Cost · FinOps

Cloud FinOps Rightsizing Savings Calculator

Estimate savings from rightsizing compute and storage with conservative / aggressive scenarios.

Directional cloud waste vs savings bands for FinOps reviews — idle compute, storage waste, and reserved coverage.

How it works

Enter monthly cloud spend and estimated idle/oversize and storage waste percentages.
Pick conservative or aggressive capture and reserved coverage — savings bands update live.
Use first actions in FinOps reviews; unlock a printable summary with a work email.

Spend & waste inputs

Directional FinOps model — validate with utilization and commitment data.

Monthly cloud spend ($) Last 30 days all-in cloud bill for the scope you care about. Idle / oversize compute (%) Share of spend tied to idle, oversized, or orphaned compute.

22%

Storage waste (%) Unused volumes, old snapshots, wrong tiers, orphaned disks.

12%

Capture scenario Conservative ≈ 40% of waste; aggressive ≈ 75% in next quarter. Reserved / savings-plan coverage (%) Higher coverage dampens pure rightsizing upside on steady workloads.

35%

Savings bands

Defaults match the form. Change any input — numbers refresh instantly.

Monthly savings — After scenario + RI dampening

Annual savings — Monthly × 12

Compute waste $ — Idle/oversize pool (monthly)

Storage waste $ — Storage waste pool (monthly)

Recommended first actions — Prioritized for your waste mix

FinOps note

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Adjust inputs to see a tailored note.

Directional FinOps estimate only — not a commitment or invoice forecast.

How the model works

Compute waste pool = monthly spend × idle/oversize %.
Storage waste pool = monthly spend × storage waste %.
Capture rate = 40% (conservative) or 75% (aggressive).
RI dampening = compute savings × (1 − reserved coverage × 0.55).
Monthly savings = dampened compute capture + storage capture; annual = × 12.

All math runs in your browser. Treat bands as planning ranges for FinOps reviews.

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FAQ

How does the FinOps rightsizing calculator work?

You set monthly cloud spend, estimated idle/oversize %, storage waste %, reserved coverage %, and a conservative or aggressive capture scenario. The model breaks out waste dollars and monthly/annual savings bands with first actions.

What is idle/oversize %?

The share of compute spend that is idle, oversized, or orphaned (e.g. always-on non-prod, oversized VMs, unused disks attached to compute). Start with FinOps tooling or a sample week of utilization.

Conservative vs aggressive — what changes?

Conservative assumes you capture ~40% of identified waste in the next quarter; aggressive assumes ~75%. Use conservative for board commits and aggressive for stretch OKRs.

How does reserved coverage affect savings?

Higher reserved/savings-plan coverage reduces the upside from pure rightsizing on steady workloads, but unused commitments can still be waste. The model dampens compute savings as coverage rises.

Are savings guaranteed?

No. Realizations depend on change windows, app owners, and commitment strategy. Treat bands as planning ranges for FinOps reviews.

What should we do first?

Kill orphaned resources, rightsize obvious non-prod, then schedule commitment coverage for steady production. The results panel lists recommended first actions based on your waste mix.

How it works

How the model works

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FAQ

Cloud FinOps Rightsizing Savings Summary