File Size Converter

Base Unit

Bytes (B)

Bytes

Decimal Units (Base 1000)

Kilobytes (KB)

Kilobytes

Megabytes (MB)

Megabytes

Gigabytes (GB)

Gigabytes

Terabytes (TB)

Terabytes

Petabytes (PB)

Petabytes

Binary Units (Base 1024)

Kibibytes (KiB)

Kibibytes

Mebibytes (MiB)

Mebibytes

Gibibytes (GiB)

Gibibytes

Tebibytes (TiB)

Tebibytes

Pebibytes (PiB)

Pebibytes

About File Size Converter

Our free online File Size Converter helps you convert between different digital storage units instantly. Whether you're calculating storage requirements, understanding file sizes, or planning data transfers, this tool provides accurate conversions between bytes, KB, MB, GB, TB, and beyond.

Key Features

All Units

Convert between Bytes, KB, MB, GB, TB, and PB.

Real-time Conversion

All units update automatically as you type.

Binary & Decimal

Supports both IEC (1024-based) and SI (1000-based) standards.

100% Client-side

All calculations happen in your browser - your data stays private.

Copy Support

One-click copy for any converted value.

High Precision

Accurate calculations for any file size.

How to Use

1Enter a file size value in any unit field.
2All other unit fields automatically update with converted values.
3Click the copy icon to copy any value.
4Use 'Clear All' to reset all fields.

Pro Tips

💡1 KB = 1024 Bytes (binary) or 1000 Bytes (decimal/SI).
💡Hard drive manufacturers use decimal (1 TB = 1000 GB).
💡Operating systems often use binary (1 TB = 1024 GB).
💡This explains why your 1TB drive shows ~931GB in Windows.