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What is a byte?

The basic file-size and memory unit — 8 bits

Definition

The byte equals 8 bits — the basic unit of file size and memory. One byte encodes one ASCII character. All file sizes and RAM capacities are quoted in bytes and their multiples (KB, MB, GB, TB).

Common uses

  • File sizes everywhere (documents, images, video)
  • RAM and storage capacity
  • Character encoding in programming

🌍 Real-world scale

An ASCII character: 1 byte. A short text message: few hundred bytes. Uncompressed photo: few MB.

Convert from bytes

7 conversions
Byte to Bit1 B = 8 bByte to Kilobyte1 B = 0.001 KBByte to Megabyte1 B = 1.0000e-6 MBByte to Gigabyte1 B = 1.0000e-9 GBByte to Terabyte1 B = 1.0000e-12 TBByte to Petabyte1 B = 1.0000e-15 PBByte to Megabit per Second1 B = 8.0000e-6 Mbps

Convert to bytes

7 conversions
Bit to Byte1 b = 0.125 BKilobyte to Byte1 KB = 1,000 BMegabyte to Byte1 MB = 1,000,000 BGigabyte to Byte1 GB = 1,000,000,000 BTerabyte to Byte1 TB = 1,000,000,000,000 BPetabyte to Byte1 PB = 1.0000e15 BMegabit per Second to Byte1 Mbps = 125,000 B

Tips

  • 1 byte = 8 bits.
  • KB, MB, GB are 1000 or 1024 multiples of bytes — check context.
  • Use bytes (B) for storage; bits (b) for bandwidth.

Common mistakes

  • Confusing byte (B) with bit (b).
  • Assuming 1 MB always equals 1,048,576 bytes — sometimes 1,000,000.
  • Mixing file size (bytes) with transfer speed (bits per second).

FAQ about the byte

What is a byte?
The byte equals 8 bits — the basic unit of file size and memory. One byte encodes one ASCII character. All file sizes and RAM capacities are quoted in bytes and their multiples (KB, MB, GB, TB).
Where is the byte used?
The byte is commonly used for: File sizes everywhere (documents, images, video); RAM and storage capacity; Character encoding in programming.
What is an example of a byte in real life?
An ASCII character: 1 byte. A short text message: few hundred bytes. Uncompressed photo: few MB.
What category does the byte belong to?
The byte is a unit of data, part of the 8-unit data category on UnitConv.
How accurate are byte conversions?
All conversion factors follow NIST and BIPM international standards to 8 significant figures — the highest practical accuracy.
Explore all 8 data units and their conversions.💾 Data hub →