Idle Resource Waste Calculator

Work out idle resource waste instantly with clear inputs, formula shown and shareable results.

About Idle Resource Waste Calculator

Non-production environments are needed for roughly 50 of the week's 168 hours, so leaving them running wastes 70 percent of their cost. Scheduled shutdown outside working hours is the single largest and easiest cloud saving available. Unattached volumes and orphaned snapshots are the other classic waste category, invisible because no instance appears in the bill.

Formula

Idle waste

utilisation = needed hours / 168; scheduled spend = current x utilisation; waste = current - scheduled + unattached storage cost

Worked example

With the default values below, Idle Resource Waste Calculator returns Identifiable monthly waste of $12,440.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Non-production instancesminimum 1: 140
Monthly cost per instanceminimum 0: 120
Hours actually needed per weekaccepts 1–168 h: 50 h
Unattached storage volumesminimum 0 GB: 8,000 GB

Results

Identifiable monthly waste: $12,440.00
Saving from scheduling non-production off hours: $11,800.00
Cost of unattached volumes: $640.00
Share of the week resources sit idle: 70.2%

Step by step

1Values used
2Idle waste
3Identifiable monthly waste= 12,440.00
4Saving from scheduling non-production off hours= 11,800.00
5Cost of unattached volumes= 640.00
6Share of the week resources sit idle= 70.2

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax 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

Why is scheduling not universally applied?

Because it needs care with stateful services and CI runners, and because someone must own it. The saving is large enough that the effort almost always pays back within the first month.

What other resources are commonly orphaned?

Unattached volumes, old snapshots, unused elastic IPs, idle load balancers, empty NAT gateways and forgotten test databases. All bill continuously with no workload attached.