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.

Advanced feature:
To calculate depreciation use a negative interest rate (r).

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Learning and understanding Mathematics, at every level, requires learner engagement. Mathematics is not a spectator sport. Sometimes traditional teaching fails to actively involve students. One way to address the problem is through the use of interactive activities and this web site provides many of those. The Go Maths main page links to more activities designed for students in upper Secondary/High school.

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