Simple and Compound Interest Calculator
Calculate simple and compound interest instantly for deposits or loans. Get clear totals, comparisons, and insights in one place.
Calculation Details
Min: ₹1,000•Max: ₹10,00,00,000
Min: 0.1% • Max: 20%
Min: 1 year • Max: 10 years
Simple Interest
Compound Interest
About Simple/Compound Interest Calculator & Frequently Asked Questions
What is the Simple & Compound Interest Calculator?
The Interest Calculator is a foundational mathematical utility that computes the interest earned on savings or paid on loans across any tenure. It provides two distinct modes including Simple Interest, where return is calculated strictly on the original principal, and Compound Interest, where you earn exponential interest on interest. To evaluate actual bank fixed deposit yields with quarterly compounding rules, see our FD Calculator.
Where and Why is it Helping?
- Visualizes Compounding Power: Shows side-by-side how reinvesting interest generates dramatically more wealth over time than simple linear growth.
- Compounding Frequency Modeling: Test daily, monthly, quarterly, semi-annual, or annual compounding intervals to understand effective annual yields.
- Estimating Doubling Time: See how many years it takes for compounding interest to double your capital with our Rule of 72 Calculator.
- Comparing Investment Performance: To calculate the annualized compound rate delivered by a real-world multi-year portfolio, use our CAGR Calculator.
How to Use the Calculator
- Enter Principal Amount: Input the initial money you plan to invest or borrow.
- Set Annual Interest Rate: Input the interest rate per year.
- Choose Duration: Select the time period in years and/or months.
- Select Calculation Method: Choose between Simple Interest or Compound Interest.
- Choose Compounding Frequency: If you selected Compound Interest, specify how often it compounds (monthly, quarterly, yearly, etc.).
- View the Breakdown: The calculator immediately displays the final total amount, total interest, and a detailed growth table.
The Formula & Example
- Simple Interest Formula: A = P * (1 + r * t), where A is the total maturity value, P is the principal, r is the annual rate (in decimal), and t is time in years.
- Compound Interest Formula: A = P * (1 + r / n)^(n * t), where n is the number of times interest compounds per year.
- For example, if you invest ₹1,00,000 for 3 years at a 10% annual interest rate: Simple Interest yields ₹1,30,000 (₹30,000 interest). Yearly Compounding yields ₹1,33,100 (₹33,100 interest). Quarterly Compounding yields approximately ₹1,34,489 (₹34,489 interest), highlighting the value of compounding frequency.
About Simple/Compound Interest Calculator & Frequently Asked Questions
What is the Simple & Compound Interest Calculator?
The Interest Calculator is a foundational mathematical utility that computes the interest earned on savings or paid on loans across any tenure. It provides two distinct modes including Simple Interest, where return is calculated strictly on the original principal, and Compound Interest, where you earn exponential interest on interest. To evaluate actual bank fixed deposit yields with quarterly compounding rules, see our FD Calculator.
Where and Why is it Helping?
- Visualizes Compounding Power: Shows side-by-side how reinvesting interest generates dramatically more wealth over time than simple linear growth.
- Compounding Frequency Modeling: Test daily, monthly, quarterly, semi-annual, or annual compounding intervals to understand effective annual yields.
- Estimating Doubling Time: See how many years it takes for compounding interest to double your capital with our Rule of 72 Calculator.
- Comparing Investment Performance: To calculate the annualized compound rate delivered by a real-world multi-year portfolio, use our CAGR Calculator.
How to Use the Calculator
- Enter Principal Amount: Input the initial money you plan to invest or borrow.
- Set Annual Interest Rate: Input the interest rate per year.
- Choose Duration: Select the time period in years and/or months.
- Select Calculation Method: Choose between Simple Interest or Compound Interest.
- Choose Compounding Frequency: If you selected Compound Interest, specify how often it compounds (monthly, quarterly, yearly, etc.).
- View the Breakdown: The calculator immediately displays the final total amount, total interest, and a detailed growth table.
The Formula & Example
- Simple Interest Formula: A = P * (1 + r * t), where A is the total maturity value, P is the principal, r is the annual rate (in decimal), and t is time in years.
- Compound Interest Formula: A = P * (1 + r / n)^(n * t), where n is the number of times interest compounds per year.
- For example, if you invest ₹1,00,000 for 3 years at a 10% annual interest rate: Simple Interest yields ₹1,30,000 (₹30,000 interest). Yearly Compounding yields ₹1,33,100 (₹33,100 interest). Quarterly Compounding yields approximately ₹1,34,489 (₹34,489 interest), highlighting the value of compounding frequency.