Last updated October 23, 2026.
Which one do you need?
If the unknown is the monthly payment and the term is in years, use the mortgage calculator. If the term is already in months, use EMI. If you already chose the payment and want the number of months left, use loan payoff. Do not add the three results. They are not three parts of one housing bill.
Side by side
| Tool | Use when | Not for | Published example |
|---|---|---|---|
| Mortgage Calculator | You know the amount borrowed, the APR, and the term in years, and you want US-style principal and interest. | If the term is already in months, use EMI. If you already chose the payment, use loan payoff. | A $200,000 loan at 6% for 30 years is $1,199.10 a month. Total interest is $231,676.38. Property tax, insurance, and PMI are not in that figure. |
| EMI Calculator | You know the principal, annual rate, and tenure in months, and you want the equated monthly installment. | If the term is in years and you want a US principal-and-interest label, use the mortgage calculator. If the payment is already set, use loan payoff. | A 500,000 principal at 9% for 60 months is an EMI of 10,379.18. Total interest is 122,750.66. The currency is whatever you are counting in. |
| Loan Payoff Calculator | You know the balance, the APR, and the monthly payment you will send, and you want the number of months. | It does not invent the payment. Use mortgage or EMI when the unknown is the installment. | An 8,000 balance at 18% APR with a 250 payment clears in 44 months. Total interest is 2,980.45. A payment that does not cover monthly interest returns no result. |
Method and assumptions
Mortgage and EMI use the standard fixed-payment formula: monthly rate = APR ÷ 12 ÷ 100, then payment = P × r × (1+r)^n ÷ ((1+r)^n − 1). Mortgage converts years to months before that step. Loan payoff applies the same monthly rate, subtracts interest, and counts months until the balance is gone. None of the three adds taxes, insurance, fees, or a changing rate.
The same numbers, different questions
Take one published case and keep the inputs still. A $200,000 balance at 6% APR for 30 years is a mortgage payment of $1,199.10. Total interest on that schedule is $231,676.38. Property tax, insurance, and PMI are not in the figure. The page is principal and interest only.
EMI uses the same fixed-payment formula after the term is already in months. Thirty years is 360 months. The mortgage page converts years to months and then calls that formula, so an EMI entry of 200,000 at 6% for 360 months is the same question, not a second method. The pages differ in the unit you type and in the label on the result. EMI does not add a US housing escrow.
The second published case is a different job. An 8,000 balance at 18% APR with a payment of 250 clears in 44 months and 2,980.45 of interest. Loan payoff starts from the payment you chose. Mortgage and EMI start from the term and solve for the payment. Feeding $1,199.10 back into loan payoff would ask how many months that payment lasts. This comparison does not print that month count, because the payoff example we actually publish uses the 8,000 balance, not the mortgage balance.
A third mix-up is currency. The EMI example of 500,000 at 9% for 60 months is 10,379.18 a month and 122,750.66 of interest, in whatever unit you are counting. It is not a dollar mortgage and it is not a payoff timeline. Same family of amortization, three different unknowns.
Common mistakes
- Comparing a 30-year mortgage payment with a 60-month EMI and treating the gap as a cheaper loan. The terms are not the same length.
- Expecting the mortgage result to match a lender quote that includes tax, insurance, or PMI.
- Entering a payment that does not cover the month’s interest into loan payoff and expecting a finish date. That case returns no result.
- Using a US year-based mortgage page for a Pakistan-style tenure that you already have in months. Use EMI for that input.
Mortgage Calculator
You know the amount borrowed, the APR, and the term in years, and you want US-style principal and interest.
If the term is already in months, use EMI. If you already chose the payment, use loan payoff.
Example. A $200,000 loan at 6% for 30 years is $1,199.10 a month. Total interest is $231,676.38. Property tax, insurance, and PMI are not in that figure.
EMI Calculator
You know the principal, annual rate, and tenure in months, and you want the equated monthly installment.
If the term is in years and you want a US principal-and-interest label, use the mortgage calculator. If the payment is already set, use loan payoff.
Example. A 500,000 principal at 9% for 60 months is an EMI of 10,379.18. Total interest is 122,750.66. The currency is whatever you are counting in.
Loan Payoff Calculator
You know the balance, the APR, and the monthly payment you will send, and you want the number of months.
It does not invent the payment. Use mortgage or EMI when the unknown is the installment.
Example. An 8,000 balance at 18% APR with a 250 payment clears in 44 months. Total interest is 2,980.45. A payment that does not cover monthly interest returns no result.
Sources and limits
- Disclaimer — These are educational estimates, not a lender quote or credit decision.
Related guides
Questions
Do mortgage and EMI use different formulas?
No. Mortgage calls the same amortization math after converting the term from years to months. The pages differ in the unit of the term and in what they leave out of a housing payment.
Why is my lender’s payment higher than the mortgage result?
The mortgage page is principal and interest only. Lenders often add property tax, insurance, PMI, and fees.