Skip to main content
Calcimator

Network Uptime Calculator

Calculate network availability percentage from MTBF, MTTR, component count, and redundancy level. Shows downtime in hours/minutes per year.

Inputs

hours
hours

Results

Availability

99.96 %

Nines of Availability

3.4

Downtime per Year

3.51 hours

Downtime per Month17.53 min
Downtime per Week4.04 min
Single Component Avail.99.992 %
Series Path Avail.99.96 %
Expected Failures/Year0.88
Sla LevelThree 9s (99.9%)
How to Use This Calculator
  1. Enter MTBF (Mean Time Between Failures), MTTR (Mean Time to Repair), and Components in Series.
  2. Set Redundant Paths.
  3. Review Availability (%), Nines of Availability, and Downtime per Year (hours).
  4. Use Downtime per Month (min) and Downtime per Week (min) to inform your decision.
  5. Use the chart to visualize the results and explore different scenarios by adjusting inputs.
Ad Placeholder

Formula

A = MTBF/(MTBF+MTTR); Series = A^n; Parallel = 1-(1-A_series)^paths

Related Calculators

Network Latency Calculator

Calculate round-trip time from hops, distance, processing delays, and queuing. Includes VoIP quality assessment and TCP throughput estimate.

Switch Port Density Calculator

Calculate access, distribution, and core switch count from endpoint count, port requirements, and uplink oversubscription.

Bandwidth Capacity Planner

Calculate required network bandwidth from user count, application profiles, concurrency, and protocol overhead.

Network Rack Space Calculator

Calculate rack units needed from equipment list including switches, routers, servers, UPS, and patch panels. Includes power and cooling estimates.

Ad Placeholder