File Size Calculator
Convert file sizes between units, calculate download times based on connection speeds, and estimate storage requirements.
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What is File Size Calculator?
A file size calculator converts between bytes, kilobytes, megabytes, gigabytes, and larger units. Choose binary (1024) or decimal (1000) calculations for accurate storage planning.
Key Benefits
- All units
- Binary/decimal
- Instant conversion
- Storage planning
Common Use Cases
- •Storage planning
- •Bandwidth calculation
- •Upload limits
- •Backup sizing
How to Calculate File Sizes
- Enter size: Type the file size value.
- Select unit: Choose bytes, KB, MB, GB, etc.
- View conversions: All unit conversions display.
- Copy result: Copy the size you need.
Key Features
- Calculate total file sizes
- Binary and decimal conversions
- Storage planning calculator
- Download time estimation
- Compression savings estimate
- Compare storage options
Frequently Asked Questions
What units can I convert between?
Convert between bytes, KB, MB, GB, TB, PB, using either binary (1024) or decimal (1000) calculations.
What is the difference between KB and KiB?
KB (kilobyte) = 1000 bytes (decimal). KiB (kibibyte) = 1024 bytes (binary). Same applies to MB/MiB, GB/GiB.
Which system do operating systems use?
Windows shows binary (1024) but labels as KB/MB. Mac and Linux use decimal (1000) for storage displays.
How do I calculate storage needs?
Multiply file size by quantity. Account for filesystem overhead—actual usage is typically 5-10% more.