Free to embed · Embed Widget v3

Free Health Calculator
for your Website.

Four evidence-based calculators — TDEE, BMI, Macros and Body Fat — as a single-line iFrame. No account, no tracking, no cost.

4 Calculators|~9 kB initial payload|de · en · fr · es|0 Trackers
Online in 3 steps

One line of HTML. Nothing more.

  1. 1

    Choose a calculator

    Pick the calculator that fits your article — from TDEE to Body Fat.

  2. 2

    Copy the code

    One click. The snippet already includes recommended height, lazy-loading and border-radius.

    embed.html
    <iframe
  src="https://www.zen-health-hub.com/embed/en/tdee-calculator"
  width="100%" height="700"
  frameborder="0" loading="lazy"
  style="border:0;border-radius:12px;"
></iframe>
  3. 3

    Embed & done

    Paste the snippet into your blog editor. The widget adapts responsively and respects your blog's light mode.

Live Preview
zen-health-hub.com/embed/en/tdee-calculator
Preview is interactive — try the fields.
800 × 700 px
Available Calculators

Four calculators, one codebase.

All calculators share the same design system, performance budget and translations. Just swap the slug in the src attribute.

/tdee-calculator

TDEE Calculator

Daily calorie needs via Mifflin-St-Jeor.

SelectedDemo
/bmi-calculator

BMI Calculator

Body mass index incl. WHO categories.

Demo
/macro-calculator

Macro Calculator

Protein, carbs and fat per day.

Demo
/body-fat-calculator

Body Fat Calculator

Body fat percentage via U.S. Navy method.

Demo
Ready to embed?

Copy the snippet, paste into your blog, done.

Open live demo