SLA & Uptime Calculator
Humanize uptime, MTTR, error budgets, deployment windows, and SLA percentages.
Calculating SLA, uptime, and error budgets
Uptime percentages translate to allowed downtime per month or quarter. Error budgets connect reliability targets with deployment velocity: when burn rate exceeds policy, teams freeze risky releases. MTTR and deployment window math supports post-incident reviews.
Three nines (99.9%) allows roughly 43 minutes downtime per month; four nines shrinks that dramatically. Clarify whether calculations use calendar months or rolling 30-day windows because vendor SLAs differ.
Humanized uptime strings help executives while engineers need raw seconds for monitoring queries. Document measurement points (synthetic versus user traffic) beside published SLA figures.
Model budgets locally with hypothetical revenue numbers from finance spreadsheets. No server upload is required for what-if incident simulations.
Reference Guide
DevOps tool - all processing runs locally in your browser. No data is sent to a server.
Operation: uptime-calc
Paste input, click Run, and copy the result. For two-input tools, fill both fields before running.
Example Input
90061
A sample loads automatically when you open this tool. Use Load Sample to reset it.