 # Question: How Mortgages Are Calculated?

To figure your mortgage payment, start by converting your annual interest rate to a monthly interest rate by dividing by 12.

Next, add 1 to the monthly rate.

Third, multiply the number of years in the term of the mortgage by 12 to calculate the number of monthly payments you’ll make.

## How is principal calculated on a mortgage?

Amortization is the monthly recalculation of principal and interest that takes place as you gradually pay down the principal of your mortgage. The APR is your interest rate. Divide your APR by 12 to get your monthly interest rate. For example, using an APR of 5 percent, 5 divided by 12 is 0.4166.

## How is a 30 year mortgage calculated?

Multiply 30 — the number of years of the loan — by the number of payments you make each year. For example, 30 X 12 = 360. You are making 360 payments over the course of the loan. Divide your mortgage interest rate by your total payments.

## How is interest on a mortgage calculated?

Computing Daily Interest of Your Mortgage

To compute daily interest for a loan payoff, take the principal balance times the interest rate and divide by 12 months, which will give you the monthly interest. Then divide the monthly interest by 30 days, which will equal the daily interest.