Lab · 01 · SLO calculator
What's a defensible SLO target?
Plug in last month's request volume and observed error rate. We'll compute a starting target, an error budget in minutes, and a sample burn-rate alerting policy.
Inputs · workload · 30 days
Total requests / month
Failed requests observed (last 30d)
Tier classification
Calculations run in your browser. Nothing is sent to us.
Output · live
Observed availability —
Tier target —
Error budget · 30d —
Budget · in minutes —
Status —
Suggested burn-rate alerts
- Fast burn (1h window)—
- Slow burn (6h window)—
- Page threshold14× budget burn
Engagement.start()
Want this turned into actual policy?
The calculator gives you a number. Foundational gives you a working error-budget policy your team enforces — and a runbook for when it burns.