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Storage Capacity Calculator
Find free storage and the percentage of capacity used.
YOUR NUMBERS, MADE CLEAR
⌗Calculate your result
How storage capacity calculator works
Available capacity = total − used. The tool rejects used storage greater than total and reports percentage usage only for a positive capacity.
A practical example
A 1 TB drive with 250 GB used has 750 GB available (75%).
Using this tool
- Replace the example values with your own measurements and units.
- Read the calculated result and any validation message.
- Copy the result for your notes; estimates depend on your inputs.
How should I interpret the result?
Available capacity = total − used. The tool rejects used storage greater than total and reports percentage usage only for a positive capacity.