Two weeks ago I shared a collection of 6 financial calculators. The response was incredible, so I kept building.
Today, fi-calc.com has 25 completely free calculators covering every major personal finance need:
🏠 Housing
• Mortgage Calculator (full PITI + amortization schedule + pie chart)
• Rent vs Buy Calculator
• House Affordability Calculator
• Refinance Calculator
💰 Investing & Retirement
• Compound Interest Calculator
• Investment Return Calculator
• Future Value & Present Value Calculators
• ROI Calculator
• Retirement Savings Calculator
• 401(k) Calculator
• FIRE Calculator (Financial Independence)
💳 Debt & Loans
• Loan Comparison Calculator
• Auto Loan Calculator
• Student Loan Calculator
• Credit Card Payoff Calculator
• Debt Payoff Calculator (Avalanche method)
📊 Everyday Finance
• Budget Planner (50/30/20 rule)
• Savings Goal Calculator
• Inflation Calculator
• Salary & Take-Home Pay Calculator
• Net Worth Calculator
• Currency Converter (15+ currencies)
• CD Calculator
• Sales Tax Calculator
✨ Tech Stack
• Pure vanilla HTML/CSS/JS — no frameworks
• Chart.js for animated interactive charts
• Responsive design (mobile-friendly)
• All calculations run client-side in your browser
• No data collection, no accounts, no cookies
🔗 Give it a try: fi-calc.com
The entire site is free and open. I built it because I was tired of calculator sites with paywalls, signup walls, and bloated ad experiences.
Would love feedback from the community! What other calculators should I build next?
