Home›Free Calculator Widget
Free to embed

Free calculator widget
for your website.

Embed any of thecalcu's 138 free calculators and converters on your blog or website. No API key, no account — pick a tool, copy the snippet, paste it in.

✓Pick a tool
2Configure
3Copy code
Choose a calculator or converter
All calculators and converters are available to embed.
Calculator
Width
Use 100% for full-width or a fixed px value
Height
Minimum 400px recommended
Preview
This is how the embed will appear on your page.
Embed Preview
thecalcu
Annuity Calculator
Annuity Calculator
Input 1
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Input 2
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Input 3
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Result
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Powered by thecalcu.com
Your embed code
Copy and paste this HTML snippet anywhere on your page.
<iframe
  src="https://thecalcu.com/embed/annuity-calculator/"
  width="100%"
  height="500"
  style="border:none;border-radius:10px;"
  title="Annuity Calculator — thecalcu"
  loading="lazy"
></iframe>
Open live previewView full calculator →Free to use. Attribution required.
⚡
Real-time calculations
Results update instantly as users type or adjust sliders.
📱
Fully responsive
Works on all screen sizes without extra configuration.
🎨
Consistent design
Clean, minimal UI that fits most website styles.
🔒
No API key needed
Copy the snippet and it just works. No account required.
🆓
Free forever
Embed any calculator or converter at no cost.
✅
Attribution only
"Powered by thecalcu.com" link is the only requirement.

Who uses the embed widget?

Publishers across finance, health, education, and real estate embed thecalcu tools to give their readers instant, interactive calculations — without building anything themselves.

💰
Finance bloggers
Embed SIP, EMI, compound interest, or CAGR calculators inside articles about investing or loans.
🏥
Health & fitness sites
Add BMI, calorie, body fat, or BMR calculators to nutrition and wellness articles.
🏠
Real estate portals
Embed home loan EMI and down payment calculators on property listing and buying-guide pages.
🧾
Tax & CA professionals
Add GST, income tax, HRA, or TDS calculators to service pages and client-facing guides.
📚
Education platforms
Embed percentage, average, LCM, or area calculators inside maths and science lessons.
👔
HR & payroll tools
Add the salary / CTC or gratuity calculator to HR guides and payroll explainers.

Optional attribution badge

The iframe already includes a "Powered by thecalcu.com" footer. If you'd like to add a standalone badge in your article text as well, copy this snippet:

Preview
Calculator by thecalcu.com
HTML
<a href="https://thecalcu.com" target="_blank" rel="noopener"
  style="display:inline-flex;align-items:center;gap:5px;font-family:sans-serif;
         font-size:12px;color:#64748B;text-decoration:none;padding:6px 12px;
         border:1px solid #E2E6ED;border-radius:6px;background:#FFFFFF;">
  Calculator by <strong style="color:#2F6FED">thecalcu.com</strong>
</a>

Frequently asked questions

How do I embed a free calculator on my website?
Select a calculator from the dropdown on this page, adjust the width and height to fit your layout, then copy the generated HTML snippet. Paste it into your page's HTML wherever you want the calculator to appear. The embed works on any platform that allows custom HTML — including WordPress, Blogger, Webflow, Wix, and plain HTML pages.
Is the thecalcu embed widget free to use?
Yes, completely free. There is no cost, no account required, and no API key. The only condition is keeping the "Powered by thecalcu.com" attribution link that appears at the bottom of every embed.
Do I need an API key or account to embed calculators?
No. Copy the HTML snippet, paste it into your page, and it works immediately. All calculations run inside the iframe served from thecalcu.com — nothing to install, configure, or maintain on your end.
Which calculators and converters can I embed?
All 101 calculators and 37 converters on thecalcu.com are available to embed — including SIP, EMI, GST, income tax, BMI, compound interest, unit converters, and more. Every tool on the platform is embeddable.
What dimensions should I use for the embed?
A width of 100% is recommended for responsive layouts — it adapts to the container width automatically. For height, most calculators work well at 500–600px. Calculators with more inputs (such as the income tax calculator) may need 700–800px. The preview on this page gives a rough indication.
Can I embed calculators on WordPress, Wix, or Squarespace?
Yes. On WordPress use a Custom HTML block in the Gutenberg editor. On Wix use an HTML widget. On Squarespace use a Code Block. On Blogger switch to HTML view and paste the snippet. Any platform that allows embedding raw HTML will work.
Is attribution required to use the embed widget?
Yes. The "Powered by thecalcu.com" link that appears at the bottom of each embed must remain visible and unmodified. This is the only condition for free use — no fee, no sign-up, no other restrictions.