Free SLA Uptime Calculator
Calculate your service level agreement downtime instantly. Enter your uptime percentage to get accurate downtime calculations for daily, weekly, monthly, and yearly periods.
Calculate SLA Downtime
Understanding SLA Uptime and Downtime
A Service Level Agreement (SLA) uptime calculator helps you understand the real-world impact of your service availability commitments. When you promise 99.9% uptime, what does that actually mean in terms of allowable downtime?
Common SLA Uptime Percentages
99.9% Uptime
8.77 hours downtime per year
99.99% Uptime
52.6 minutes downtime per year
99.999% Uptime
5.26 minutes downtime per year
99.95% Uptime
4.38 hours downtime per year
Why Use an SLA Calculator?
- Set realistic expectations with customers and stakeholders
- Plan maintenance windows within allowable downtime
- Calculate potential penalties for SLA breaches
- Compare different service level commitments
- Budget for infrastructure redundancy and monitoring
Best Practices for SLA Management
Effective SLA management requires careful planning, monitoring, and communication. Consider implementing automated monitoring, redundant systems, and clear escalation procedures to meet your uptime commitments.
Frequently Asked Questions
How is SLA uptime calculated?
SLA uptime is calculated as (Total Time - Downtime) / Total Time × 100. Our calculator works backwards from the uptime percentage to show you the allowable downtime.
What's considered a good SLA uptime?
Most enterprise services aim for 99.9% (8.77 hours downtime/year) or higher. Mission-critical systems often target 99.99% or 99.999% uptime.
Does planned maintenance count as downtime?
This depends on your SLA terms. Some agreements exclude planned maintenance windows, while others include all downtime regardless of cause.