Byte/Bit Converter
Free online Byte Converter to convert between bytes, KB, MB, GB, TB, and bits instantly.
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The Byte Converter instantly converts between bytes, kilobytes, megabytes, gigabytes, terabytes, and bits. Whether you're sizing files, planning storage, or estimating download times, it gives you the exact figure — and clears up the decimal-versus-binary confusion that makes drives look "smaller" than advertised.
The Units of Digital Data
Everything digital is measured in bytes, scaling up through kilo, mega, giga, and tera. The catch is that there are two systems for these prefixes, and mixing them up causes most data-size confusion. This converter handles both cleanly so your numbers mean what you think they mean.
How to Convert
- Enter the data size.
- Choose the from and to units.
- Read the converted result instantly.
Decimal vs. Binary: The Source of Confusion
| Unit | Decimal (SI) | Binary |
|---|---|---|
| 1 KB / KiB | 1,000 bytes | 1,024 bytes |
| 1 MB / MiB | 1,000,000 | 1,048,576 |
| 1 GB / GiB | 1,000,000,000 | 1,073,741,824 |
This table explains the classic "missing space" mystery. A drive sold as 1 TB holds 1,000,000,000,000 bytes (decimal), but your operating system divides by 1,073,741,824 per GiB, so it displays about 931 GiB. Nothing vanished — the two systems simply count differently.
Bits vs. Bytes: The Download Trap
Here's the conversion that surprises everyone. A byte is 8 bits. Storage is measured in bytes, but internet speeds are quoted in bits per second. So a "100 Mbps" connection actually downloads at about 12.5 megabytes per second — divide the advertised bit rate by 8 to get the real-world file speed. Knowing this turns vague plan numbers into accurate download-time estimates.
Who Uses a Byte Converter
- Developers reasoning about file and payload sizes.
- IT and sysadmins planning storage and backups.
- Anyone comparing advertised vs. actual drive capacity.
- Users estimating download times from a speed plan.
Accurate and Free
The converter applies exact decimal and binary factors at full precision, right in your browser. Convert as often as you need, free.
Frequently Asked Questions
How many bytes are in a kilobyte?
It depends on the standard. In the decimal (SI) system, 1 KB = 1,000 bytes. In the binary system used by many operating systems, 1 KiB = 1,024 bytes. This difference is why a drive's advertised size looks smaller in your file manager.
Why does my hard drive show less space than advertised?
Manufacturers measure storage in decimal units (1 GB = 1,000,000,000 bytes), while operating systems often display binary units (1 GiB = 1,073,741,824 bytes). The same drive therefore shows a smaller number on your computer — nothing is missing, it's just a unit mismatch.
What is the difference between a bit and a byte?
A byte is 8 bits. Storage (files, drives) is measured in bytes, while data transfer speeds (internet plans) are usually measured in bits per second. That's why a '100 Mbps' connection downloads at about 12.5 megabytes per second.
How do I convert megabytes to gigabytes?
Divide megabytes by 1,000 (decimal) or 1,024 (binary). For example, 5,000 MB is 5 GB in decimal terms. The converter lets you pick the standard so the result matches your context.
Which standard should I use?
Use decimal (KB, MB, GB) for storage marketing and networking, and binary (KiB, MiB, GiB) when matching what an operating system reports. Being explicit about which you mean avoids confusion.
Why convert bits to bytes for downloads?
Internet speeds are quoted in bits per second, but file sizes are in bytes. Dividing your connection's bit rate by 8 tells you the real download speed in bytes, so you can estimate how long a file will take.
Is the conversion accurate?
Yes. The tool applies exact factors for both decimal and binary standards at full precision.
Is this tool free?
Yes — free, instant, and unlimited, with no signup.