File Size & Data Rate Converter

Convert between decimal SI (KB, MB, GB, TB) and binary IEC (KiB, MiB, GiB, TiB) storage units and estimate download transfer times across network speeds.

Category: File & Data

How to Use File Size & Data Rate Converter

  1. Enter your numeric file or storage size value (e.g., 1024 or 500).
  2. Select the source storage unit (Decimal SI KB/MB/GB/TB or Binary IEC KiB/MiB/GiB/TiB).
  3. Click Process to compute exact equivalents across Bits, Bytes, Decimal, and Binary standards.
  4. Review estimated network transfer times over 25 Mbps 4G/Wi-Fi, 100 Mbps 5G, and 1 Gbps Fiber.

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Frequently Asked Questions

What is the difference between Decimal SI (MB, GB, TB) and Binary IEC (MiB, GiB, TiB) storage units?

Decimal SI units (standardized by the International System of Units and used by SSD/HDD manufacturers) scale by powers of 1,000: 1 MB = 1,000,000 bytes and 1 GB = 1,000,000,000 bytes. Binary IEC units (used by operating systems and RAM allocation) scale by powers of 1,024 (2^10): 1 MiB = 1,048,576 bytes and 1 GiB = 1,073,741,824 bytes.

Why does a 1 TB hard drive show up as roughly 931 GB in Windows?

Drive manufacturers label a 1 Terabyte (TB) drive as 1,000,000,000,000 bytes (10^12 bytes). Windows calculates drive capacity using binary Gibibytes (1024^3 = 1,073,741,824 bytes) even though it labels them 'GB'. Dividing 10^12 bytes by 1024^3 equals 931.32 GiB.

How are network download transfer times calculated from file sizes?

File sizes are measured in Bytes (8 bits per byte), whereas network bandwidth speeds (such as 25 Mbps 4G, 100 Mbps 5G, and 1 Gbps Fiber) are measured in Megabits or Gigabits per second (1 Mbps = 1,000,000 bits/sec). Transfer Time (seconds) = (File Size in Bytes × 8) ÷ Bandwidth in bits per second.

Can I convert 0 bytes or fractional storage sizes like 2.5 GB?

Yes. The converter supports zero (0), whole integers, and decimal floating-point values across Bytes (B), Kilobytes (KB), Kibibytes (KiB), Megabytes (MB), Mebibytes (MiB), Gigabytes (GB), Gibibytes (GiB), Terabytes (TB), and Tebibytes (TiB).