Free tool, no signup
SLA / uptime calculator
Enter any uptime target and see exactly how much downtime it allows per day, week, month, and year. No account required.
99.9% uptime allows
- Per day
- 1m 26s
- Per week
- 10m 4s
- Per month
- 43m 47s
- Per year
- 8h 45m
“Per month” uses a 365/12-day average month, so twelve months of downtime always add up to one year of downtime. A 28, 30, or 31-day calendar month allows a slightly different figure.
The common SLA targets, at a glance
These are the uptime figures most contracts and status pages actually quote, sometimes called “the nines.” Each links to its own page with the full day/week/month/year breakdown.
What does that downtime actually cost?
A downtime budget in minutes is one thing; what those minutes cost your business is another. The downtime cost calculator turns a downtime figure (from this page, or a real incident) into an estimated dollar figure using your own revenue.
Know your budget. Now know if you’re inside it.
This tool answers a question of pure arithmetic: what a target allows on paper. Whether you are actually hitting it is a measurement question. RealUptime Monitor checks your endpoints on a schedule (four regions on Free, eight on Growth, all ten on Scale) and reports your real, measured uptime against whatever target you set.
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