Free For Any Website

Embed Our Calculators

Add professional fitness calculators to your website, blog, or app with a single line of code. Free forever. No API key needed.

How It Works

Choose a calculator below, copy the embed code, and paste it into your website. The widget automatically adapts to your page width and looks great on mobile. Each embed includes a small "Powered by Global Muscle Summit" attribution link.

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1. Choose

Pick the calculator you want

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2. Copy

Copy the one-line embed code

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3. Paste

Add it to your HTML — done!

Available Calculators

BMI Calculator

Body Mass Index calculator with imperial and metric support. Interactive, mobile-friendly, instant results.

<div data-gms-calc="bmi"></div><script src="https://globalmusclesummit.com/embed/gms-embed.js"></script>

TDEE Calculator

Total Daily Energy Expenditure calculator. Computes BMR via Mifflin-St Jeor and adjusts for activity level.

<div data-gms-calc="tdee"></div><script src="https://globalmusclesummit.com/embed/gms-embed.js"></script>

Macro Calculator

Protein, carb, and fat calculator for cutting, bulking, or maintenance goals.

<div data-gms-calc="macro"></div><script src="https://globalmusclesummit.com/embed/gms-embed.js"></script>

One-Rep Max Calculator

Estimate 1RM from submaximal lifts using Epley and Brzycki formulas.

<div data-gms-calc="1rm"></div><script src="https://globalmusclesummit.com/embed/gms-embed.js"></script>

Body Fat Calculator

U.S. Navy method body fat estimator using tape measurements.

<div data-gms-calc="bodyfat"></div><script src="https://globalmusclesummit.com/embed/gms-embed.js"></script>

Heart Rate Zone Calculator

Calculate five training heart rate zones using the Karvonen method.

<div data-gms-calc="heartrate"></div><script src="https://globalmusclesummit.com/embed/gms-embed.js"></script>

Integration Guide

Basic Usage

Paste the embed code anywhere in your HTML body. The calculator will render where the <div> element is placed.

Multiple Calculators

You can embed multiple calculators on one page. Just add multiple data-gms-calc divs — the script only needs to be included once:

<div data-gms-calc="bmi"></div> <div data-gms-calc="tdee"></div> <div data-gms-calc="macro"></div> <script src="https://globalmusclesummit.com/embed/gms-embed.js"></script>

WordPress

Use a Custom HTML block in the WordPress editor and paste the embed code. Works with Gutenberg, Elementor, Divi, and all major page builders.

React / Next.js

Load the script dynamically in a useEffect hook or use a <Script> component with strategy="lazyOnload".

Terms of Use

Our embeddable calculators are free for commercial and personal use. The only requirement is that the "Powered by Global Muscle Summit" attribution link remains visible and unmodified. Removing or hiding the attribution is prohibited.

Questions? Contact us.