EVERYDAY CLARITY
Storage Capacity Calculator
Calculate remaining capacity and used percentage from supplied storage amounts.
Your result
Free storage
GB
Storage used
%
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Total capacity (GB) | Enter total capacity in GB; use the same basis as the other measurements. |
| Used storage (GB) | Enter used storage in GB; use the same basis as the other measurements. |
Understanding your result
Read Free storage (GB), Storage used (%) in the units and model stated on this page. The formula free = capacity - used · percentUsed = 100 * used / capacity defines the relationship; measurement accuracy and model applicability are separate from numerical precision.
Common mistakes
- Mixing input units or changing the physical meaning of a variable without changing the model.
Check your calculation
- Use the worked example as a known reference case, then change one input at a time and check the direction and units of the response.
Calculation checks, sources and review limits
How much storage is left and what percentage is used?
Calculate remaining capacity and used percentage from supplied storage amounts.
Common uses
- How much storage is left and what percentage is used
How it works
free = capacity - used; percentUsed = 100 * used / capacity
Worked example
Enter Total capacity: 1000 GB; Used storage: 750 GB. Results: Free storage: 250 GB; Storage used: 75 %.