Free The Financial Engine
A comprehensive business intelligence dashboard. Calculate ROI, margins, amortization schedules — then compare scenarios side by side with interactive charts.
View Technical Specifications (For Developers)
- Calculations: Pure JavaScript math — no external libraries required for core calculators
- Charts: Chart.js (lazy-loaded from
/js/vendors/chart.min.js) for interactive visualizations - What-If Persistence: IndexedDB for saving and comparing up to 10 scenario snapshots per session
- Tax-Impact Slider: Real-time recalculation across ROI, margin, and net income via
requestAnimationFrame
ROI Calculator & Scenario Engine
Calculate return on investment with what-if scenario comparison and IndexedDB persistence.
Margin/Markup Calculator
Profit margin, markup percentage, cost-to-price calculations with live tax-impact slider.
Salary ↔ Hourly Converter
Convert between annual salary and hourly rate with benefits and tax estimation.
Loan Amortization
Full amortization schedule with monthly payment breakdown and cumulative interest chart.
Saved Scenarios
Save snapshots from any calculator above and compare them side by side.
Use any calculator and click "Save Scenario" to compare results here
About The Financial Engine
The Financial Engine is an uncompromising suite of local business calculators constructed for entrepreneurs, contractors, and retail managers who require granular fiscal foresight without utilizing invasive centralized software. Calculate exact gross profit margins, evaluate Return on Investment (ROI) trajectories, manage complex bi-weekly salary conversions, and graph comprehensive Loan Amortization schedules instantly. Running on state-of-the-art client-side JavaScript, this tool allows you to plug in highly confidential revenue data, proprietary margin percentages, and internal loan details safely. Avoid sharing your company's P&L vulnerabilities—analyze your financial leverage and amortization interest ratios locally.
How to Use This Tool
- Select Your Financial Module: Choose from ROI Calculator, Margin Tools, Salary Converter, or Loan Amortization.
- Input Baseline Revenue: Populate the principal figures, gross numbers, and localized tax or interest rates.
- Adjust the Sliders: Modify variables like timeline duration or markup percentages to see instant live results.
- Analyze the Data Curves: Review the dynamically generated tables charting interest decay or ROI projections.
- Print or Export Locally: Save the generated schedules to PDF directly via the browser's native print-to-PDF utility.
Frequently Asked Questions
Can I save my loan amortization schedule?
While the Financial Engine doesn't store data in a cloud database for privacy reasons, you can instantly export your generated amortization schedule as a local PDF or CSV via the browser's integrated generic download mechanics.
Are the margin calculations based on Gross or Net?
The margin calculator module defaults to Gross Margin (Revenue minus COGS equals Gross Profit), distinct from standard product markup ratios. We explicitly clarify which percentage is being tracked.