Calculator is commonly used to solve basic mathematical operations such as multiplication, division, addition and subtraction. Calculator in Windows 7 offers lot of advance features such as programming, scientific and statistics.

How to open Calculator:

- Click Start > Run (Windows + R – shortcut for Run Dialog)
- Type calc and hit enter.

Or

- Click Start > All Programs > Accessories > Calculator

Advanced features and their usage:

**Basic** – Performs basic operations (add, subtract, multiply, divide)

**Scientific** – In this mode you can perform scientific operations like cos, sin, tan, etc.

**Programmer** – this mode of calculator will allow you to compute binary digit, decimal, etc. This mode is very useful for programmer.

**Statistics** – Performs the basic scientific operations like getting the mean and the computing the sum of numbers added to the data set.

**Unit Conversion** – it allow you to convert units to other units.

Example: you can a value from a Degree Celsius to Degree Fahrenheit and vice versa.

**Date Calculation** – using this feature you can easily calculate the difference between two dates.

**Worksheets** – there are four options you can choose from: Mortgage, Vehicle Lease, Fuel Economy (mpg), or Fuel Economy (l/100 km).