# Simple interest free online calculation

Simple interest calculation formula.

The simple interest amount is equal to the principal amount times the annual interest rate divided by the number of periods per year m, times the number of periods n:

simple interest amount = principal amount × (rate / m) × n

#### Example

Calculate the simple interest amount of principal amount of \$5,000, annual interest rate of 6% and time of 18 months.

Solution:

principal amount = \$5,000

rate = 6%

m = 12 months/year

n = 18 months

simple interest amount = \$5,000 × (6% / 12months/year) × 18months

= \$5,000 × (0.06 / 12months/year) × 18months

= \$450

Simple interest calculator »

Currently, we have around 5664 calculators, conversion tables and usefull online tools and software features for students, teaching and teachers, designers and simply for everyone.

There are many very usefull online free tools and we would be happy if you share our page to others or send us any suggestions for other tools which will come on your mind. Also in case you find any of our tools that it does not work properly or need a better translation - please let us know. Our tools will make your life easier or simply help you to do your work or duties faster and in more effective way.

These below are the most commonly used by many users all over the world.

And we are still developing more. Our goal is to become the one-stop, go-to site for people who need to make quick calculations or who need to find quick answer for basic conversions.

Additionally, we believe the internet should be a source of free information. Therefore, all of our tools and services are completely free, with no registration required. We coded and developed each calculator individually and put each one through strict, comprehensive testing. However, please inform us if you notice even the slightest error – your input is extremely valuable to us. While most calculators on Justfreetools.com are designed to be universally applicable for worldwide usage, some are for specific countries only.

Page Id: 66