Reliability, Uptime & SLA Calculators

Availability engineering math used by SREs, service desks and DR planners: nines to allowed downtime, MTBF/MTTR, redundancy models, SLO error budgets and the business cost of outages.

5 calculators in this category

Which one do you need?

Uptime SLA Downtime Calculator
Convert any uptime target into allowed downtime per day, week, month and year, then check measured outage minutes against the SLA and see the nines achieved.
MTBF, MTTR & Availability Calculator
Turn operating hours and a failure log into MTBF, MTTR, failure rate, AFR, FIT and inherent availability, with annual downtime in minutes and nines.
System Availability Calculator (Series & Redundancy)
Combine component availabilities into an end-to-end figure for chained dependencies, redundant pairs and k-of-n clusters, with nines and downtime per year.
SLO Error Budget & Burn Rate Calculator
Turn an SLO into an error budget of failed requests and bad minutes, then track budget consumed, burn rate, time to exhaustion and multi-window alert thresholds.
IT Downtime Cost Calculator
Calculate what an outage costs per minute, per hour and per incident from lost revenue, idle staff, recovery labour and SLA penalties, and size your redundancy budget.

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