Transum Software

Compound Interest Calculator

A customised online calculator for quickly finding the solutions to compound interest problems.

Compound Interest Calculator Online Exercise Exam-Style More Calculator Activities
Present Value (PV):
Currency:
Number of years (n):
Interest rate (r):%
Compounding periods (k):%
Future Value (FV):
Interest (I):

Compound interest can be calculated by using the following formula to calculate the final amount or future value (FV)

$$FV = PV(1 + \frac{r}{100})^n $$

\(PV\) is the present value.

\(n\) is the number of years.

\(r\) is the rate of interest.

or by using the iterative function

$$x_{n+1} = x_n + \frac{x_n \times r}{100} $$

where \(x_0\) is the present value [See Calculator Workout Skill 16]

$$FV = PV(1 + \frac{r}{100k})^{kn} $$

\(PV\) is the present value.

\(n\) is the number of years.

\(r\) is the rate of interest.

\(k\) is the number of compounding periods per year.

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"This triangle starter is excellent. I have used it with all of my ks3 and ks4 classes and they are all totally focused when counting the triangles."

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"An absolutely brilliant resource. Only recently been discovered but is used daily with all my classes. It is particularly useful when things can be saved for further use. Thank you!"

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