Embed any calculator on your website
395 free calculator widgets you can drop into any page with a single iframe. Mortgage, BMI, concrete, ROI, and more. No JavaScript bundle, no CMS plugin, no signup.
How it works
Pick a calculator
Browse 395 calculators across 19 categories. Find one that fits your audience.
Copy the iframe
Each calculator page has an embed widget builder in the sidebar. Pick a size, copy the code.
Paste into your site
Works in WordPress, Webflow, Squarespace, plain HTML, or any CMS that allows custom HTML/embeds.
Try it live
Here's the Mortgage Calculator embedded on this page. Copy the code below to drop the same widget on your site.
Embed code
<iframe src="https://calc.cards/embed/finance/mortgage-calculator" width="600" height="700" frameborder="0" loading="lazy" title="Calc.Cards calculator" style="border:1px solid #e0e0e0;border-radius:8px;max-width:100%;" ></iframe>
Who uses these embeds
Mortgage brokers & realtors
Embed mortgage, affordability, and rent vs. buy calculators on your listings or blog. Visitors see real numbers, you stay top of mind.
Construction contractors
Concrete, paint, roofing, and material estimators on your services pages. Pre-qualify leads before they call.
Health & fitness sites
BMI, calorie, macro, and pace calculators give visitors a reason to stay. Better engagement, more pageviews.
Bloggers & content creators
Drop the right calculator next to the right article. Personal finance posts get mortgage and ROI calcs; cooking posts get recipe scaling.
Embed terms
- ✓Free for non-commercial and commercial use. Use embeds on personal blogs, business sites, agency client work — anywhere.
- ✓Attribution required. Each embed includes a small "Powered by Calc.Cards" link. Please don't hide or remove it.
- ✓No iframe sandbox tricks. Don't scrape the calculator and rehost it without the iframe. The widget needs to load from Calc.Cards for updates and bug fixes.
- ✓Need white-label or higher volume? Get in touch. We can offer custom-branded embeds and SLA-backed hosting for agencies and enterprise.
Browse calculators to embed
Click any category, pick a calculator, and grab the embed code from the sidebar.
Finance & Money
52 calculators
Health & Medical
38 calculators
Construction & Home
35 calculators
Math & Numbers
30 calculators
Unit Conversion
25 calculators
Memes
25 calculators
Fitness & Body
22 calculators
Science & Engineering
20 calculators
Business & Startup
18 calculators
Cooking & Kitchen
18 calculators
Automotive & Transport
16 calculators
Real Estate & Property
15 calculators
Time & Date
15 calculators
Education & GPA
14 calculators
Environmental & Energy
12 calculators
Pregnancy & Baby
12 calculators
Electronics & Tech
10 calculators
Travel & Geography
10 calculators
Pet Care
8 calculators