Uptime Calculator
Calculate uptime from downtime minutes.
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Copy or share after running the tool. Saved tools and settings stay in this browser.
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Calculate uptime percentage
Uptime turns availability into a simple percentage for status pages, reports and service reviews. Enter downtime minutes and period days to calculate uptime, formatted downtime and downtime per day. It is useful for web operations, SaaS reporting, incident reviews and service-level tracking.
Availability math
Use a consistent period when comparing uptime across services or vendors.
Frequently asked questions
What is uptime?
Uptime is available time divided by total time in the period.
Does this include partial outages?
Only if you include them in the downtime minutes.
Can I use it for monthly reports?
Yes. Enter the number of days in the reporting month.