Simple Interest Calculator
Use the Simple Interest Calculator to determine how much interest you would pay or receive by borrowing or lending a given amount of money (principal) at a fixed annual rate of return for a specified period in years.
For example, if you borrow $1,000 at a 5 percent annual rate of return, after 10 years you would have paid $500 in interest. If you lend $1,000 at a 5 percent annual rate of return, after 10 years you would have received $500 in interest.
With simple interest all payments are equal.
On the calculator form, enter only numbers (with or without decimal points).
Do not enter currency symbols like dollar signs, commas or percent signs.