Free embed widgets
Free calculator widgets for your website
Put a mortgage, loan, tax or savings calculator on your own page in one line of HTML. No account, no API key, and nothing to pay — for you or your readers.
One line of HTML
Paste it anywhere
<iframe
src="https://calculatorai.app/embed/mortgage-calculator"
width="100%" height="1100"
loading="lazy"
></iframe>Nothing to run
Every calculation happens in your reader’s browser. There is no server of ours doing work per visitor, so there is no bill, no API key and no traffic ceiling. A page with the widget can be read a million times and the number stays zero.
No ads, no watermark
Nothing is advertised inside the widget and nothing it produces is stamped. One small credit line sits under the frame linking back to us — that is the entire arrangement, and it is the same for everybody.
It will not slow your page
The frame is lazy-loaded, so it does not start downloading until a reader scrolls near it, and it never blocks your own content from painting.
About two minutes
How to add a calculator to your site
Pick a calculator
Choose any of the calculators on the site — mortgage, loan, salary, tax, savings, and the rest.
Set language, currency, theme
Match it to your audience and your design. The builder writes the snippet as you change the settings.
Paste it into your page
Copy the block and drop it into an HTML or embed element. That is the whole installation.
Which calculator belongs on your site
Every calculator on CalculatorAI can be embedded. These are the ones people put on their pages most, and who puts them there.
Mortgage brokers and estate agents
The first question every client asks is "what would my payment be?". Answer it on your own page instead of sending them to someone else's.
Personal finance blogs
An article that tells the reader to "work out the interest" and then makes them leave to do it loses the reader.
Freelance and small-business sites
Pricing, tax and take-home questions, answered inline while someone is reading about them.
Retirement and investing writers
Long-horizon numbers are the ones readers most want to try with their own figures.
Works anywhere you can paste HTML
Where the widget works
WordPress
Paste into a Custom HTML block. Works on self-hosted WordPress.
Webflow
Drop an Embed element on the page and paste.
Squarespace
Use a Code block.
Wix
Add an "Embed HTML" element.
Ghost
Insert an HTML card.
Plain HTML
Paste anywhere in the page body.
One honest caveat. Some hosted platforms strip the small script that ships with the snippet. The calculator still works — only the automatic height adjustment stops, so the frame keeps the height written in the snippet instead of shrinking to fit. You can set that height yourself.
What you control
- Interface language — ten available, so the widget speaks your readers’ language.
- Currency — pin one, so a UK blog’s readers are not shown dollars.
- Theme — light, dark, or follow the reader’s own system setting.
- Width and height, to match your layout.
- Which calculator, obviously — any of them.
What you cannot
- Remove the credit link. It is what the widget is exchanged for, and it is identical for every site.
- Change the credit link’s wording. Everyone gets the same branded anchor — per-site keyword links would turn this into something search engines penalise us both for.
- Change the maths. Rates and formulas are ours to keep correct, and that is the point of using them.
Frequently asked questions
What the widget costs, what it does to your page speed, what you can restyle, and what happens on platforms that strip scripts.
01Is the calculator widget really free?
02Will it cost me anything to run on my traffic?
03Does it slow my page down?
04Are there ads or watermarks inside the widget?
05Can I change the language, currency or colours?
06What happens on a platform that strips scripts?
07Do you collect data about my visitors?
Put a calculator on your page
Pick one, set the language and currency, copy the snippet. Free, permanently, with nothing to run.