EVERYDAY CLARITY
Uptime Calculator
Calculate time-based availability from an observation window and downtime.
Your result
Uptime
%
Uptime duration
s
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Observation window (s) | Enter observation window in s; use the same basis as the other measurements. |
| Downtime (s) | Enter downtime in s; use the same basis as the other measurements. |
Understanding your result
Read Uptime (%), Uptime duration (s) in the units and model stated on this page. The formula uptime = window - downtime · availability = 100 * uptime / window 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
What is my uptime percentage after these outages?
Calculate time-based availability from an observation window and downtime.
Common uses
- What is my uptime percentage after these outages
How it works
uptime = window - downtime; availability = 100 * uptime / window
Worked example
Enter Observation window: 100000 s; Downtime: 100 s. Results: Uptime duration: 99900 s; Uptime: 99.9 %.