The interest rate your lender gives you isn't the true cost of your mortgage. Learn how to calculate your effective interest ...

To convert an annual interest rate to monthly, use the formula "i" divided by "n," or interest divided by payment periods. For example, to determine the monthly rate on a $1,200 loan with one year ...

Changing the loan amount in the calculator back to $200,000, and trying out a few interest rates, shows that an interest rate of 4.11% would produce that same $968 monthly payment.

R is the rate, or annual rate of interest, expressed as a decimal. If the interest rate is 2.5%, r is 0.025. n is the number of times that interest is compounded per period.

The interest rate generally does not include compounding interest in its calculations; for example, if you have a CD rate of 4.50% and the CD compounds interest daily, you'll actually be earning ...

Here's how the simple interest formula looks if the initial deposit is $1,000, the annual interest rate is 4% and the number of years is five. 200 = 1,000 x .04 x 5 ...

Everybody knows what an interest rate is—it’s effectively a percentage of an amount over a year. If your savings account earns you a 0.05% interest per year (which is a REALLY terrible ...

There are two interest rates posted with nearly every interest-bearing instrument: interest rate and annual percentage yield (APY). APY is the most important to you as an investor. Here’s why.