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FinOps Calculator

An interactive, single-file FinOps and cloud economics calculator for modeling break-even, pricing floor, cloud efficiency, and optimization actions.

This project is built as a landing-page style tool that guides users through:

  1. What the tool does and who it is for
  2. Author credibility and context
  3. A direct call-to-action into the calculator
  4. Live calculator inputs/outputs and chart analysis

What this tool helps you answer

  • How many clients are needed to break even?
  • What is the minimum viable price per client at current scale?
  • Is cloud spend efficient relative to revenue (CCER)?
  • How much can committed use discounts improve cloud economics?
  • Which FinOps actions should be prioritized for the current health zone?

Key features

  • Single-file implementation (index.html) with inline CSS and JavaScript
  • D3.js interactive chart (show/hide curve controls, hover readouts, zones)
  • Real-time recalculation as users type
  • Structured calculator groups:
    • Group A: Business snapshot inputs
    • Group B: Model tuning inputs
    • Group C: Auto-calculated KPIs
    • Group D: Cloud provider selection (with provider badges)
    • Group E: Health zone scoring and recommendation engine
  • Formula cards with explanatory tooltips
  • Academic and practitioner references section
  • Landing-page navigation links to jump to Calculator, Chart, and Formulas
  • Mobile-friendly responsive behavior

Core model concepts

The calculator uses a practical cloud economics model based on:

  • Development cost decay with scale
  • Super-linear infrastructure growth
  • Committed use discount effect
  • Break-even thresholding
  • Contribution margin and CCER health scoring
  • Minimum price floor based on target margin

Representative equations include:

  • DC(n) = K * n^-a
  • IC(n) = c * n^b
  • IC_cud(n) = g * c * n^(b*0.96)
  • MP(n) = TC(n) * (1 + m)

Project structure

  • index.html - complete application (UI, styles, model logic, chart rendering)
  • perfect-finops-calculator-prompt.md - implementation requirements and specification

Run locally

No build step is required.

Option 1: Open directly

Open index.html in your browser.

Option 2: Serve with a local static server

python3 -m http.server 8080

Then open http://localhost:8080.

Deploy

Because this is a static single-page file, deployment is straightforward:

  • GitHub Pages
  • Netlify
  • Vercel static hosting
  • Any static web server

Usage flow

  1. Read the landing intro and click Get Started
  2. Fill Group A with known business metrics
  3. Optionally tune Group B assumptions
  4. Review Group C KPI outputs
  5. Select cloud providers in Group D
  6. Use Group E health score and recommendations
  7. Explore the chart section for curve behavior and zone transitions
  8. Review formulas for model interpretation

Author

Duksh Koonjoobeeharry

Notes

  • This calculator is intended for decision support and scenario modeling.
  • Inputs and outputs should be validated against your actual billing, unit economics, and pricing data before operational decisions.