Interest Calculator
How to Use Interest Calculator
Enter the initial principal amount.
Input the annual interest rate and duration in years.
Compare the total accrued interest under simple vs compounding formulas.
Interest Calculator runs 100% client-side in your web browser. None of your financial figures, bank accounts, income details, loan amounts, or personal tax data are transmitted to any server or saved in cookies. Calculations happen entirely on your local device.
Frequently Asked Questions
Why is compound interest more powerful than simple interest?
Compound interest earns interest on previously earned interest, creating exponential growth over extended timeframes.
Related Finance Tools
More calculators in this financial category
Compound Interest Calculator
Forecast long-term compounding growth with customizable regular contributions and compounding frequencies.
Simple Interest Calculator
Calculate simple interest (P * R * T) / 100 for short-term loans, promissory notes, and fixed rate bonds.
SIP Calculator
Calculate future wealth generated by Systematic Investment Plans (SIP) in mutual funds and index funds.
Lumpsum Calculator
Determine future value of one-time lump-sum mutual fund and stock market investments.
Mutual Fund Returns Calculator
Model mutual fund growth with expense ratio deductions and compare SIP vs Lumpsum strategies.
CAGR Calculator
Calculate Compound Annual Growth Rate (CAGR) to benchmark investment and business performance.