Free Calorie and BMI Calculator Widgets for Your Website

Free calculator widgets for your website

Add a calorie or BMI calculator to your blog, gym, coaching or clinic site in under a minute. Copy the code, paste it into any page, done. Free, no sign-up and no ads inside the widget.

Calorie calculator

Daily calorie needs (TDEE) and BMR with the Mifflin-St Jeor equation, plus targets for weight loss and gain.

Weight loss targets: Fixed (250 / 500 kcal less) Percentage (10 / 15 / 20% less)

Embed code

<iframe src="https://nutrinfo.net/embed/calorie/" title="Calorie calculator" width="100%" height="800" style="border:0;max-width:520px" loading="lazy"></iframe>
<p style="font-size:13px;margin:4px 0 0"><a href="https://nutrinfo.net/calculators/calorie/">Calorie calculator</a> by Nutrinfo</p>
<script>addEventListener("message",function(e){if(e.origin!=="https://nutrinfo.net"||!e.data||!e.data.nutrinfoEmbed)return;document.querySelectorAll("iframe").forEach(function(f){if(f.contentWindow===e.source)f.style.height=e.data.height+"px"})})</script>

BMI calculator

Body mass index with the WHO category and the healthy weight range for the visitor's height.

Embed code

<iframe src="https://nutrinfo.net/embed/bmi/" title="BMI calculator" width="100%" height="560" style="border:0;max-width:520px" loading="lazy"></iframe>
<p style="font-size:13px;margin:4px 0 0"><a href="https://nutrinfo.net/calculators/bmi/">BMI calculator</a> by Nutrinfo</p>
<script>addEventListener("message",function(e){if(e.origin!=="https://nutrinfo.net"||!e.data||!e.data.nutrinfoEmbed)return;document.querySelectorAll("iframe").forEach(function(f){if(f.contentWindow===e.source)f.style.height=e.data.height+"px"})})</script>

How to add it

WordPress: add a "Custom HTML" block and paste the code.
Wix, Squarespace, Webflow: use the "Embed code" or "HTML" element.
Any other site: paste the code into the page HTML where you want the calculator.

The last line of the code is a small script that resizes the calculator to fit its content on phones and desktops. If your site does not allow scripts, leave it out; the widget still works at a fixed height.

Terms

The widgets are free for any website. Please keep the credit line under the calculator. The calculators run in the visitor's browser; nothing they type is sent to us. Results are estimates for healthy adults and are not medical advice. How the numbers are worked out is explained on our methodology page.

Want a different calculator or size? Email [email protected].