When you can get calculator apps on your phone or find the cheapest calculator at a local stationer for just a few pounds, why would anyone choose to look for a calculator online?

Well, as it turns out, there are many calculations that are difficult to perform on a physical calculator without instruction. Online calculators can either perform a certain function for you, or they can explain to you how to perform that function yourself.

You can also find plenty of calculators online that are specifically designed to perform one type of calculation. A Body Mass Index (BMI) calculator is a good example of an online tool that performs one tricky calculation very quickly and easily for the user, but that would take the user much longer to figure out with just a regular calculator.

So whether you are looking for simple free online calculators, something to perform scientific calculations, or even the best graphing calculator, look no further as we go through the top 5 online mathematical calculators.

## What are the top 5 online mathematical calculators?

Although there are countless online calculators to choose from, GCF-LCM, Online Calculator, Desmos, Good Calculators, and Calculator-1, all stand out. Each of them is, in our opinion, the best calculator for performing the function they opt to perform.

Every calculator we have chosen is also remarkable for its simplicity and its clear instructions on how to use it.

So let’s jump in and take a look at the list of the best online mathematical calculators.

## 1. GCF LCM

GCF-LCM is a great online math calculator that has a very niche function. The GCF-LCM calculator allows you to calculate the Greatest Common Factor (GCF) and the Least Common Multiple (LCM) of two or more numbers.

The Greatest Common Factor is the largest factor that a group of numbers share. For example, 20, 16, and 44 have two common factors: 2 and 4. 4 is the largest (or greatest) of the two, so the Greatest Common Factor or 20,16, and 44 is 4.

The Least Common Multiple essentially works the other way and is the smallest possible integer shared by a group of numbers. For example, the Least Common Multiple of 6, 10, and 15 is 30 as all three numbers go into 30 and 30 is the lowest of all the numbers all three go into.

The GCF-LCM calculator is simple and user friendly. It works out either the Greatest Common Factor or the Lowest Common Multiple within seconds and then provides you with a thorough explanation and formulas.

## 2. Desmos

Desmos is an advanced online scientific calculator that is for real mathematics whizzes. It allows users to make calculations using pie values, percentages, round numbers, powers, angle degrees, and radians.

What sets Desmos even further apart from other online scientific calculators is that it also has other settings available such as graphing calculators and a four-function calculator. Its graphing calculator is one of the easiest to use and best graphing calculators available online. You can also enter letters and special characters, allowing you to perform highly specialized calculations.

## 3. Good Calculators

The simply titled Good Calculators is a website that contains over 300 calculators which can be used to solve all sorts of mathematical or business questions. All of the calculators are completely free and are designed to be simple for anyone to use.

You can find calculators specifically designed for working out your salary after income tax, retirement funds, mortgages, contracts, loans, asset depreciation, 2D and 3D shapes, GPA, logistics, sales and investments, human resource management, and many other types of calculators.

Each calculator comes with an explainer at the start to make sure you use it correctly.

## 4. Calculator-1

Calculator-1 is a large, no-nonsense, easy to use online calculator. It has a basic version, a scientific version, a root version, and a percentage. Each option is convenient and very simple to operate.

Although there are literally thousands of online calculators that offer such simplicity, we have chosen this one in particular for its big imaging and very simple user interface. Calculator-1 is perfect for people who know how to use a calculator and want something quick to use for basic calculations.

## 5. Online Calculator

Online Calculator is, as its name suggests, an online calculator. Their slogan is “everybody needs a calculator at some point”.

But aside from the simplicity of their model, Online Calculator offers a number of very niche calculators that may come in handy when you least expect it. It offers users different options for different types of calculations such as a BMI calculator, distance converter, ring size converter, patio calculator, scientific calculator, weight converter, stopwatch, random name picker, etc.

So, if you are looking for a calculator that is very particular and easy to use, Online Calculator could well be for you.

## What are the benefits of using an online calculator?

Online calculators can be great for businesses that require specific calculations that come with big graphics. For example, you may be preparing a presentation, and an online calculator can be a very useful tool in displaying a specific calculation on a big projection as part of the presentation.

Online calculators are also handy for students or schoolchildren who need an advanced calculator but do not have one to hand. The benefit of an online calculator is that you will also usually be able to find instructions on how to use it, whereas, with a physical calculator, you have to figure it out yourself.

Online calculators can also be perfect if you are looking for a very specific calculation. For example, calculating your taxes, your calorie intake, your hourly salary, you name it, and you can find an online calculator dedicated to that specific line of inquiry.

## Summary

You can find online calculators for every sort of calculation you can think of. Of the thousands of online calculators available for free on the web, we have chosen GCF LCM, Online Calculator, Desmos, Good Calculators, and Calculator-1, as the top five. Each of these is great at performing the function it offers, is easy to use, and is well instructed for anyone who needs the extra help.