File Size Calculator
Convert between bytes, KB, MB, GB, TB and bits instantly
Storage Units (binary, ×1024)
Network / Bit Units (decimal, ×1000)
Click any row to copy the value
About the File Size Converter
This file size converter moves between bytes, KB, MB, GB and TB, and shows both the decimal and binary interpretations. That distinction is why a "500 GB" drive shows up as roughly 465 GB in your operating system.
A file size converter answers the everyday question of whether something fits — under an email limit, within a hosting quota, or on a given drive. Sizes are quoted in different units by different tools, so converting is constant.
The decimal-versus-binary split is the interesting part. Storage manufacturers use decimal units where a kilobyte is 1,000 bytes; operating systems traditionally use binary units where it is 1,024. The gap compounds with scale, reaching about 7% by the terabyte — which is the entire explanation for the "missing" space on a new drive.
The formally correct binary names are KiB, MiB and GiB, though almost nobody uses them consistently. Both interpretations are shown here so you can tell which one a given number came from.
How to use the File Size Converter
- Enter the size. Type the value you have.
- Set the input unit. Choose bytes, KB, MB, GB or TB.
- Read the conversions. See the equivalent in every other unit.
- Compare decimal and binary. Check both interpretations to see which matches your source.
File Size Converter features
- Multiple storage units
- Bytes KB MB GB TB conversion
- Bit units support
- Real-time calculation
- Storage planning focus
- Data management
- Professional accuracy
- IT infrastructure tool
- Cloud storage calculator
- Digital storage essential
Frequently asked questions
What storage units are supported?
Comprehensive support for: Bytes, Kilobytes (KB), Megabytes (MB), Gigabytes (GB), Terabytes (TB), Petabytes (PB), and bit units (Kilobits, Megabits, Gigabits, Terabits) for complete storage conversion needs.
How does file size conversion work?
Uses standard conversion factors: 1 KB = 1024 Bytes, 1 MB = 1024 KB, 1 GB = 1024 MB for binary units. For bits: 1 Kilobit = 1000 bits following decimal standards. Provides accurate conversions for storage planning.
What's the difference between bytes and bits?
Bytes are 8-bit units used for file storage and memory. Bits are single binary digits used for network speeds and data transfer. Our tool handles both units with proper conversion factors for different use cases.
What are the applications of file size calculation?
Essential for: storage planning, bandwidth calculation, data transfer estimation, cloud storage management, backup planning, database sizing, and understanding digital storage requirements across IT infrastructure.
How can this help with storage planning?
Critical for planning: calculating storage needs, estimating backup requirements, planning cloud storage budgets, understanding data growth, optimizing storage allocation, and managing digital asset libraries efficiently.
What are common file size references?
Useful references: 1 MB ≈ 500 document pages, 1 GB ≈ 200 MP3 songs, 1 TB ≈ 250 HD movies, 1 PB ≈ 500,000 hours of video. Helps visualize storage requirements for planning and budgeting.
Is this suitable for professional IT management?
Absolutely! Professional-grade calculator suitable for IT administrators, system architects, data managers, and cloud engineers. Perfect for infrastructure planning, storage optimization, and data management workflows.