This Calculator includes these features :

Age Calculator : Calculates your age in year, month and date from your date
of birth to ​current date.

Average Calculator : Calculates average between numbers entered by user.

Currency Converter : Conversion between four major currency : Indian rupee,
USD, Yen and Pound sterling.

GST Calculator : Calculates GST of given amount.

Percentage Calculator : Calculates percentage of given value to total value.

Unit Converter : Conversion between four major SI units these are :
Temperature, Length, Weight, and Time.