Calculate Simple Interest, Compound Interest, FD Maturity, and RD Returns instantly
Initial investment amount
Annual interest rate
Investment duration in years
How often interest is calculated and added
Amount you deposit every month
Choose from Simple Interest, Compound Interest, Fixed Deposit, or Recurring Deposit calculations.
Fill in principal amount, interest rate, and time period. For RD, enter monthly deposit amount.
For CI and FD, select how often interest compounds (yearly, half-yearly, quarterly, or monthly).
Click calculate to see interest earned, total amount, and detailed breakdown of your investment.
Multiple Calculation Types
SI, CI, FD, and RD calculations all in one tool
Flexible Compounding
Yearly, half-yearly, quarterly, or monthly compounding options
Instant Calculations
Real-time results with precise decimal handling
Mobile Friendly
Fully responsive design works on all devices
Investment Planning
Plan your savings and investments effectively
Detailed Breakdown
Shows principal, interest, and total amount separately
Simple Interest
SI = (P × R × T) / 100
Interest calculated only on principal amount
Compound Interest
A = P × (1 + r/n)^(n×t)
Interest earned on both principal and accumulated interest
Fixed Deposit (FD)
Same as compound interest formula
Lump sum investment with guaranteed returns
Recurring Deposit (RD)
A = M × ((1+i)^n - 1)/i × (1+i)
Monthly investments with compound interest
💡 Pro Tip: Higher compounding frequency leads to better returns. Monthly compounding gives the highest returns compared to yearly or quarterly compounding. Use this calculator to compare different frequencies and maximize your investment returns.
Start early to benefit from the power of compounding
Compare different compounding frequencies before investing
For long-term goals, consider compound interest investments
FDs offer guaranteed returns, ideal for conservative investors
RDs help build disciplined saving habits with regular deposits
Always consider inflation while calculating real returns