Enter a percentage from 0 to 100, with up to 6 decimal places.
Nines: 3. Error budget for this target: 43.2 min per month.
Month length: 30 days. Year length: 365 days. Change these in Uptime to downtime.
Uptime: 99.8611%
Use up to 10 components, with 1 to 10 copies each.
Composite availability: 99.989100%. Allowed downtime: 4.71 min per month, 57.29 min per year.
This assumes that failures are independent and that failover always works. Treat the result as an upper limit.
SLA target: 99.99%. Estimated credit: 10%. How to claim: By the end of the second billing cycle after the incident. Source: Amazon EC2 SLA (2022-05-25) (checked 10 October 2026).
This is an estimate. The provider decides eligibility under its SLA terms and exclusions.
The default result is shown for 99.9% uptime, a 30-day month and a 365-day year. Enable JavaScript to use the calculator.
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