THE NUMBERS, EXPLAINED
How to use this calculator.
Sequential throughput estimate excluding scanning, compression CPU time and seek overhead.
Start with your inputs
Enter data to back up (gb), sustained throughput (mb/s). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Data to back up (GB) | 500 |
| Sustained throughput (MB/s) | 100 |
A worked example
With the example inputs above, backup hours is 1.388889. Change the inputs to explore your own scenario.
Putting the example numbers into the formula
Backup hours
(500) × 1000 ÷ (100) ÷ 3600 = 1.388889
| Result | Example answer |
|---|---|
| Backup hours | 1.388889 |
How this is calculated
Backup hours
a × 1000 ÷ b ÷ 3600
Symbols and units
- a
- Data to back up (GB)
- b
- Sustained throughput (MB/s)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions and limits
Sequential throughput estimate excluding scanning, compression CPU time and seek overhead.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
Backup hours. The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Sequential throughput estimate excluding scanning, compression CPU time and seek overhead.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
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