Minimum instances
5
Instances Calculator
Estimate minimum and recommended instance count from throughput and safety margin.
Instances estimation
Result
Recommended instances
6
How it works
The tool calculates a minimum instance count from throughput demand and per-instance capacity, then applies margin for safer provisioning.
Formula
minimum = ceil(expected_rps / per_instance_rps)
recommended = ceil(minimum * (1 + margin_pct/100))Rounding up is required because partial instances cannot be provisioned.
Example
If demand is 900 RPS and each instance handles 200 RPS, minimum is 5 and recommended grows with margin.
FAQ
Why round up?
Capacity planning must use whole instance units.
Can I use this for Kubernetes pods?
Yes, the same throughput math applies to pod-based deployments.
Do I still need load tests?
Yes. This is a planning estimate, not a replacement for empirical tests.