10 Best Online Calculator Apps In JavaScript (2026 Update)
Calculator is a must-have tool for all users, even if you know how to add, subtract, multiply and divide digits. It saves you time when doing some simple math: for example, it takes just several seconds to get the result 27×84=2268.
An online calculator is a web-based tool that helps in performing mathematical operations. JavaScript offers an easy solution to this problem. Here are the 10 best JavaScript libraries and jQuery plugins for creating online calculator web applications with ease. Let's get started.
Originally Published May 26 2022, updated Jan 21 2026
Table of contents
Best jQuery Online Calculators
Simple Calculator App Styled With Bootstrap 5
Make a simple online calculator app styled with the latest Bootstrap 5 framework.
Simple Online Calculator Created With jQuery
A simple online calculator created with jQuery.
iOS Inspired Web Calculator Built With jQuery
Use HTML, CSS, and jQuery to build a clean and easy-to-use web-based calculator that is inspired by the iOS calculator app. It has the most basic functions of a calculator, such as addition, subtraction, multiplication, division, reset, and percentage.
Simple jQuery and HTML Calculator
A simple online calculator app built with JavaScript (jQuery) and HTML table.
Multilingual Simple & Scientific Calculator Plugin
A jQuery plugin that pops up a simple or scientific calculator to an input field on focus. Clicking the USE button on the calculator will insert the current value to your input field.
Customizable Scientific Calculator In jQuery - jsRapCalculator
A JavaScript library used to create a customizable, well-designed scientific calculator web app using jQuery.
Simple Material Design Calculator With jQuery - calculator.js
A simple-to-use, Material Design styled calculator web app built using jQuery and Bootstrap framework.
Best Vanilla JS Online Calculators
Replicate iOS Calculator With Plain JavaScript
An iOS-like web calculator created using plain JavaScript and CSS.
Create A Responsive iOS-Inspired Calculator In JavaScript/CSS
The iPhone Style Calculator project brings the simplicity and sleek look of the Apple iPhone’s calculator to the web. Built with HTML, CSS, and JavaScript.
Neumorphic Style Calculator App In JavaScript
A Neumorphic style calculator web app built with JavaScript and Bootstrap 5 framework.
Bonus
Sometimes you may need to perform mathematical calculations on the values of elements then the following plugins you may find useful.
Animated Binary/Decimal Calculator In jQuery
A jQuery/JavaScript (ES6) script that helps you create simple, animated calculators to perform the addition of two binary or decimal values.
Do Calculations On Multiple Form Fields - jQuery jAutoCalc
AutoCalc is a jQuery plugin created for the shopping cart of your online store that allows to dynamically calculate the values of your form fields similar to the Excel.
jQuery Plugin For Flexible Loan and Interest Calculation - Accrue.js
A simple, fast, flexible jQuery plugin (less than 7 kb) for providing loan and interest calculations e.g. loan amortization schedule, interest comparison calculator on your web page.
jQuery Plugin For Calculation Form or Calculation Table - Calx
Calx is an easy-to-use yet powerful jQuery plugin that allows you to create a calculation form or calculation table for your E-commerce website or sale page.
Sum Total of Row and Column In Table - jQuery tableTotal
Yet another jQuery table data calculation plugin that allows to calculate column and row sum in your html table.
Table Data Calculation Plugin For jQuery - SumTableTotal
A small jQuery plugin that adds a total row to your HTML table and displays the sum of columns you specify.
Conclusion:
Throughout this collection of JavaScript libraries and plugins, we have learned that the best resources are not only advanced and powerful but they take into account the user.
These plugins enable the user to navigate through a webpage with ease, making it easier to perform mathematical calculations. Hopefully, these 10 best online calculator apps in JavaScript will prove as useful to you as a developer as they have been for us in writing this list.
More Resources
Looking for more jQuery plugins or JavaScript/CSS libraries to create Online Calculators on the web & mobile? See jQuery Calculator and JavaScript Calculator sections for more details.
