Server Uptime Calculator
server uptime calculator. Get instant, accurate results. Enter values for instant results with step-by-step formulas.
Reviewed by Daniel Agrici, Founder & Lead Developer
Reviewed by Daniel Agrici, Founder & Lead Developer
Formula
Uptime % = (Total - Downtime) / Total × 100
Calculate server uptime percentage and maximum allowed downtime for SLA targets.
Worked Examples
Example 1: 99.99% yearly
Problem:99.99% uptime for 1 year
Solution:525600×0.0001 = 52.56 min downtime
Result:52.56 min/year max
Frequently Asked Questions
Is my data stored or sent to a server?
No. All calculations run entirely in your browser using JavaScript. No data you enter is ever transmitted to any server or stored anywhere. Your inputs remain completely private.
Reviewed by Daniel Agrici, Founder & Lead Developer · Editorial policy