Convert between bytes, KB, MB, GB, TB, and more in SI (decimal, powers of 1000) or IEC (binary, powers of 1024) notation.
Choose between decimal manufacturer ratings (SI) or exact binary standards (IEC).
Understand the difference between storage hardware ratings and operating system calculations.
Hard drive and flash storage manufacturers measure capacity using decimal multipliers (1 KB = 1,000 bytes), while operating systems traditionally compute memory using binary multipliers (1 KiB = 1,024 bytes). This discrepancy explains why a 1 TB hard drive often appears as ~931 GiB in Windows or macOS.
Seamlessly toggle between powers of 1000 (SI) and powers of 1024 (IEC) with absolute mathematical accuracy.
Accurately determine real-world disk capacities advertised by SSD, HDD, and flash drive vendors.
Copy converted amounts directly into your active clipboard with a single click for fast documentation.
Calculations execute instantly inside your browser. No files or metrics ever leave your device.
Match file sizes reported by Linux, macOS, and Windows file managers without manual math.
Fully responsive layout adapts seamlessly across desktop workstations, tablets, and smartphones.
Got questions about the File Size Converter? Find quick answers below.
Yes, our File Size Converter tool is 100% free to use on UtilityGlen with no hidden fees, subscriptions, or usage limits required.
No, your data never leaves your browser. All generation and calculations are executed locally on your device for total privacy.
Yes, our File Size Converter tool is fully responsive and optimized to work seamlessly on smartphones, tablets, and desktop browsers alike.
Handy web tools for daily use. Everything runs right in your browser—no sign-ups, no cloud uploads, and your data stays entirely on your device.