Interest Calculator
Calculate your investment growth, interest, and buying power after inflation.
Investment Details
Enter your investment info
of each compounding period
Results
Investment summary
Enter investment details to see results
How to Use This Calculator
Step-by-step guide to get accurate results
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What is an Interest Calculator?
Our Online Interest Calculator helps you find out how much interest you will earn on savings and investments or pay on loans. Whether you need a Simple Interest Calculator or a Compound Interest Calculator, this tool gives you accurate results instantly. You can use it as a Loan Interest Calculator, Savings Interest Calculator, Investment Interest Calculator, or Bank Interest Calculator – all in one place.
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What is Interest?
Simple Interest (SI)
Calculated only on the principal amount. Formula: SI = (Principal × Rate × Time) ÷ 100
Compound Interest (CI)
Calculated on the principal plus accumulated interest. Formula: A = P × (1 + R/100)^T
Why Use Interest Calculators?
Daily, Monthly, and Annual Interest Calculators help you plan better for loans, savings, and investments.
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How to Use the Interest Calculator (Step by Step)
Step 1: Enter Principal Amount
Type the loan or investment amount.
Step 2: Enter Interest Rate
Provide the annual percentage rate (APR).
Step 3: Select Time Period
Choose the duration in months or years.
Step 4: Choose Interest Type
Select either Simple Interest or Compound Interest.
Step 5: Click Calculate
See total interest earned/paid and final balance.
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How to Calculate Investment Growth
This tool helps you estimate your investment growth, total interest, and buying power after inflation. Adjust the values to plan your financial future smartly!
Step 1: Enter Initial Investment
Start with the base amount you plan to invest.
Step 2: Add Contributions
Fill in your Annual and/or Monthly contribution.
Step 3: Contribution Timing
Select whether you contribute at the beginning or end of each period.
Step 4: Set Interest & Compounding
Enter the Interest rate and choose compounding frequency.
Step 5: Enter Investment Duration
Specify length in years and months.
Step 6: Add Optional Factors
Include Tax and Inflation rates for more accurate results.
Step 7: Click Calculate
See your investment summary, growth, total interest, and buying power after inflation.
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Example Calculation
Simple Interest Example
Investment: $10,000 at 8% annual interest for 5 years. SI = (10,000 × 8 × 5) ÷ 100 = $4,000. Final Amount = $14,000.
Compound Interest Example
Investment: $10,000 at 8% annual interest for 5 years (yearly compounding). A = 10,000 × (1 + 0.08)^5 = $14,693. Compound interest gives $693 more than simple interest.
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Benefits of Using Our Interest Calculator
Fast & Accurate
Instant results without manual calculations.
Compare SI vs CI
See the difference between simple and compound interest easily.
Works for All Cases
Loans, savings, FDs, mortgages, and investments.
Supports Flexible Modes
Daily, monthly, and yearly interest calculations.
Versatile Usage
Perfect for home loans, car loans, credit cards, business loans, and EMIs.
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Types of Interest Calculations You Can Do
Simple Interest Calculator
For short-term loans or deposits.
Compound Interest Calculator
See how interest grows with compounding (daily, monthly, yearly).
Loan Interest Calculator
Estimate total loan interest over time.
Car Loan Interest Calculator
Calculate interest on vehicle loans.
Personal Loan Interest Calculator
Check how much you’ll repay.
Credit Card Interest Calculator
Understand monthly card charges.
Savings Interest Calculator
See how your savings grow.
Fixed Deposit Interest Calculator
Calculate FD maturity value.
Investment Interest Calculator
Evaluate returns on investments.
EMI Interest Calculator
Find the interest portion in EMIs.
Business Loan Interest Calculator
Plan repayments for your business.
Home Loan Interest Calculator
Estimate interest for housing loans.
Interest Rate Calculator
Compare results at different rates.
Interest Accrual Calculator
Track accumulated interest over time.
Frequently Asked Questions
What is the formula for simple interest?
SI = (Principal × Rate × Time) ÷ 100
What is the formula for compound interest?
CI = Principal × (1 + Rate/100)^Time – Principal
Can I use this calculator for loans and savings both?
Yes, our tool works as a Loan Interest Calculator, Savings Interest Calculator, Investment Calculator, and Mortgage Interest Calculator.