minute), 1 GB holds about 100–130 songs. Lossless audio (FLAC) files are 20–50 MB per song.
How much internet data does streaming use?
Netflix data usage: standard definition uses about 1 GB per hour, HD (1080p) uses 3 GB per hour, and 4K uses 7–15 GB per hour. Spotify streams music at 24–320 kbps, using roughly 10–150 MB per hour. A video call on Zoom uses about 1.5–2.5 GB per hour in HD.
How much storage does Windows or macOS need?
Windows 11 requires a minimum of 64 GB of storage, but a fresh installation takes about 20–30 GB, with updates growing it over time. macOS Sonoma requires about 26 GB for installation. Most users need at least 256 GB of total storage for comfortable everyday use, with 512 GB or 1 TB recommended for longevity.