Embed the free TDEE calculator

Why bother embedding someone else's calculator?

Because building and maintaining your own TDEE calculator — getting the Mifflin-St Jeor formula right, handling activity multipliers, keeping it responsive on mobile — is real work for something that's a small part of your site. This one is already built, already correct, and free. Drop it in, your readers get a genuinely useful tool, and you never touch the maths.

Pick a size

Same calculator, three common sizes. Compact fits the form; results scroll inside the box. Standard and Full show the whole result card with no scrolling. Click one, copy the code below it.

<iframe src="https://nononsensefitness.ie/embed/tdee-calculator"
        width="100%" height="800" style="border:1px solid #e3e7e8;border-radius:12px"
        title="Free TDEE calculator by No Nonsense Fitness" loading="lazy"></iframe>

What your readers get

Age, height, weight, activity level and sex in — maintenance, cut and lean-bulk calorie targets out, plus BMR and a protein/fat/carb macro breakdown. Same Mifflin-St Jeor formula and the same cut (−400 kcal) and lean-bulk (+250 kcal) offsets as our own TDEE calculator, so the numbers never disagree.

Live preview

The rules, such as they are

• Keep the “Powered by No Nonsense Fitness” credit link visible. That's the only payment, and it's part of the widget itself — it comes along automatically with the iframe, nothing to add on your end.
• Don't wrap it in ads or paywall the page it sits on.
• You don't need to ask permission or tell us — though if you email keith@nononsensefitness.ie we'll happily link back to you.

Is it safe to embed?

Yes. The widget is pure client-side JavaScript — all the maths runs in the visitor's browser. It makes no API calls, sets no cookies, and reads nothing from the page it's embedded on. Nothing about your site or your visitors is sent anywhere.

Want a different tool?

If a macro, body-fat or protein calculator would suit your readers better, say the word and we'll build an embed for it. We already have a free macro calculator embed too. The rest of the free tools are on the free tools page.