Convert between Bytes, KB, MB, GB, and TB, and calculate estimated download times across 4G, 5G, and fiber.
Understand storage capacity and data transfer speeds. Calculate download durations across mobile and gigabit fiber networks.
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The File Size Converter converts digital storage quantities across decimal (SI, base 10) and binary (IEC, base 2) unit systems. In technology, storage manufacturers measure capacity in decimal units (1 Gigabyte = 1,000 Megabytes = 1,000,000,000 bytes), whereas computer operating systems (Windows, Linux, macOS) calculate storage in binary powers of two (1 Gibibyte = 1,024 Mebibytes = 1,073,741,824 bytes). This tool resolves this discrepancy and calculates download/upload transfer durations across varying network bandwidths.
Calculate exact gigabyte to terabyte requirements when provisioning AWS S3 buckets, Google Cloud Storage, or Cloudflare R2.
Example: Determining that 500,000 images averaging 450 KB will require approximately 225 GB of cloud storage.
Estimate how long video or backup files will take to transfer over different network bandwidth speeds (e.g. 50 Mbps vs 1 Gbps).
Example: Calculating that a 4.5 GB operating system ISO will take approximately 6 minutes on a 100 Mbps broadband connection.
Understand why a purchased 1 TB hard drive reports as approximately 931 GiB in Windows operating systems.
Example: Converting 1,000,000,000,000 bytes into both 1.00 TB (decimal) and 931.32 GiB (binary gibibytes).
Storage drive manufacturers market capacity using the decimal SI system where 1 TB = $10^{12}$ bytes (1,000,000,000,000 bytes). Windows calculates capacity using the binary IEC standard where 1 GiB = $2^{30}$ bytes ($1,073,741,824$ bytes). Dividing $10^{12}$ by $2^{30}$ yields approximately 931.32 GiB.
A bit (b) is a single binary digit (0 or 1), while a Byte (B) consists of 8 bits. Internet speeds are quoted in bits (e.g., 100 Mbps), whereas file sizes are measured in Bytes (e.g., 100 MB). A 100 Mbps connection transfers a maximum of 12.5 MB of data per second.
In 1998, the International Electrotechnical Commission (IEC) established binary prefixes—Kibibyte (KiB = 1,024 B), Mebibyte (MiB = $1,024^2$ B), and Gibibyte (GiB = $1,024^3$ B)—to eliminate confusion with decimal SI metric prefixes (KB = 1,000 B, MB = $1,000^2$ B).
Transfer time is calculated by dividing total file size in bits by the sustained bandwidth speed in bits per second, factoring in standard TCP/IP protocol overhead.
No. All calculations are executed locally using client-side JavaScript arithmetic.