Embed Free Calculators on Your Website
Add any of our 8,500+ calculators to your site in under 30 seconds. No signup, no fees, no limits. The widget auto-resizes and works on all devices.
How It Works
Pick a calculator
Browse any of our 8,500+ calculators and click the Embed button in the toolbar.
Copy the code
A short iframe snippet is generated automatically. Click "Copy Code" to grab it.
Paste on your site
Drop the snippet into any HTML page, WordPress post, or site builder. The widget auto-resizes to fit.
Live Preview
This is exactly what visitors on your site will see:
Embed code:
<iframe id="mortgage-calculator" src="https://www.ultimatefinancecalculator.com/calculators/widgets/mortgage-calculator" style="border:0;width:100%;min-height:500px"></iframe>
<script>
const iframe=document.getElementById("mortgage-calculator");
window.addEventListener('message',(event)=>{
if(event.origin!=="https://www.ultimatefinancecalculator.com")return;
if(event?.data?.eventName==='SET_HEIGHT'&&event?.data?.payload?.height){
iframe.style.height=event.data.payload.height+"px";
}
});
</script>Built For Your Industry
Real Estate & Mortgage
Give your visitors instant mortgage payment estimates, affordability checks, and amortization schedules.
Finance Blogs & Educators
Enhance articles with interactive compound interest, retirement, and investment calculators.
Construction & Home Improvement
Help contractors and DIYers estimate materials, costs, and project dimensions.
Popular Calculators to Embed
Mortgage Calculator
Monthly payments, amortization schedules, and total interest for home loans.
Compound Interest Calculator
See how investments grow over time with compound interest.
Loan Calculator
Monthly payment, total cost, and payoff schedule for any loan.
Retirement Calculator
Estimate how much you need to save for a comfortable retirement.
BMI Calculator
Calculate Body Mass Index from height and weight.
Tip Calculator
Split tips and bills between any number of people.
Concrete Calculator
Estimate cubic yards and bags of concrete needed for your project.
Percentage Calculator
Calculate percentages, increases, decreases, and differences.
Solar Panel Calculator
Estimate array size and savings for a solar installation.
Auto Loan Calculator
Monthly payments and total cost for vehicle financing.
Investment Calculator
Project future value of investments with regular contributions.
Calorie Calculator
Estimate daily calorie needs based on age, weight, and activity.
Why Embed Our Calculators?
Always Free
No fees, no usage limits, no signup required.
Quick Setup
Copy one code snippet and paste it anywhere.
Responsive
Auto-resizes to fit any screen or container.
Calculators
Finance, math, health, construction, and more.
Frequently Asked Questions
Is it really free?+
Yes. There are no fees, no usage limits, and no signup. Embed as many calculators as you want on as many pages as you need.
Will it slow down my website?+
No. The widget loads in an iframe which doesn't block your page. Add loading="lazy" to the iframe tag to defer loading until the user scrolls to it.
Can I customize the look?+
The widget uses a clean, neutral design that fits most sites. For custom branding or white-label solutions, contact us.
Does the embed include ads?+
No. Embedded widgets are ad-free to keep the experience clean for your visitors.
Works with WordPress, Wix, Squarespace?+
Yes. The embed code works on any platform that supports HTML or iframes, including WordPress, Wix, Squarespace, Webflow, Shopify, and custom-built sites.
Need a Custom Calculator?
We build bespoke calculators tailored to your brand and business logic.
Learn More