# GB to GiB Convert gigabytes to gibibytes with decimal vs binary interpretation, alternate-system comparison, and network-speed-aware transfer estimates > Canonical page: https://elysiatools.com/en/tools/gb-to-gib - **Category:** Math & Numbers - **Keywords:** data storage, unit conversion, file size, GB, GiB ## Overview The GB to GiB converter allows you to accurately translate decimal gigabytes (GB) to binary gibibytes (GiB) using either SI 1000-based or binary 1024-based unit systems. It provides side-by-side comparisons of storage capacities, custom decimal precision, and network transfer time estimates based on your specified connection speed. ## Inputs - **Value** (text): e.g. 500 - **Unit System** (select) - **Transfer Speed (Mbps, optional)** (number) - **Decimal Precision** (number) ## When to use - When provisioning cloud storage or virtual machine disks where providers define capacities in binary GiB but display them in decimal GB. - When calculating the actual usable space of physical hard drives or SSDs that are marketed in decimal gigabytes. - When estimating how long it will take to transfer a specific data volume over a network connection with a known bandwidth in Mbps. ## How it works - Enter the data volume value in the input field and select the source unit system (Decimal 1000-based or Binary 1024-based). - Optionally input your network transfer speed in Mbps and set the desired decimal precision for the output. - The tool calculates the exact conversion to GiB, compares the alternate-system interpretation, and estimates the network transfer duration. ## Use cases - Cloud resource allocation planning to match local VM disk sizes with cloud provider GiB specifications. - Network bandwidth planning to estimate backup window durations for large data migrations. - Storage hardware verification to reconcile physical drive packaging specs with operating system reports. ## Frequently asked questions ### What is the difference between GB and GiB? A Gigabyte (GB) is base-10 (1,000,000,000 bytes), whereas a Gibibyte (GiB) is base-2 (1,073,741,824 bytes), making a GiB approximately 7.37% larger than a GB. ### Why does my operating system show less storage than the drive label? Drive manufacturers market storage using decimal GB (10^9 bytes), while operating systems like Windows often calculate storage using binary GiB (2^30 bytes), resulting in a lower reported number. ### How does the unit system option affect the conversion? Selecting 'Decimal' treats the input value as standard GB (10^9 bytes) to convert to GiB, while 'Binary-Compatible' treats the input as 1024-based GB to show the equivalent binary conversion. ### Can I estimate download or upload times with this tool? Yes, by entering your network speed in Mbps, the tool calculates the estimated time required to transfer the specified data volume. ### What is the maximum decimal precision supported? 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