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Hard Disk Integer Partition Calculator
Calculate NTFS and FAT32 integer partition sizes using traditional cylinder rounding
Enable JavaScript to use the interactive controls. Your guide and examples are available below.
Features
- Enter a partition capacity in G
- Calculate NTFS and FAT32 allocations in MiB
- Legacy 255-head/63-sector cylinder reference
- Copy results and compare modern 1 MiB alignment
About Hard Disk Integer Partition Calculator
Calculate the legacy Windows integer GB partition values for NTFS and FAT32 in MiB.
How to use it
- Enter a partition capacity in G; decimals are truncated to a whole G to match the legacy calculation.
- Select Calculate or press Enter to see NTFS and FAT32 allocation sizes in MiB.
- Copy the sizes and check the partitioning tool’s filesystem overhead and alignment.
Try Integer Partition Calculator
Calculate a reference size of 100 GiB without changing a disk.
Processing and limitations
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The legacy 100 G calculation gives NTFS 102407 MiB and FAT32 102796 MiB. This tool does not modify a disk.
Questions and answers
What can I do with Integer Partition Calculator?
Legacy NTFS cylinder rounding, FAT32 adjustment and modern exact MiB reference.
Where is my input processed?
The main operations run in your browser. Device models may require a first-use download; browser storage and resource limits apply.
What should I check before using the result?
Does not partition a disk; filesystem metadata and modern tooling differ.
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