Autoscaling Capacity
Free Autoscaling Capacity calculator with clear step-by-step results.
About Autoscaling Capacity
Autoscalers add capacity proportionally to keep utilization at target.
Formula
Formula
Target = current × (CPU ÷ target utilization)
Worked example
With the default values below, Autoscaling Capacity returns Target Instances of 212.1. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Current instancesminimum 1
- 3
- Average CPU utilizationaccepts 0–100
- 70
- Target utilizationaccepts 1–99
- 50
Results
- Target Instances
- 212.1
- Scale Factor
- 70.71
- Change Needed
- 209.1
Step by step
- 1Values used
- 2Formula
- 3Target Instances= 212.1
- 4Scale Factor= 70.71
- 5Change Needed= 209.1
Assumptions and limits
- The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How does this calculator work?
Autoscalers add capacity proportionally to keep utilization at target.
Why does this matter?
Hysteresis and cooldowns smooth real autoscaling.