**An online or virtual calculator** is a calculator that has been made as a computer program, instead of the regular physical hardware device that we always see.

**Virtual/Online calculators** offer operations for the user to chose one at a time, they can also be used to perform any process that consists of a sequence of steps each of which applies one of these operations.

**Online calculators have no separate purposes** other than these processes because the operations are the primary, or at least the primary, features of the calculator, instead of being secondary features that offer supports for other functionality that is not normally known simply as "calculation".

**As a calculator, instead of a computer, **they mostly, have a little set of relatively simple operations. Online calculators carry out short processes that are not computer-processor-intensive. Virtual calculators do not take in large amounts of input data so they don't produce many results.

**There is now a very broad range of virtual calculators,** and a single search on google for "Online Calculators" would bring up very large numbers of programs that are called calculators.

**The results are made up of numerical calculators** that carry out arithmetic operations or mathematical functions to numbers, and that bring about numerical results or graphs of numerical functions, together with some non-numerical tools and games that are also referred to as Online calculators.

**Many of the results that would come up** are calculators that do not act or simulate hardware calculators, but that take advantage of the greater power of computer software to carry out alternative types of calculators. Software calculators are provided on the Internet which is customizable to make use of any conceivable algebraic expression.

These user-customizable software calculators can also be used together with formula or equation creation features so that the software calculator can now be used to carry out all possible mathematical functions. You are no longer limited to a set of trigonometric and simple algebraic expressions, versions of the software calculator are now tailored to any and all topical applications.

There are several types of Online/Virtual Calculators, and below are some of them are:

**1. Numerical Calcuators: **
Every hardware calculator that we have has been implemented in software, that includes conversion, financial, graphing, programmable and scientific calculators.

There are software calculators that contain operations relevant to a specific application area and profession, including automotive, construction, and electrical engineering.

i. Love calculator: The input in this type of calculator is usually two names, and there is a button to work out the compatibility, as a percentage, of two the two people with these names.

ii. Formula weight calculator: The input here is a chemical molecular formula, using the symbols, and notation in the periodic table, and there is a button to work out the percentages of what it is made up of.

i. Sudoku calculators: The input is a Sudoku puzzle, the operations support solving the puzzle, such as selecting a digit as the solution for a cell, and the result is a solution of the entire puzzle.

ii. Poker calculators: A common feature of these is to calculate the odds of winning with a given Poker hand.

** There are many different services and variations for calculations** that are available on the internet ranging from regular virtual calculators to advanced calculators, there are no "world best" online calculators, so the list below is based on personal experiences and reviews online.

**Below is the list of the best online calculators.**

**1. Google Calculator**: Google Calculator sits at the top of this list because it is is a fairly common way to calculate anything without a calculator built into the operating system. To use it, just enter in any calculations in your google search bar and get instant results

**2. Special Calculators**: There are many specialized calculators that are, likened to Google calculator. For example sites like Desmos | Scientific Calculator, Limit Calculator and many other calculators online with all the necessary mathematical operations on them.

**3. Goods and Services Calculators **: Any e-commerce site or corporate website that offers services has calculators that are used to calculate products sold or their services. Most of them make use of similar calculators with the help of various already-made modules or plug-ins, and also make use of online builders, for example, uCalc. Such calculators are included in websites, online stores, and probably you have already seen them or even used such calculators on.

**4. Diverse Calculators**: There are many directories with calculators for spheres of human activity For example Love Calculators

**Using basic calculators such as Google Calculator** is very easy and would require you entering numbers and using your keyboard characters such as " +, -, *, / " for addition, subtraction, multiplication, and division.

**For online scientific calculators, we would be using this Scientific Calculator as an example: **

1. Press 'C' when you are starting a new calculation

2. Enter in a new equation using parenthesis and several other mathematical operators.

3. Use the already defined operations such as p (Pi), log, Exp to save time during the calculation process.

4. Make use of the memory function for calculating cumulative totals. Functions such as [M+]: Will add the displayed value to the memory. [MR]: Will bring out the value that is stored in memory. [MO: this function would take away the displayed value from the memory.

5. Be sure that you choose the angle unit (Deg or Rad) before beginning any of such calculations. Note: by default, Deg is selected