Autoscaling Group Sizer

Size min/max/desired instance counts from load and a target utilization, with an illustrative daily scaling curve.

Average load (req/sec)

Peak load (req/sec)

Capacity per instance (req/sec)

Target utilization (%)

Min instances (HA floor)

Peak buffer (%)

Min

Desired

Max

Illustrative Daily Scaling Curve

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The daily curve is a synthetic sinusoidal pattern for illustration, not a forecast — replace with your own traffic curve when configuring real scaling policies. "Desired" is sized for average load; "Max" adds your buffer on top of peak load.

About the Autoscaling Group Sizer

Picking min/max/desired instance counts is usually a rough guess extrapolated from average and peak load. This tool turns that guess into a concrete calculation from your target utilization and capacity per instance, and visualizes what scaling would look like across a typical day.

Key Features

Min/desired/max instance counts from load, capacity, and target utilization.
Configurable HA floor and peak buffer.
Illustrative 24-hour scaling curve to visualize the pattern.