Availability Percentage
Time-based availability measures the share of an observation window without counted downtime.
Availability Percentage
Reliability · 2 inputs
How to use this calculator
- Enter observed time in minutes.
- Enter downtime in minutes.
- Select Calculate and keep the output unit with the answer.
Before you use the answer
Write down whether a size uses decimal or binary prefixes and whether a rate counts bits or bytes. Compare the same system boundary on both sides of a performance calculation. Measured throughput is usually a more useful planning input than the maximum number on a product label.
Define downtime and exclusions consistently before comparing availability figures.
Does it save my inputs?
No calculation history is stored by this website. The calculator works locally in your browser. See the privacy policy for hosting and contact details.
Why might a result be approximate?
Measurement uncertainty, ideal-model assumptions and floating-point rounding can all matter. Displaying more digits does not improve the original measurement.
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An availability target translates into a downtime budget for a chosen window.
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