Reliability calculators

14 free calculators, no login — type a number, see what it means.

Decide what a 99.9% promise to customers really allows, and how much of it you have alread

Decide whether to invest in preventing failures or in recovering faster.

Set alerts that page you when the error budget is draining too fast, not on every blip.

Your service is up 99.95%, but it needs three upstream services. What can you honestly pro

Put a number on a 45 minute outage to justify reliability work.

Score a production line on availability, speed and quality, as used in factories and IoT f

Check what your recovery targets mean in lost transactions and revenue.

Break an incident into the minutes before anyone starts fixing it and the minutes spent fi

Measure how much work is repetitive and manual, and whether automating a task pays back.

Find out how much of the paging noise is real, and how many incidents alerts still miss.

For a target like 99% of requests under 300 ms, see how much of the slow-request budget is

See how waiting time grows as a server, team or pool gets close to full.

Standard measures of how often and how long customers lose supply.

First contact resolution, reopen rate, SLA and cost per ticket.