How It's Calculated
downtime = (1 − uptime%) × period_in_minutes
Periods used: 1440 min/day · 10080 min/week · 43800 min/month · 525960 min/year.
tool / devops
SLA Downtime Calculator
Enter an uptime percentage and see exactly how many minutes of downtime that allows per day, week, month, and year. Copy the table as Markdown for architecture docs.
← Back to tools % uptime
Standard SLA Comparison
| Uptime | Downtime / day | Downtime / week | Downtime / month | Downtime / year |
|---|
The "Nines"
- 99% — "two nines" — ~7.3 h/month. Consumer grade.
- 99.9% — "three nines" — ~43.8 min/month. Typical SaaS commitment.
- 99.95% — ~21.9 min/month. Common for managed cloud services.
- 99.99% — "four nines" — ~4.4 min/month. High-availability target.
- 99.999% — "five nines" — ~26 sec/month. Carrier-grade.
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