1. What is SLA Uptime?

SLA (Service Level Agreement) Uptime measures the percentage of time a service is operational and available. It's a key metric in IT service management and cloud computing to quantify reliability.

2. How Does the Calculator Work?

The calculator uses the SLA Uptime formula:

Where:

• \( Downtime\,Allowed \) — Total allowed downtime in minutes
• \( Total\,Time \) — Total time period in minutes

Explanation: The formula calculates the percentage of time the service is available by subtracting the downtime percentage from 100%.

3. Importance of SLA Uptime

Details: SLA Uptime is crucial for service providers and customers to define and measure reliability expectations. Common SLA tiers include 99.9% ("three nines"), 99.99% ("four nines"), and 99.999% ("five nines").

4. Using the Calculator

Tips: Enter allowed downtime and total time period in minutes. Both values must be positive numbers, with total time greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What's considered good SLA Uptime?
A: 99.9% (≈43.8 minutes downtime/month) is common for business services, while 99.99% (≈4.4 minutes/month) is expected for critical services.

Q2: How do I convert monthly uptime to annual?
A: For consistent uptime, annual is similar to monthly. However, annual calculations account for longer potential outages.

Q3: Does planned maintenance count against SLA?
A: Typically no, if properly communicated in advance according to SLA terms.

Q4: What's the difference between availability and uptime?
A: Uptime measures system running time, while availability considers whether the service is actually usable (including performance factors).

Q5: How do I calculate required uptime for a specific SLA percentage?
A: Rearrange the formula: Downtime Allowed = Total Time × (100 - SLA%) / 100