💰 ROI Calculator

Calculate Return on Investment for smarter business decisions

📐 ROI Formula:

ROI = (Net Profit / Initial Investment) × 100%

Net Profit = Return - Initial Investment

💵 Investment Details

📊 Results

Net Profit

€0

ROI Percentage

0%

ROI Ratio

0:1

💡 Interpretation:

Enter values to see ROI analysis

📝 Notes & Context

📚 Recommended Reading

The Intelligent Investor → Check on Amazon

Benjamin Graham

Classic guide to value investing with fundamental principles for analyzing investment returns and making rational financial decisions.

Return on Investment (ROI) Basics

Harvard Business Review Press

Practical guide to calculating and improving ROI across marketing, projects, and business initiatives.

Marketing Metrics: The Manager's Guide to Measuring Marketing Performance

Paul Farris, Neil Bendle, Phillip Pfeifer, David Reibstein

Comprehensive framework for measuring ROI in marketing campaigns and customer acquisition.

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