Count number of characters in a string

Change centimeters into feet change the height of a person from centimeters to feet. Imperial to metric converter

Work out the compound interest rate

See how much your smoking habit costs.

Convert decimal (Base 10) to binary (Base 2)

A easy to use application to convert temperatures in Fahrenheit to Celsius

Generate a list of Fibonacci numbers in sequence

Calculate the annual earning based on number of hours worked

Calculate the area of a circle with no pi but just a diameter