Publisher tools

Free embeddable calculator widgets

Add a working calculator to an article, resource page, course, or company website without maintaining calculation code. Choose a widget below, set a practical height, test the live preview, and paste the generated HTML into your site.

Configure widget

CalculatorWidget height

Use 480–1,200 px. Longer calculators need more height to avoid an inner scrollbar.

Show Calxo AI creditOptional, visible, and marked nofollow. We never add hidden or keyword-rich links.Embed code

<div class="calxo-calculator-widget" style="width:100%;max-width:960px;">
  <iframe title="BMI Calculator by Calxo AI" src="https://www.calxo.ai/embed/bmi-calculator" width="100%" height="860" loading="lazy" allow="clipboard-write" referrerpolicy="strict-origin-when-cross-origin" style="display:block;width:100%;max-width:100%;border:1px solid #e2e8f0;border-radius:12px;overflow:hidden;background:#fff;"></iframe>
  <p style="margin:8px 0 0;text-align:right;font:12px/1.5 system-ui,sans-serif;color:#64748b;">Free calculator by <a href="https://www.calxo.ai/bmi-calculator" target="_blank" rel="nofollow noopener" style="color:#2563eb;font-weight:700;">Calxo AI</a></p>
</div>

Live preview

BMI Calculator

Open full calculator

Calculate adult BMI, weight category, healthy-weight range, and an estimated body-fat percentage.

Responsive by default

The iframe fills the width of its container and works in narrow mobile layouts. Its height is intentionally configurable because a mortgage calculator and a percentage calculator do not need the same vertical space.

Privacy-conscious loading

Widgets load lazily and calculations run in the browser whenever possible. Publishers should still mention third-party embeds in their own privacy policy and review the widget before publishing.

Honest attribution

Calxo credit is visible, optional, and uses a branded nofollow link. There are no hidden links or keyword-stuffed anchors. If your editorial team independently recommends the calculator, it may cite the full calculator page in the normal way.

Embedding checklist

1. Preview the calculator with realistic inputs and choose enough height to avoid nested scrolling.
2. Paste the complete snippet into an HTML block; do not place it inside another link or interactive element.
3. Keep the iframe title so screen-reader users know which calculator is embedded.
4. Explain important assumptions near the widget and link to the full calculator methodology when the result affects financial or health decisions.

Need a calculator that is not in the featured list? Open any supported calculator page and use its embed button, or contact us through the feedback control on that page.