100 GB

To partition your hard disk effectively, you can use specialized calculator tools or built-in Windows features to ensure your drive capacity displays as a clean integer (like exactly ) rather than an uneven number like 99.8 GB . Partition Calculator Tools

Online Partition Calculators

: Web-based tools like Toolpie Disk Calculator or SwitchFirewall Partition Calculator provide the specific MB values needed for standard integer GB sizes.

🧠 Pro Tip: Manual Partition Size Formula (No Software)

Older tools (2009-ish) sometimes start partitions on sector 63 instead of 2048. A modern free partition calculator always outputs MB values that maintain alignment.

If you need to perform the actual resizing, these free programs often include built-in calculators or sliders that snap to even GB values.

⚠️ Avoid softpedia, cnet, or unknown mirrors – download only from official sites.

  • Determine the precise binary size to input when a specific decimal size is required.
  • Calculate the "missing" capacity due to formatting overhead and file system headers (NTFS MFT, FAT tables).