Mortgage & real estate

Mortgage Amortization Calculator

See how each monthly payment splits between principal and interest, and watch the balance fall month by month with a full amortization schedule.

  • Free
  • No sign-up
  • Updated for 2026

Mortgage details

$
%

Enter your loan amount, rate and term to build the amortization schedule.

Worked example

With these example inputs:

  • Loan amount$300,000
  • Interest rate6%
  • Term (years)30

Monthly payment: $1,799

  • Loan amount$300,000
  • Total interest$347,515
  • Total of payments$647,515
  • Payoff time30 yr

Add this calculator to your site

Free to embed. Copy the snippet below, it drops the live calculator straight into any page.

What this mortgage amortization calculator does

This calculator finds your monthly mortgage payment. You enter the loan amount, rate, and term. The tool then shows the payment in your currency. It reveals how a mortgage amortizes. This is a key home buying tool. You can run a few what-ifs. The result helps you plan a loan.

What amortization is

Amortization is paying off a loan in equal steps. Each payment is the same each month. Part covers interest and part covers principal. Over time the loan falls to zero. So the debt clears on a set path. It is how a mortgage works. It appears in the currency you choose.

How it is calculated

The tool takes your loan amount. It spreads it over the term in equal payments. It adds interest at your rate each month. The payment is set so the loan ends at zero. The same amount is due each month. The calculator works it out for you.

What the result tells you

The result shows your monthly payment. A loan of three hundred thousand at six percent over thirty years costs about eighteen hundred a month. A higher rate or amount raises it. A longer term lowers each payment. So it shows what you must pay. It is a clear monthly figure.

Principal and interest over time

Each payment splits into principal and interest. Principal pays down what you borrowed. Interest is the cost of the loan. Early payments are mostly interest. Later ones are mostly principal. So the split shifts over time. This is the heart of amortization.

The amortization schedule

An amortization schedule lists every payment. It shows the split for each month. It tracks the balance as it falls. So you can see the loan clear step by step. The interest share shrinks over time. The principal share grows. It maps the whole payoff.

The total interest over the term

A long mortgage carries a lot of interest. Each year adds to the total cost. The rate sets how steep it climbs. A higher rate means far more interest. So the total can rival the loan itself. A shorter term cuts it sharply. Watch the total, not just the payment.

How to use it

Enter the loan amount first. Add the rate and term. Read your monthly payment in your currency. See how the rate and term move it. Then test a few other numbers. Compare a few terms. Use it to plan a loan.

The limits of this calculator

This calculator has real limits. It assumes a fixed rate for the term. It does not include taxes or insurance. Some loans carry fees or points. A variable rate can change the payment. So treat it as a ballpark. So take the figure as a guide.

Common mistakes to avoid

A common mistake is ignoring the total interest. A low payment can still cost a lot. Another is leaving out taxes and insurance. Those add to the real monthly cost. Some pick the longest term by default. Others forget about fees. Clear math helps you steer around them.

A final tip

Use this to plan your mortgage. Remember each payment covers principal and interest. Watch how the rate and term move it. Look at the total cost, not just the payment. A shorter term saves on interest. Do not pick a term too long. Double-checking keeps the figure honest.

Frequently asked questions

What is mortgage amortization?

Amortization is how a fixed payment is split between interest and principal. Early on most goes to interest. Over time more goes to principal as the balance shrinks.

Why does so little go to principal at first?

Interest is charged on the outstanding balance, which is largest at the start. As the balance falls, the interest portion shrinks and principal repayment speeds up.

How do extra payments change the schedule?

Paying extra toward the principal shortens the term and saves interest, with the biggest effect in the early years.

Does my monthly payment change over time?

On a fixed-rate mortgage the payment stays the same. Only the split between interest and principal shifts.

What is the difference between principal and interest?

Principal repays the balance you owe, while interest is the lender's charge for the loan.