WordPress Hosting Uptime Explained: What 99.9% vs 99.99% Really Means

Updated: January 2025 · By WPHostPro Team

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Every hosting provider promises great uptime. But what do those percentages actually mean for your website — and which hosts actually deliver?

Uptime Percentages Translated to Real Downtime

Uptime %	Monthly Downtime	Annual Downtime
99%	7.2 hours	87.6 hours
99.9%	43.8 minutes	8.76 hours
99.95%	21.9 minutes	4.38 hours
99.99%	4.38 minutes	52.6 minutes
99.999%	26.3 seconds	5.26 minutes

For an ecommerce site processing $1,000/hour, the difference between 99.9% and 99.99% uptime is roughly $8,700/year in lost revenue from downtime alone.

Our 30-Day Uptime Test Results

We monitored all 6 top hosts for 30 days using UptimeRobot checking every minute from 3 locations:

Kinsta: 99.99% ✅
WP Engine: 99.99% ✅
Cloudways: 99.98% ✅
SiteGround: 99.97% ✅
Hostinger: 99.95% ✅
Bluehost: 99.94% ✅

For mission-critical sites, only WP Engine and Kinsta offer a formal uptime SLA with credits for downtime.