Uptime Calculator

How to Use This Calculator

1. Enter the start date and time (when the system started or event began).
2. Enter the end date and time (current time or when you want to measure until).
3. The calculator displays the uptime/duration in days, hours, minutes, and seconds.
4. Use this to track system uptime, measure event durations, or calculate time differences.

Uptime Formula

Uptime is calculated from start and end times:

Example: System started on Jan 1, 2024 00:00:00 and current time is Jan 5, 2024 12:30:45: Uptime = 4 days, 12 hours, 30 minutes, 45 seconds = 108.5125 hours = 6510.75 minutes. The calculator handles all time unit conversions automatically.

Full Description

Uptime is a critical metric for system reliability and availability. It measures how long a system has been running continuously without interruption, from the last restart or boot time to the current time (or a specified end time). Understanding uptime helps you evaluate system stability, plan maintenance windows, and measure service availability.

Uptime is calculated as the difference between start and end times. It can be expressed in various units: days, hours, minutes, seconds, or total hours/minutes/seconds. High-availability systems aim for maximum uptime (99.9% or higher), while personal systems may have more frequent restarts. Uptime is also used to measure event durations, track service availability, and calculate system reliability metrics.

This calculator helps you determine uptime or duration between two dates and times. Enter start and end dates/times, and it calculates the duration in multiple formats. Use it to track system uptime, measure event durations, calculate time differences, or understand system reliability. Uptime calculations are essential for system monitoring, maintenance planning, and availability tracking.

Frequently Asked Questions