Simple Interest Calculator
Calculate simple interest, total amount, principal, rate or time for loans and investments
💡 Quick Examples:
📚 Simple Interest Formula
SI = (P × R × T) / 100
Where: P = Principal, R = Rate, T = Time
Total Amount: A = P + SI
To find Principal: P = (SI × 100) / (R × T)
To find Rate: R = (SI × 100) / (P × T)
To find Time: T = (SI × 100) / (P × R)
Simple Interest vs Compound Interest
💰 Simple Interest
- ✅ Linear Growth: Interest stays constant
- ✅ Easy Calculation: Simple formula
- ✅ Predictable: Fixed interest amount
- ❌ Lower Returns: No compounding effect
- 🔵 Use Cases: Short-term loans, simple investments
📈 Compound Interest
- ✅ Exponential Growth: Interest on interest
- ✅ Higher Returns: Compounding effect
- ✅ Long-term Wealth: Best for investments
- ❌ Complex Calculation: Advanced formula
- 🟢 Use Cases: Investments, savings accounts
🏦 Common Applications
Personal Loans: Often simple interest
Car Loans: Usually simple interest
Bank FDs: Compound interest quarterly
PPF/EPF: Compound interest annually
Credit Cards: Compound interest monthly
💡 Key Insights
- 📊 Short-term: Difference is minimal
- ⏰ Long-term: Compound wins significantly
- 💸 Loans: Simple interest is borrower-friendly
- 💰 Investments: Compound interest is investor-friendly
- 🎯 Planning: Choose based on your goal
B. KUMAR
Founder of Discount Calculator
B. KUMAR is a seasoned developer and retail data analyst with over a decade of experience building custom e-commerce infrastructure and financial calculators. Passionate about consumer rights and digital literacy, he builds tools to help Indians decode complex marketing algorithms and make informed financial decisions.