Free Uptime Monitoring Tools
Calculators, benchmarks, and reference data for developers building reliable services. No account required.
Uptime Calculator
Convert uptime percentages to allowed downtime per year, month, week, and day. Use this to set SLA targets or evaluate what a given percentage actually means.
Per year
8h 45m
Per month
43m 49s
Per week
10m 4s
Per day
1m 26s
Response Time Benchmarks
What counts as fast, acceptable, and slow for web applications. Reference these when setting alert thresholds for your monitors.
Source: Google research shows that 53% of mobile users abandon a page that takes more than 3 seconds to load. 1s is a common SLA target for API endpoints. Configure slow-response alerts in PingBase for your monitors.
SLA Reference Table
How much downtime each uptime SLA level actually allows. Use this when writing SLA commitments in contracts or evaluating vendor SLAs.
| Uptime | Per year | Per month |
|---|---|---|
| 99.999% | 5m 15s | 26s |
| 99.99% | 52m 35s | 4m 22s |
| 99.9% | 8h 45m | 43m 49s |
| 99.5% | 1d 19h | 3h 38m |
| 99% | 3d 15h | 7h 17m |
| 95% | 18d 6h | 1d 13h |
Check a Service's Status Page
Direct links to status pages for popular developer services. Check these when you're not sure if an issue is on your end or theirs.
Monitoring guides
Reference documentation for setting up and understanding uptime monitoring.
What Is a Status Page
Why every SaaS needs one and how to set it up.
How to Monitor API Endpoints
HTTP methods, status codes, response time thresholds, content validation.
Incident Communication
What to say, how often, and how to close the loop after an outage.
SSL Certificate Monitoring
How to avoid expired SSL certificates killing your site.
Heartbeat Monitoring
Monitor cron jobs and background workers, not just HTTP endpoints.
Uptime Monitoring Best Practices
What to monitor, how often, and how to avoid alert fatigue.
Set up monitoring in minutes
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