Simple Loan Calculator

  • Enter the loan amount, annual interest rate, and loan term in months.
  • Click "Calculate" to calculate the loan details, including the monthly payment, total payment, and total interest paid.
  • Click "Clear" to reset the form and results.
  • Click "Copy" to copy the results to the clipboard.
  • Your calculation history will be displayed below.
Calculation History:

    In the world of personal finance, managing loans is a crucial aspect of one’s financial well-being. Whether it’s a car loan, mortgage, or a personal loan, understanding the terms and repayment schedule is vital. This is where tools like the “Simple Loan Calculator” come into play.

    Understanding the Simple Loan Calculator

    The Simple Loan Calculator is a user-friendly financial tool designed to help individuals and businesses quickly determine their loan payments and visualize the repayment schedule. It simplifies complex calculations and provides users with essential information to make informed financial decisions.

    Key Inputs

    1. Principal Amount (P): The initial loan amount borrowed.
    2. Interest Rate (r): The annual interest rate, expressed as a percentage.
    3. Loan Term (n): The number of months or years over which the loan will be repaid.

    Key Outputs

    1. Monthly Payment (M): The amount to be paid each month, including both principal and interest.
    2. Total Interest Paid (TIP): The total interest paid over the life of the loan.
    3. Total Payment (TP): The total amount paid, including the principal and interest.

    Formulae Used

    To perform these calculations, the Simple Loan Calculator utilizes two primary formulae: the formula for calculating the monthly payment and the formula for calculating the total interest paid.

    Monthly Payment (M)

    The formula for calculating the monthly payment (M) is based on the concept of the amortization of loans and is derived from the present value of an annuity formula:

    M = (P * r * (1+r)^n) / ((1+r)^n – 1)


    • P is the principal loan amount.
    • r is the monthly interest rate (annual rate divided by 12 months and converted to a decimal).
    • n is the total number of monthly payments.

    Total Interest Paid (TIP)

    The formula for calculating the total interest paid (TIP) is straightforward:

    TIP = (M * n) – P


    • M is the monthly payment.
    • n is the total number of monthly payments.
    • P is the principal loan amount.

    Example Calculations

    Let’s illustrate the use of the Simple Loan Calculator with a practical example:

    Suppose you borrow $10,000 with an annual interest rate of 5%, and the loan term is 3 years (36 months).

    Monthly Payment (M)

    Using the formula for calculating the monthly payment:

    M = (10,000 * 0.05 * (1+0.05)^36) / ((1+0.05)^36 – 1)

    After performing the calculation, you find that the monthly payment (M) is approximately $299.71.

    Total Interest Paid (TIP)

    To calculate the total interest paid (TIP):

    TIP = (299.71 * 36) – 10,000

    The total interest paid over the life of the loan is approximately $1,789.56.

    Real-World Use Cases

    The Simple Loan Calculator serves various real-world use cases, making it a valuable tool in personal and business finance:

    Mortgage Planning

    Homebuyers can use this tool to estimate their monthly mortgage payments and plan their budgets accordingly. It helps them understand the financial commitment associated with homeownership.

    Auto Financing

    Car buyers can determine their monthly car loan payments before visiting dealerships, allowing them to negotiate better loan terms.

    Personal Loans

    Individuals considering personal loans for various purposes, such as debt consolidation or home improvements, can use the calculator to assess the impact of different interest rates and loan terms on their monthly payments.

    Investment Decisions

    Investors can use the tool to evaluate the profitability of investment properties by calculating the potential cash flow after deducting mortgage payments.

    Small Business Loans

    Entrepreneurs and small business owners can use the Simple Loan Calculator to analyze the financial implications of different loan options when funding their businesses.


    The Simple Loan Calculator is a powerful and user-friendly financial tool that simplifies loan-related calculations. By providing essential information such as monthly payments, total interest paid, and total payments, it empowers individuals and businesses to make informed financial decisions. Whether it’s for managing mortgages, auto loans, personal loans, or small business financing, this tool is a valuable asset in today’s complex financial landscape.


    • Brigham, E. F., & Houston, J. F. (2015). Fundamentals of Financial Management. Cengage Learning.
    • Madura, J. (2017). Financial Markets and Institutions. Cengage Learning.
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