Put a calculator on your site
10 of our calculators are available as embeddable widgets. Copy one snippet into your page and you get a working Sri Lankan calculator that we keep current — when a tax table or tariff changes, your embed updates with it and you do nothing.
Free for any site, commercial or otherwise. No signup, no API key, no account. All we ask is that you keep the attribution line that comes with the snippet.
It stays correct
The widget renders the same calculation as the tool page, from the same reviewed source data. A rate change reaches your readers the moment we ship it.
It fits your layout
The iframe is full-width and the optional resize script sizes it to its content, so there is no inner scrollbar and no dead space. It works without the script too.
It respects your readers
Calculations run in the reader's browser. We do not set advertising cookies in the widget and we never see the numbers they type.
It will not slow you down
The iframe is lazy-loaded, so it costs nothing until a reader scrolls to it, and it cannot block your own page from rendering.
How to use a snippet
- Pick a calculator below and copy its code.
- Paste it into your page where you want the widget to appear. In WordPress use a Custom HTML block, not the visual editor, which will strip the iframe.
- Publish. The widget is 620px tall by default and resizes itself to fit once the page loads.
Keep the attribution paragraph that follows the iframe. It is how your readers find the full tool, and it is the only condition attached to using these widgets.
GPA Calculator Sri Lanka - University GPA
Calculate semester and cumulative GPA with credits on a 4.0 scale.
<!-- GPA Calculator Sri Lanka - University GPA by HariTools -->
<iframe src="https://www.haritools.com/embed/gpa-calculator-sri-lanka"
title="GPA Calculator Sri Lanka - University GPA - HariTools"
width="100%" height="620" loading="lazy"
style="border:1px solid #e5e7eb;border-radius:12px;max-width:100%"
referrerpolicy="no-referrer-when-downgrade"></iframe>
<p style="font:14px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0">
<a href="https://www.haritools.com/calculator/gpa-calculator-sri-lanka">GPA Calculator</a>
by <a href="https://www.haritools.com/">HariTools</a>
</p>
<script src="https://www.haritools.com/embed.js" async></script>APIT Tax Calculator Sri Lanka 2025/2026
Estimate monthly APIT, employee EPF, and take-home salary.
<!-- APIT Tax Calculator Sri Lanka 2025/2026 by HariTools -->
<iframe src="https://www.haritools.com/embed/income-tax-calculator-sri-lanka"
title="APIT Tax Calculator Sri Lanka 2025/2026 - HariTools"
width="100%" height="620" loading="lazy"
style="border:1px solid #e5e7eb;border-radius:12px;max-width:100%"
referrerpolicy="no-referrer-when-downgrade"></iframe>
<p style="font:14px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0">
<a href="https://www.haritools.com/calculator/income-tax-calculator-sri-lanka">Income Tax (APIT) Calculator</a>
by <a href="https://www.haritools.com/">HariTools</a>
</p>
<script src="https://www.haritools.com/embed.js" async></script>Loan EMI Calculator Sri Lanka
Work out monthly instalments and total interest on a loan in LKR.
<!-- Loan EMI Calculator Sri Lanka by HariTools -->
<iframe src="https://www.haritools.com/embed/loan-emi-calculator-sri-lanka"
title="Loan EMI Calculator Sri Lanka - HariTools"
width="100%" height="620" loading="lazy"
style="border:1px solid #e5e7eb;border-radius:12px;max-width:100%"
referrerpolicy="no-referrer-when-downgrade"></iframe>
<p style="font:14px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0">
<a href="https://www.haritools.com/calculator/loan-emi-calculator-sri-lanka">Loan / EMI Calculator</a>
by <a href="https://www.haritools.com/">HariTools</a>
</p>
<script src="https://www.haritools.com/embed.js" async></script>VAT & SSCL Invoice Calculator
Calculate Sri Lankan VAT and SSCL cascading taxes.
<!-- VAT & SSCL Invoice Calculator by HariTools -->
<iframe src="https://www.haritools.com/embed/vat-sscl-invoice-calculator-sri-lanka"
title="VAT & SSCL Invoice Calculator - HariTools"
width="100%" height="620" loading="lazy"
style="border:1px solid #e5e7eb;border-radius:12px;max-width:100%"
referrerpolicy="no-referrer-when-downgrade"></iframe>
<p style="font:14px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0">
<a href="https://www.haritools.com/calculator/vat-sscl-invoice-calculator-sri-lanka">VAT & SSCL Invoice</a>
by <a href="https://www.haritools.com/">HariTools</a>
</p>
<script src="https://www.haritools.com/embed.js" async></script>CEB Electricity Bill Calculator (May 2026)
Calculate CEB/LECO bills with updated PUCSL block tariffs.
