Where to Get Free Embeddable Calculators for Your Website or Blog

Help your website visitors do the math. (Source: Wikimedia)
Help your website visitors do the math. (Source: Wikimedia)

Embedding a calculator on your website or blog is a great way to keep visitors on your pages longer. Rather than going off-site to make a computation, your visitors can make quick calculations right on your website, which not only saves them time, but also makes them more likely to bookmark and share your site with friends.

If you don't know how to write your calculator codes in HTML, Javascript, or PHP, there are many free calculator source codes and widgets available. All you have to do is copy and paste the code into the section of your blog or website where you want the calculator to appear. Below is a list of websites that offer free calculators for other webmasters to add to their own webpages.

The List

  • BMI Club Interactive Body Mass Index Calculator: Slide the buttons along the height and weight axes to see how your BMI changes. The coolest thing about this calculator is the human body model whose proportions change as you vary the height and weight. This calculator is somewhat larger than a typical sidebar widget, so it's best to embed this in the main content area of your webpage.
  • Had2Know Free Website Calcs: Features free-to-embed calculators for a variety of niche site topics such as finance, health, math, construction, or gardening. Their compact size make them ideal for sidebar widgets, and the neutral colors will work with almost any website color scheme.
  • Practical Money Skills Financial Calculators: If your website covers retirement planning, savings, investing, real estate, or loans, you'll find a wide selection of specialized financial calculators here. These calculators fit nicely into the main content area.
  • Payscale.com Salary Calc: If your visitors need to know the avage salaries and hourly wages of various jobs, you can embed this free salary calculator into the main section or side column of your blog or website. Visitors enter the job title and location, and results page opens in a new window.
  • Jimmy Beans Wool Knitting Calculator: For craft bloggers, insert a link on your site that opens up a small, unobtrusive pop-up knitting calculator. Visitors enter the specifications of their knitting project, and the calculator tells them how many yards of yarn they need to get the job done.
  • UK Mortgage Rates Calculator: For Brits who don't want $ signs on their calculators, use this free embeddable mortgage calc where the amounts are specified in pounds, £.
  • Children's Growth Chart: Enter a child's age and weight and the calculator will tell you how he or she compares to other children of the same age. This is well-designed and easy to use applet makes a nice addition to parenting blogs, children's health sites, or general health sites.
  • Auto Loan Calculator: This sleek calculator not only gives you the monthly payments of a car loan, but also shows a bar graph of the payment schedule. The widget comes in two widths: 170px and 300px, so it can either fit in the side bar or main area.

  • Another Auto Loan Calculator: This calculator has a simpler design and quickly outputs the monthly payment when you input the car's price (principal), the interest rate %, and the number of years.
  • Web Winder Free Embeddable JavaScript Calcs: Choose from 22 interesting and uncommon computation tools, such as an MLM commissions calc, tutoring calc, self-grading quiz, and much more. The calculators are in a large format, suitable for a wide page, but if you know enough CSS and HTML you can easily reformat them to a more compact size.
  • About.com Free JS Calculators: The Javascript section of About.com offers free scripts for inserting many kinds of interactive calculators in your webpages. You can find calcs for loans, cross stitching, piano chords, color mixing, and more. You may need to adjust the colors, sizes, and alignments using CSS in order to make them match your website's design.
  • Instacalc Online Wonder: This embeddable calculator is similar to the computation engine build into Google Search. You can enter any mathematical query and Instacalc will give you the answer you are looking for. For example, visitors can enter phrases like "3 million plus 10%" or "7 inches to cm" and get the correct answer without having to do any math. Great for educational websites.
  • Calculator Pro: Each of their on-site calculators comes with an option to embed the code in your own website. The calculators are not as sophisticated as what you can find on other sites; many require only one or two inputs. However, the size of their selection makes up for the simple nature of their tools, and you can find calculators for any niche.
  • Frograte Mortgage Calculator: One best free embeddable home loan calculator because it solves for any of the 4 variables--principal, interest, years, and payment--when you input any subset of 3. Its small size makes it ideal for a sidebar widget.

Non-Embeddable Calculators That Are Free to Use

Many websites provide free online calculators that you can use on-page, but you are not allowed to embed them withing your own websites. You may link to these calculators so that your visitors can perform computations more easily. Here is a list of the best online calculator directories:

Top 10 Online Calculator Directories

And here is a list of the best online graphing and scientific calculators for general use

Top Online Graphing and Scientific Calculators

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Comments 5 comments

calculus-geometry profile image

calculus-geometry 4 years ago from Germany

That's a long list of free resources! But if a website owner needs something more particular, he/she will probably have to code it him/herself or purchase it custom made.

paxwill profile image

paxwill 4 years ago from France Author


In case someone prefers to code their own calculators, Tizag.com and PHP.net have a lot of free tutorials on how to make web calcs in javascrtipt or PHP.

Lady_E profile image

Lady_E 4 years ago from London, UK

That's a handy tool for a website.

Thanks for sharing.

CMHypno profile image

CMHypno 4 years ago from Other Side of the Sun

Thanks for this information as embedding a calculator is not something I had ever thought of before, and I can see how it would be useful to the user and keep them on the page for longer

Andre De Oliveira 4 weeks ago

Thank you for such a good information:)

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