PrismKitCalculatorsDisk Capacity CalculatorDisk Capacity CalculatorRuns in your browserLocalCopy linkMarkdownSee how much space a TB or GB drive really shows in your OS, with filesystem overhead and a table of common sizes.Download Time CalculatorWork out how long a file takes to transfer at a given connection speed, or the speed needed to finish in time.ZFS Pool CalculatorCalculate raw and usable ZFS pool capacity for stripe, mirror and RAIDZ vdev layouts, with slop space and fault tolerance.