Interest Calculator
This is a collection of simple interest calculators that calculate initial value, final value, annual interest rate, or duration by rearranging the formula below. Each calculator solves for a different parameter, which are defined below. Use the table of contents on the right to navigate to the calculator you need.
\[
F = P\left(1+\frac{i}{f}\right)^{nf}
\]
Definitions
| Variable | Definition | Unit |
|---|---|---|
| \(F\) | Final/future value | $ |
| \(P\) | Initial/present value | $ |
| \(i\) | Annual interest rate | % |
| \(f\) | Compound frequency | /yr |
| \(n\) | Duration in years | yr |
Final Value
How much will I have in \(n\) years?
| Label | Input |
|---|---|
Initial Value $ |
|
Interest Rate % |
|
Duration yr |
|
Frequency /yr |
|
Final Value $ |
N/A |
Initial Value
How much do I need to put in to have \(\$F\) in \(n\) years?
| Label | Input |
|---|---|
Final Value $ |
|
Interest Rate % |
|
Duration yr |
|
Frequency /yr |
|
Initial Value $ |
N/A |
Annual Interest Rate
I deposited \(\$P\) amount \(n\) years ago, now I have \(\$F\), what was my annual interest rate?
| Label | Input |
|---|---|
Initial Value $ |
|
Final Value $ |
|
Duration yr |
|
Frequency /yr |
|
Interest Rate % |
N/A |
Duration
How long do I need to wait to have \(\$F\) in my account?
| Label | Input |
|---|---|
Initial Value $ |
|
Final Value $ |
|
Interest Rate % |
|
Frequency /yr |
|
Duration yr |
N/A |