File Size Calculator

How to Use File Size Calculator

1. Upload any file to automatically read its exact size or type a custom number.
2. View instant conversions across decimal (KB, MB, GB) and binary (KiB, MiB, GiB) standards.
3. Inspect estimated download and upload times across 1Gbps Fiber, 5G, 100Mbps, 4G, and 3G networks.

Key Features & Advantages

• Dual unit systems: Decimal (1000 Bytes = 1 KB) & Binary IEC (1024 Bytes = 1 KiB)
• Network transfer time estimator across 8 common internet connection speeds
• Storage media requirement comparison (CD, DVD, Flash Drives, Cloud)
• Upload file inspector or manual input mode

Frequently Asked Questions