OneDrive storage tool
Microsoft 365 Storage Plan Calculator
Estimate total pooled storage requirements from user count, per-user allocation and growth reserve.
Recommended planned capacity
4.4 TB
- Base allocation
- 3,750 GB
- Growth reserve
- 750 GB
Base allocated storage
Recommended reserve
Planned total capacity
How it works
A useful answer in three clear steps.
- 1
Enter licensed user count
Complete this check before moving to the next decision.
- 2
Set an expected GB allocation per user
Complete this check before moving to the next decision.
- 3
Add a percentage reserve for growth
Verify the final result against your current cloud drive or organizational policy.
Frequently asked questions
Before you use this tool
Is the Storage Plan Calculator free to use?
Yes. You can use this tool in the browser without creating an account or installing software.
How accurate is the Storage Plan Calculator?
The arithmetic uses the values you provide. Its usefulness depends on whether those inputs represent the real drive, team or transfer conditions, so treat the result as a planning estimate.
Can this tool delete or change my cloud-drive files?
No. This page does not connect to your cloud account and cannot rename, move or delete files. It produces an estimate, analysis or checklist for you to review.
What should I do after using the Storage Plan Calculator?
Add a percentage reserve for growth. Confirm current Microsoft licensing and pooled-storage rules before purchasing or changing plans.
Keep exploring
Related storage planning tools
Storage Usage Calculator
Calculate used, free and percentage-used OneDrive storage from your quota figures.
Storage Growth Forecast
Project future OneDrive usage from current storage and average monthly growth.
Storage Full-Date Calculator
Estimate when a OneDrive quota will be full at the current monthly growth rate.
Ready to measure duplicate storage with real data?
Choose OneDrive or Dropbox for a read-only scan, then review exact fingerprint matches before any cleanup decision.