MB

What is the opposite of MB? Here is what we hold, with its meaning and related words.

Abbreviation — Megabyte: a unit of digital storage equal to one million bytes, or 1,048,576 bytes when counted in binary. Used for file sizes, memory and data allowances.

Synonyms by Meaning

1. abbreviation

Megabyte: a unit of digital storage equal to one million bytes, or 1,048,576 bytes when counted in binary. Used for file sizes, memory and data allowances.

“The photo is about 4 MB, so it should attach fine.”

megabyte

2. abbreviation

Megabit, when written with a lower-case b as Mb. One megabit is one eighth of a megabyte and is used mainly for connection speeds.

“The line syncs at 80 Mb per second.”

megabit

3. abbreviation slang

My bad: a short written apology admitting a small mistake.

“Sent it to the wrong thread, mb.”

my bad sorry my fault

How to use MB

The word patterns that sound natural to a native speaker.

MB of storage file size in MB MB per second

The storage sense is neutral and technical; the "my bad" sense is slang and belongs only in casual messages.

Etymology

An initialism of megabyte, from the prefix mega- (Greek megas 'great') plus byte.

Full origin of MB →

Frequently asked questions

What is the difference between MB and Mb?

Capital B means bytes and lower-case b means bits, and there are eight bits in a byte. So 100 Mb per second of broadband delivers roughly 12.5 MB of files per second.

How many MB are in a GB?

1,024 MB in a gigabyte when counted in binary, or 1,000 MB under the decimal system that storage manufacturers and network operators use. That difference is why a drive sold as 500 GB shows up as slightly less on your computer.

What does mb mean in a text message?

In casual messaging, lower-case "mb" is usually short for "my bad", a quick way of admitting a small mistake. Context makes it clear, since nobody apologises in megabytes.

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Nearby words

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