SLA Downtime
Free SLA Downtime calculator with clear step-by-step results.
About SLA Downtime
An SLA's allowed downtime shrinks rapidly as nines increase.
Formula
Formula
Downtime = (1 − SLA) × seconds per year
Worked example
With the default values below, SLA Downtime returns Allowed Downtime of 525 min 36 s / year. Change any input above and every figure here is recalculated in your browser.
Inputs used
- SLA (%)accepts 0–100
- 99.9
- Period
- year
Results
- Allowed Downtime
- 525 min 36 s / year
- Seconds per Year
- 31,536.00
- Per Month (approx)
- 2628 s / month
Step by step
- 1Values used
- 2Formula
- 3Allowed Downtime= 525 min 36 s / year
- 4Seconds per Year= 31,536
- 5Per Month (approx)= 2628 s / month
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax or fees or charges into account.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How does this calculator work?
An SLA's allowed downtime shrinks rapidly as nines increase.
Why does this matter?
99.99% is ~52 minutes a year; 99.999% is ~5 minutes.