Cloud Cost & FinOps
Cloud Rightsizing Calculator
Enter current CPU and memory allocation alongside P99 utilization percentages to compute the right-sized instance profile, potential annual savings, and recommended headroom factor.
No data is transmitted — everything runs locallyTool
About this tool
Cloud Rightsizing Calculator
The Cloud Rightsizing Calculator computes right-sized CPU and memory from P99 utilization data, with annual savings projection and configurable headroom factor.
• Calculate rightsizing savings opportunity for a given fleet of instances
• Determine the right CPU and memory allocation from observed P99 utilization
• Build a quarterly rightsizing review with projected savings for engineering leadership
• Identify the minimum safe headroom factor for production vs non-production workloads
Affiliate disclosure
Developer-friendly cloud infrastructure. DigitalOcean provides cloud compute, networking, and managed databases with predictable pricing.View on DigitalOcean
FAQ
What does this tool tell you?
The Cloud Rightsizing Calculator computes right-sized CPU and memory from P99 utilization data, with annual savings projection and configurable headroom factor.
What affects the result most?
Rightsizing opportunity: current_cost - right_sized_cost at given utilization percentages. CPU rightsizing: if P99 CPU utilization is X% of request, right-sized CPU = request × X% × headroom_factor. Memory rightsizing: same formula — max observed / requested × safety headroom.
How should I use the result?
The calculation is deterministic — the same inputs always produce the same output — so the most useful workflow is to vary one input at a time and see which factor moves the result most. That tells you where to focus your attention before committing to a decision.
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