Data Size Converter

Convert between bits, bytes, KB, MB, GB, TB, and PB instantly. Also converts Kilobits, Megabits, and Gigabits.

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Frequently Asked Questions

How many MB in a GB?
1 GB = 1,024 MB (binary, used by operating systems) or 1,000 MB (decimal, used by storage manufacturers). This discrepancy is why a '1TB' hard drive shows as ~931 GB in Windows.
What is the difference between Megabits and Megabytes?
1 Byte = 8 bits. Internet speeds are measured in Megabits per second (Mbps), while file sizes use Megabytes (MB). So a 100 Mbps connection transfers 12.5 MB per second. This is why download speeds appear lower than your advertised connection speed.
How large is a 4K movie?
A typical 4K movie is 50–100 GB in high-quality Blu-ray format, or 15–25 GB in compressed streaming format (Netflix/Disney+). A 1080p HD movie is roughly 4–10 GB. A standard DVD (480p) holds about 4.7 GB.
What is a Petabyte?
1 Petabyte = 1,024 Terabytes = 1,048,576 Gigabytes. To put it in perspective: 1 PB could store approximately 250,000 HD movies or 20 million 4-drawer filing cabinets full of text.