Continuously Interest Formula Math
The importance of this article is to get you excited about compound interest and to teach you the ability to understand the continuous compound interest formula.
Continuously interest formula math. To calculate continuously compounded interest use the formula below. In the formula a represents the final amount in the account that starts with an initial principal p using interest rate r for t years. A p e r t 11 44 p e 0 04 6 11 44 p e 0 24 11 44 e 0 24 p 9 p. A woman deposits 5 000 into a savings account with continuously compounded interest at an annual rate of 4 5.
Future value fv pv x 1 i n n x t. Interest that is hypothetically computed and added to the balance of an account every instant. In my second equation you can see how the thing inside the large parens is of this form and therefore we can use the authors statement to jump right to the limit. If it took 6 years for your initial amount compounded continuously at an interest rate of 4 and you ended up with 11 44 then your initial principal was 9.
Begingroup i did that so that i d get a limit that looked like the one that the authors had given 1 frac 1 n n. I prt for the above calculation you have 4 500 00 to invest or borrow with a rate of 9 5 percent for a six year period of time. Total interest earned principal 1 interest rate time 1 total interest earned 1 000 1 06 5 1 338 23. Like it just suddenly clicked.
The formula for continuous compounding is derived from the formula for the future value of an interest bearing investment. T term of investment in years example. R annual interest rate. Average annual interest total interest earned time average annual interest 338 23 5 67 65.
Continuously compounded interest is a great thing when you are earning it. S final dollar value. P principal dollars invested. This formula makes use of the mathemetical constant e.
This is not actually possible but continuous compounding is well defined nevertheless as the upper bound of regular compound interest the formula given below is sometimes called the shampoo formula pert. When you know the principal amount the rate and the time the amount of interest can be calculated by using the formula.