Free for Everyone

Embeddable Fitness Calculators

Add professional fitness calculators to your website, blog, or app. Free, responsive, and always up-to-date.

How to Use

Choose a calculator from the list below
Copy the embed code
Paste it into your website's HTML
The calculator will appear and work immediately

Available Calculators

One Rep Max Calculator

Calculate estimated 1RM from any weight and rep combination

Open in new tab

Embed Code

<iframe
  src="https://arvo.guru/embed/1rm-calculator"
  width="100%"
  height="600"
  frameborder="0"
  style="border: 1px solid #e5e7eb; border-radius: 12px;"
  title="One Rep Max Calculator"
></iframe>
<p style="text-align: center; font-size: 12px; color: #6b7280; margin-top: 8px;">
  Powered by <a href="https://arvo.guru" target="_blank" rel="noopener" style="color: #3b82f6;">Arvo</a>
</p>

TDEE Calculator

Calculate Total Daily Energy Expenditure based on activity level

Open in new tab

Embed Code

<iframe
  src="https://arvo.guru/embed/tdee-calculator"
  width="100%"
  height="700"
  frameborder="0"
  style="border: 1px solid #e5e7eb; border-radius: 12px;"
  title="TDEE Calculator"
></iframe>
<p style="text-align: center; font-size: 12px; color: #6b7280; margin-top: 8px;">
  Powered by <a href="https://arvo.guru" target="_blank" rel="noopener" style="color: #3b82f6;">Arvo</a>
</p>

Macro Calculator

Calculate optimal macronutrient ratios for your goals

Open in new tab

Embed Code

<iframe
  src="https://arvo.guru/embed/macro-calculator"
  width="100%"
  height="700"
  frameborder="0"
  style="border: 1px solid #e5e7eb; border-radius: 12px;"
  title="Macro Calculator"
></iframe>
<p style="text-align: center; font-size: 12px; color: #6b7280; margin-top: 8px;">
  Powered by <a href="https://arvo.guru" target="_blank" rel="noopener" style="color: #3b82f6;">Arvo</a>
</p>

Plate Calculator

Calculate which plates to load on a barbell

Open in new tab

Embed Code

<iframe
  src="https://arvo.guru/embed/plate-calculator"
  width="100%"
  height="500"
  frameborder="0"
  style="border: 1px solid #e5e7eb; border-radius: 12px;"
  title="Plate Calculator"
></iframe>
<p style="text-align: center; font-size: 12px; color: #6b7280; margin-top: 8px;">
  Powered by <a href="https://arvo.guru" target="_blank" rel="noopener" style="color: #3b82f6;">Arvo</a>
</p>

Calorie Deficit Calculator

Calculate safe calorie deficit for weight loss

Open in new tab

Embed Code

<iframe
  src="https://arvo.guru/embed/calorie-deficit-calculator"
  width="100%"
  height="650"
  frameborder="0"
  style="border: 1px solid #e5e7eb; border-radius: 12px;"
  title="Calorie Deficit Calculator"
></iframe>
<p style="text-align: center; font-size: 12px; color: #6b7280; margin-top: 8px;">
  Powered by <a href="https://arvo.guru" target="_blank" rel="noopener" style="color: #3b82f6;">Arvo</a>
</p>

RPE/RIR Calculator

Convert between RPE and RIR for training intensity

Open in new tab

Embed Code

<iframe
  src="https://arvo.guru/embed/rpe-calculator"
  width="100%"
  height="550"
  frameborder="0"
  style="border: 1px solid #e5e7eb; border-radius: 12px;"
  title="RPE/RIR Calculator"
></iframe>
<p style="text-align: center; font-size: 12px; color: #6b7280; margin-top: 8px;">
  Powered by <a href="https://arvo.guru" target="_blank" rel="noopener" style="color: #3b82f6;">Arvo</a>
</p>

Body Composition Calculator

Estimate body fat percentage and lean mass

Open in new tab

Embed Code

<iframe
  src="https://arvo.guru/embed/body-composition-calculator"
  width="100%"
  height="700"
  frameborder="0"
  style="border: 1px solid #e5e7eb; border-radius: 12px;"
  title="Body Composition Calculator"
></iframe>
<p style="text-align: center; font-size: 12px; color: #6b7280; margin-top: 8px;">
  Powered by <a href="https://arvo.guru" target="_blank" rel="noopener" style="color: #3b82f6;">Arvo</a>
</p>

Volume Calculator

Calculate weekly training volume per muscle group

Open in new tab

Embed Code

<iframe
  src="https://arvo.guru/embed/volume-calculator"
  width="100%"
  height="650"
  frameborder="0"
  style="border: 1px solid #e5e7eb; border-radius: 12px;"
  title="Volume Calculator"
></iframe>
<p style="text-align: center; font-size: 12px; color: #6b7280; margin-top: 8px;">
  Powered by <a href="https://arvo.guru" target="_blank" rel="noopener" style="color: #3b82f6;">Arvo</a>
</p>

Frequently Asked Questions

Are these widgets free to use?

Yes! All our calculator widgets are completely free to embed on your website, blog, or app. We only ask that you keep the 'Powered by Arvo' link visible.

How do I embed a calculator on my website?

Simply copy the embed code for the calculator you want, then paste it into your website's HTML where you want the calculator to appear. The widget will automatically resize to fit your container width.

Can I customize the widget appearance?

The widgets automatically adapt to light and dark themes. The height is customizable via the iframe height attribute. For custom styling needs, contact us.

Do the widgets work on mobile devices?

Yes, all widgets are fully responsive and work great on mobile devices, tablets, and desktops.

Is there a limit to how many widgets I can embed?

No limits! Embed as many calculators as you need on your website.

Want More Fitness Tools?

Arvo offers AI-powered workout coaching with set-by-set progression, personalized programming, and more.

Try Arvo Free