Loading...
Calculate interest earnings instantly. Compare simple vs compound interest, view year-by-year breakdown, and analyze returns with tax & inflation adjustments.
Calculate simple and compound interest with advanced features
Calculate both simple and compound interest simultaneously
View year-by-year interest accumulation and growth
Compare yearly, quarterly, monthly, and daily compounding
Adjust for taxes and inflation to see real returns
Input the initial investment or principal amount (e.g., $10,000).
Enter the annual interest rate as a percentage (e.g., 8%).
Select the investment duration in years (1-30 years).
Choose how often interest compounds: yearly, quarterly, monthly, or daily.
Interest calculated only on the principal amount throughout the investment period. Growth is linear and predictable.
Interest calculated on principal plus accumulated interest. Growth is exponential and accelerates over time.
Calculate the impact of regular monthly, quarterly, or yearly deposits on your returns
See your after-tax returns by entering your tax rate on interest income
Understand real returns by adjusting for inflation and purchasing power loss
Compare all compounding frequencies side-by-side to see the impact
View detailed annual breakdown of interest accumulation and growth
Compare simple and compound interest results simultaneously
Detailed compound interest calculations
Calculate simple interest returns
Plan your investment strategy
Calculate savings growth over time
Calculate return on investment
Fixed deposit interest calculator
The power of compound interest grows exponentially over time. Starting even a few years earlier can result in significantly higher returns.
Opt for accounts with more frequent compounding (daily or monthly) to maximize your returns, especially for long-term investments.
Adding regular deposits, even small amounts, can dramatically increase your final returns through consistent compounding.
Our interest calculator uses industry-standard formulas and is designed to provide accurate estimates. For more information about interest calculations and investment strategies, consult these authoritative sources:
Official guidance on compound interest and investment returns
Information about interest rates and monetary policy
Comprehensive guides on interest calculations and investment strategies
Consumer resources for understanding interest and savings
Clean, modern design with intuitive controls and real-time calculations
Perfect experience on mobile, tablet, and desktop devices
Calculate both simple and compound interest simultaneously for easy comparison
Calculator, Comparison, Breakdown, and Advanced analysis in one tool
See real returns after accounting for taxes and inflation impact
Calculate the impact of regular deposits with customizable frequency
Compare yearly, half-yearly, quarterly, monthly, and daily compounding
Detailed annual breakdown showing interest accumulation over time
Instant calculations with no page reloads or delays
Calculate returns on high-yield savings accounts
Estimate CD returns with different terms
Plan long-term investment strategies
Calculate college fund growth
Project retirement savings growth
Plan for home down payment goals
Calculate bond interest returns
Forecast business investment returns
Get started with our free interest calculator and see how your money can grow over time.
Calculate Now →