Availability %
Calculate Availability % instantly with the exact formula and a worked example.
Availability %
MTBF (mean time between failures)h
MTTR (mean time to repair)h
Target SLA%
Availability
99.723%
SLA
Not met
Downtime per year
24.27h
Downtime per month
121.3min
Allowed by SLA per year
8.76h
Number of nines
2.56
More about: Availability %
What it calculates
The “Availability %” calculator computes Availability in % from 3 parameters: mtbf (mean time between failures) (h), mttr (mean time to repair) (h), target sla (%).
A handy everyday calculator for daily tasks.
Example calculation
With parameters MTBF (mean time between failures) = 720 h, MTTR (mean time to repair) = 2 h, Target SLA = 99.9 % the result is 99.72 %.
How to use
- Enter mtbf (mean time between failures), mttr (mean time to repair) and target sla — each field above is adjustable with a slider.
- Availability (%) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Availability % calculated?
The Availability % calculator computes Availability (in %) from mtbf (mean time between failures), mttr (mean time to repair), target sla. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Availability % calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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