Data Size Converter
Convert between bit, byte, KB, MB, GB, TB and PB. Switch between binary (1024) and decimal (1000) conventions to answer "how many MB in 1GB?" accurately.
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Converted values
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Data Size Converter
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How to use
- 1
Enter a value
Type the data size you want to convert.
- 2
Pick the unit
Select the unit of the entered value (bit to PB).
- 3
Check the results
Conversions to every unit appear instantly.
Features
- Convert across 7 units from bit to PB
- Switch between binary (1024) and decimal (SI) with one click
- Converts to every unit in real time as you type
- Your value is never sent to a server
Use cases
Check storage capacity
Answer questions like "how many MB is a 512GB SSD?" or make sense of OS capacity displays.
Measure mobile data plans
Convert "30GB plan" into MB, or check how much of your remaining data you can still use.
Check transfer and attachment limits
Convert limits such as a 25MB email attachment cap into KB or other units.
Details
Data size conversion is confusing because "how many bytes is 1KB" has two answers. This tool lets you switch between the binary convention (1024) used by operating systems and the decimal (SI) convention used in storage product labeling, so both notations are handled correctly.
In the binary convention, 1GiB = 1024MiB = about 1.07 billion bytes. In decimal notation, 1GB = 1000MB = exactly 1 billion bytes. Units, formatting, the OS and existing files can affect displayed or available capacity; conversion alone cannot diagnose a defect.
The tool supports bits, bytes, decimal kB–PB and binary KiB–PiB, converting to every unit in real time as you type. Everything runs in your browser - the value you enter is never sent to a server.
FAQ
How many MB is 1GB?
1GB is 1000MB. In binary units, 1GiB is 1024MiB. Switching the tool base changes the labels and the meaning of the input unit.
What is the difference between KB and KiB?
KiB explicitly means 1024 bytes (binary). The SI symbol kB means 1000 bytes but is commonly used to mean 1024 as well. To avoid confusion, pick the base that matches your context.
What is the difference between Mbps and MB?
Mbps is megabits per second (bits), while MB is megabytes (bytes). Since 1 byte = 8 bits, a 100Mbps connection transfers up to 12.5MB per second in theory.
Are my numbers saved anywhere?
No. Everything is converted in your browser and nothing is stored or sent.
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Verified: Value/unit/base switching, results, errors and copy are covered by browser tests
Did you know?
Storage vendors label 1GB as 1000MB (SI), while operating systems count 1GB as 1024MB (binary) - that is where the two conventions come from.