Loan Calculator | Monthly Payment, Interest & Total Repayment

Loan Calculator

Estimate your monthly loan payment, total interest and total repayment using the loan amount, annual interest rate and repayment period. This calculator uses a standard amortizing loan calculation.

Enter your loan information

Enter the amount you intend to borrow.
Enter the annual interest rate provided by the lender.
Enter the number of years over which the loan will be repaid.

Estimated loan repayment

Estimated monthly paymentNGN 0.00
Total repaymentNGN 0.00
Total interestNGN 0.00
Estimated first year interestNGN 0.00

The figures shown are estimates based on the information entered. Actual loan payments may differ because lenders can apply additional fees, charges, taxes, insurance, different interest calculation methods or other loan conditions.

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About the loan calculator

A loan calculator can help you estimate the cost of borrowing before you apply for a loan. By entering the loan amount, interest rate and repayment period, you can see an estimated monthly payment as well as the total amount that would be repaid over the full loan term.

This calculator is intended to provide a quick estimate for loans that use a standard monthly amortization method. It can be useful when comparing different loan amounts, interest rates and repayment periods.

The result should not be treated as a loan offer or a guarantee of the amount a lender will approve. Always review the terms supplied by your lender before accepting a loan.

How to use this loan calculator

To estimate your loan repayment, enter three basic pieces of information.

  1. Enter the amount you want to borrow.
  2. Enter the annual interest rate quoted by the lender.
  3. Enter the length of the loan in years.

The calculator automatically updates the estimated monthly payment, total repayment and total interest when you change any of the inputs.

Understanding your loan calculation

Loan principal

The principal is the amount you borrow before interest and other applicable charges are added. For example, if a lender approves a loan of NGN 5,000,000, the principal used by this calculator is NGN 5,000,000.

Interest rate

The interest rate represents the rate used to calculate the cost of borrowing. The calculator converts the annual rate into a monthly rate for its standard monthly repayment calculation.

Loan term

The loan term is the period over which the loan is scheduled to be repaid. A longer repayment period can reduce the estimated monthly payment, but it can also result in more interest being paid over the life of the loan.

Monthly payment

The monthly payment is the estimated amount required each month when the loan uses a standard fixed payment amortization structure. Part of each payment goes toward interest and the remaining portion goes toward reducing the principal.

Total interest

Total interest is the estimated amount of interest paid over the entire repayment period. It is calculated from the estimated total repayment minus the original loan principal.

How the monthly loan payment is calculated

For a loan with a nonzero interest rate, the calculator uses the standard amortization formula for a fixed monthly payment.

Monthly payment = P × r × (1 + r)n ÷ ((1 + r)n − 1)

P represents the loan principal.

r represents the monthly interest rate.

n represents the total number of monthly payments.

When the interest rate is zero, the calculation simply divides the principal by the number of monthly payments.

Factors that can affect your actual loan cost

A calculator provides an estimate based on the information entered. The actual cost of borrowing can be different depending on the lender and the specific loan agreement.

  • Loan processing or origination fees
  • Administrative charges
  • Insurance costs
  • Taxes or statutory charges
  • Variable interest rates
  • Different interest calculation methods
  • Early repayment charges
  • Late payment fees
  • Other charges specified in the loan agreement

Because of these factors, compare the complete cost of a loan rather than looking only at the monthly payment.

How loan term affects repayment

The repayment period can have a significant effect on the overall cost of a loan. Choosing a shorter term generally means fewer monthly payments and potentially less interest paid overall, but the monthly payment may be higher.

A longer term can make the monthly payment more manageable, but the borrower may pay interest for a longer period. The best option depends on the borrower's circumstances, income, expenses and the conditions of the loan.

Frequently asked questions

What does a loan calculator do?
A loan calculator estimates the monthly payment, total repayment and total interest for a loan based on the amount borrowed, interest rate and repayment period entered by the user.
Is the monthly payment shown by this calculator guaranteed?
No. The result is an estimate. A lender may calculate the payment differently or add fees, insurance, taxes and other charges that are not included in this basic calculation.
Does a longer loan term reduce the monthly payment?
In many standard amortizing loans, extending the repayment period reduces the monthly payment. However, the longer period can also increase the total interest paid over the life of the loan.
What is total repayment?
Total repayment is the estimated amount paid over the entire loan period, including the original principal and the calculated interest.
What is total interest?
Total interest is the estimated interest paid over the full repayment period based on the information entered into the calculator.
Can I use this calculator for Nigerian loans?
Yes. You can enter loan amounts in Nigerian naira and an annual interest rate supplied by your lender. However, Nigerian lenders may apply different fees, repayment structures or interest calculation methods, so the result should be treated as an estimate.
Does this calculator include loan fees?
No. This basic calculator estimates principal and interest only. Processing fees, insurance, taxes, penalties and other lender charges are not included unless they are incorporated into the loan amount entered by the user.
Does the calculator provide financial advice?
No. The calculator provides mathematical estimates and does not recommend whether you should take a loan. Consider your financial situation and review the lender's complete terms before making a borrowing decision.

Important financial information

This calculator is provided for general informational and educational purposes.

The results are estimates and should not be considered financial, investment, lending or legal advice.

Actual loan costs depend on the terms and conditions of the lender. Always check the official loan offer and repayment schedule before accepting a loan.

If you are uncertain about the affordability or suitability of a loan, consider obtaining independent financial advice from a qualified professional.

Loan calculations are estimates based on the information entered.
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