Calculate simple interest and compound interest. See exactly how your savings or debt grows over time.
An Interest Calculator computes the interest earned or owed on a principal amount over time, supporting both simple interest and compound interest calculation methods.
Simple Interest equals Principal times Rate times Time, divided by 100. Compound Interest equals Principal times 1 plus Rate divided by 100, raised to the power of Time, minus Principal.
Enter the principal amount. Enter the interest rate. Enter the time period. Choose simple or compound interest. Click Calculate to see the interest earned and final total amount.
Example 1: A principal of 100000 rupees at 8 percent simple interest for 3 years earns 24000 rupees in interest.
Example 2: The same principal at 8 percent compound interest, compounded annually for 3 years, earns approximately 25971 rupees, slightly more due to compounding.
Comparing returns between simple and compound interest investments. Calculating interest owed on loans or borrowed amounts. Estimating savings growth over a defined time period. Understanding the long term impact of compounding on investments.
What is the difference between simple and compound interest. Simple interest is calculated only on the principal, while compound interest is calculated on the principal plus previously earned interest.
Why does compound interest grow faster over time. Because each period's interest is added to the principal, generating interest on interest in subsequent periods.
How does compounding frequency affect returns. More frequent compounding, such as monthly versus annually, results in slightly higher overall returns for the same nominal rate.
Is compound interest always better for investors. Yes, for investments, but for loans, compound interest means you owe more over time compared to simple interest.
Can this calculator handle different time units. Yes, most interest calculators support converting between days, months, and years as needed.