Free Embeddable Fitness Calculators

Add a free TDEE calculator to your fitness blog, gym site, or health resource. Copy the snippet below. No signup, no API key, no maintenance.

Available Embeds

TDEE Calculator

Total Daily Energy Expenditure based on Mifflin-St Jeor. Imperial and metric units.

Free Embed

TDEE Calculator Embed

Live preview:

Copy this snippet:

<iframe src="https://fitnitapp.com/embed/tdee-calculator" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:480px;" title="TDEE Calculator by Fitnit"></iframe>

Why Embed?

Give your readers a useful tool without building one from scratch.
The calculator is self-contained — no API keys, no JS dependencies, no maintenance on your end.
Imperial and metric units, mobile-responsive, accessible.
Free forever. The widget includes a small "Powered by Fitnit" credit linking to the full version.

Want a Different Calculator?

BMR, macro, body fat, and 1RM embeddable versions are on the roadmap. Let us know which one would help your site most.