1. Dual Interest Modes

• Simple Interest Formula:

  $$\text{SI}=P\times R\times T$$

  Example: A ₹1,00,000 investment at 8% annual interest over 5 years yields ₹40,000 in interest.

• Compound Interest Formula:

  A=P(1+rn)ntA=P(1+nr​)nt

  Example: ₹1,00,000 compounded monthly at 8% over 5 years grows to ₹1,49,175.

2. Multi-Currency Support

Switch between INR, USD, and EUR to view results in your preferred currency, ideal for global investors.

3. Advanced Financial Adjustments

• Monthly Contributions: Calculate growth with regular investments.

• Tax Adjustments: Deduct tax liabilities from interest earnings.

• Inflation Rate: Measure purchasing power over time.

4. Interactive Visualizations

• Donut Chart: Displays principal, interest, and contributions.

• Yearly Breakdown Table: Tracks annual balances, taxes, and dates.

5. Scenario Analysis

Compare best-case (+10% returns) and worst-case (-10% returns) projections to assess risk.

6. Mobile Responsiveness

Accessible on all devices, ensuring seamless use on smartphones, tablets, and desktops.

Formulas Powering the Interest Calculator

1. Simple Interest Formula

$$\text{SI}=P\times R\times T$$

• $P$: Principal amount

• $R$: Annual interest rate (decimal)

• $T$: Time period in years

2. Compound Interest Formula

A=P(1+rn)ntA=P(1+nr​)nt

• $A$: Final amount

• $r$: Annual interest rate (decimal)

• $n$: Compounding frequency per year

• $t$: Time period in years

3. Inflation-Adjusted Return

Real Return=Nominal Return(1+Inflation Rate)tReal Return=(1+Inflation Rate)tNominal Return​

4. Tax-Adjusted Interest

$$\text{Post-Tax Interest}=\text{Total Interest}\times (1-\text{Tax Rate})$$