<!-- CEB Electricity Bill Calculator (May 2026) by HariTools -->
<iframe src="https://www.haritools.com/embed/ceb-leco-electricity-bill-calculator-sri-lanka"
title="CEB Electricity Bill Calculator (May 2026) - HariTools"
width="100%" height="620" loading="lazy"
style="border:1px solid #e5e7eb;border-radius:12px;max-width:100%"
referrerpolicy="no-referrer-when-downgrade"></iframe>
<p style="font:14px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0">
<a href="https://www.haritools.com/calculator/ceb-leco-electricity-bill-calculator-sri-lanka">Electricity Bill (PUCSL)</a>
by <a href="https://www.haritools.com/">HariTools</a>
</p>
<script src="https://www.haritools.com/embed.js" async></script>South Asian BMI & Ideal Weight Calculator
Check your Body Mass Index against WHO Asian thresholds.
<!-- South Asian BMI & Ideal Weight Calculator by HariTools -->
<iframe src="https://www.haritools.com/embed/asian-bmi-calculator-sri-lanka"
title="South Asian BMI & Ideal Weight Calculator - HariTools"
width="100%" height="620" loading="lazy"
style="border:1px solid #e5e7eb;border-radius:12px;max-width:100%"
referrerpolicy="no-referrer-when-downgrade"></iframe>
<p style="font:14px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0">
<a href="https://www.haritools.com/calculator/asian-bmi-calculator-sri-lanka">Asian BMI & Ideal Weight</a>
by <a href="https://www.haritools.com/">HariTools</a>
</p>
<script src="https://www.haritools.com/embed.js" async></script>EPF and ETF Calculator Sri Lanka
Estimate EPF and ETF contributions, returns, and a retirement balance.
<!-- EPF and ETF Calculator Sri Lanka by HariTools -->
<iframe src="https://www.haritools.com/embed/epf-etf-calculator-sri-lanka"
title="EPF and ETF Calculator Sri Lanka - HariTools"
width="100%" height="620" loading="lazy"
style="border:1px solid #e5e7eb;border-radius:12px;max-width:100%"
referrerpolicy="no-referrer-when-downgrade"></iframe>
<p style="font:14px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0">
<a href="https://www.haritools.com/calculator/epf-etf-calculator-sri-lanka">EPF & ETF Calculator</a>
by <a href="https://www.haritools.com/">HariTools</a>
</p>
<script src="https://www.haritools.com/embed.js" async></script>Fixed Deposit (FD) & T-Bill Calculator 2026
Calculate your Fixed Deposit or Treasury Bill returns, updated with the latest 10% Withholding Tax (WHT) regulations for Sri Lanka.
<!-- Fixed Deposit (FD) & T-Bill Calculator 2026 by HariTools -->
<iframe src="https://www.haritools.com/embed/fixed-deposit-calculator-sri-lanka"
title="Fixed Deposit (FD) & T-Bill Calculator 2026 - HariTools"
width="100%" height="620" loading="lazy"
style="border:1px solid #e5e7eb;border-radius:12px;max-width:100%"
referrerpolicy="no-referrer-when-downgrade"></iframe>
<p style="font:14px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0">
<a href="https://www.haritools.com/calculator/fixed-deposit-calculator-sri-lanka">FD & T-Bill Calculator</a>
by <a href="https://www.haritools.com/">HariTools</a>
</p>
<script src="https://www.haritools.com/embed.js" async></script>A/L Z-Score Calculator Sri Lanka
Calculate your A/L Z-score from your marks and the published subject mean and standard deviation.
<!-- A/L Z-Score Calculator Sri Lanka by HariTools -->
<iframe src="https://www.haritools.com/embed/al-z-score-calculator-sri-lanka"
title="A/L Z-Score Calculator Sri Lanka - HariTools"
width="100%" height="620" loading="lazy"
style="border:1px solid #e5e7eb;border-radius:12px;max-width:100%"
referrerpolicy="no-referrer-when-downgrade"></iframe>
<p style="font:14px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0">
<a href="https://www.haritools.com/calculator/al-z-score-calculator-sri-lanka">A/L Z-Score</a>
by <a href="https://www.haritools.com/">HariTools</a>
</p>
<script src="https://www.haritools.com/embed.js" async></script>Housing Loan Calculator Sri Lanka (with Stamp Duty)
Estimate a housing loan instalment plus the stamp duty and fees payable in cash on the day.
<!-- Housing Loan Calculator Sri Lanka (with Stamp Duty) by HariTools -->
<iframe src="https://www.haritools.com/embed/home-loan-calculator-sri-lanka"
title="Housing Loan Calculator Sri Lanka (with Stamp Duty) - HariTools"
width="100%" height="620" loading="lazy"
style="border:1px solid #e5e7eb;border-radius:12px;max-width:100%"
referrerpolicy="no-referrer-when-downgrade"></iframe>
<p style="font:14px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0">
<a href="https://www.haritools.com/calculator/home-loan-calculator-sri-lanka">Housing Loan Calculator</a>
by <a href="https://www.haritools.com/">HariTools</a>
</p>
<script src="https://www.haritools.com/embed.js" async></script>