Embed our calculators on your website — free

Add any of these calculators to your own site, blog, or client's page with one line of code. They run entirely in the visitor's browser, auto-resize to fit, and never need a signup or API key. Free forever.

How to embed in 3 steps

1. Pick a widget below and click Copy embed code.
2. Paste it into your page's HTML where you want the calculator to appear.
3. That's it — the widget loads instantly and resizes itself. Works on WordPress, Wix, Webflow, Ghost, plain HTML and more.

Live stock price card for any NSE or BSE listed company. Open the full tool →

Live Stock Ticker

NSE & BSE stocks — updates every minute

Configure your widget

Try: TCS · INFY · HDFCBANK · WIPRO · TATAMOTORS

Live preview

Embed code

<iframe id="tot-stock-reliance" src="https://topopentools.com/embed/stock-ticker?symbol=RELIANCE&exchange=NSE" title="RELIANCE NSE Stock Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:480px;height:240px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="stock-ticker"){var f=document.getElementById("tot-stock-reliance");if(f)f.style.height=e.data.height+"px"}});</script>

Live Nifty 50, Sensex, Nifty Bank & Nifty IT — updates every minute. Open the full tool →

Market Indices Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-market-indices" src="https://topopentools.com/embed/market-indices" title="Market Indices Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:310px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="market-indices"){var f=document.getElementById("tot-market-indices");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Live gold & silver prices in INR — updates every minute. Open the full tool →

Gold & Silver Price Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-gold-silver-price" src="https://topopentools.com/embed/gold-silver-price" title="Gold & Silver Price Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:240px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="gold-silver-price"){var f=document.getElementById("tot-gold-silver-price");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Live exchange rates for 10 major currencies — updates every hour. Open the full tool →

Currency Converter Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-currency-converter" src="https://topopentools.com/embed/currency-converter" title="Currency Converter Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:220px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="currency-converter"){var f=document.getElementById("tot-currency-converter");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Enter any CTC to see monthly take-home under new or old tax regime. Open the full tool →

CTC to In-Hand Salary Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-ctc-salary-calculator" src="https://topopentools.com/embed/ctc-salary-calculator" title="CTC to In-Hand Salary Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:240px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="ctc-salary-calculator"){var f=document.getElementById("tot-ctc-salary-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Loan EMI with full amortization schedule. Open the full tool →

EMI Calculator

Live preview

Paste this where you want it on your site

<iframe id="tot-emi-calculator" src="https://topopentools.com/embed/emi-calculator" title="EMI Calculator by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:760px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="emi-calculator"){var f=document.getElementById("tot-emi-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Project mutual-fund SIP growth over time. Open the full tool →

SIP Calculator

Live preview

Paste this where you want it on your site

<iframe id="tot-sip-calculator" src="https://topopentools.com/embed/sip-calculator" title="SIP Calculator by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:640px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="sip-calculator"){var f=document.getElementById("tot-sip-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Monthly mortgage with taxes & insurance. Open the full tool →

Mortgage Calculator

Live preview

Paste this where you want it on your site

<iframe id="tot-mortgage-calculator" src="https://topopentools.com/embed/mortgage-calculator" title="Mortgage Calculator by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:780px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="mortgage-calculator"){var f=document.getElementById("tot-mortgage-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Compare trading charges across 5 Indian brokers. Open the full tool →

Brokerage Calculator

Live preview

Paste this where you want it on your site

<iframe id="tot-brokerage-calculator" src="https://topopentools.com/embed/brokerage-calculator" title="Brokerage Calculator by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:840px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="brokerage-calculator"){var f=document.getElementById("tot-brokerage-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Body Mass Index with healthy-range category. Open the full tool →

BMI Calculator

Live preview

Paste this where you want it on your site

<iframe id="tot-bmi-calculator" src="https://topopentools.com/embed/bmi-calculator" title="BMI Calculator by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:560px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="bmi-calculator"){var f=document.getElementById("tot-bmi-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Percent of a number, change, and ratios. Open the full tool →

Percentage Calculator

Live preview

Paste this where you want it on your site

<iframe id="tot-percentage-calculator" src="https://topopentools.com/embed/percentage-calculator" title="Percentage Calculator by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:480px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="percentage-calculator"){var f=document.getElementById("tot-percentage-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Shows CGST+SGST and IGST simultaneously — add or remove GST, all 5 rates. Open the full tool →

GST Calculator Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-gst-calculator" src="https://topopentools.com/embed/gst-calculator" title="GST Calculator Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:440px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="gst-calculator"){var f=document.getElementById("tot-gst-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Fixed deposit with SBI/HDFC/Axis presets, senior citizen toggle, and effective APY. Open the full tool →

FD Calculator Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-fd-calculator" src="https://topopentools.com/embed/fd-calculator" title="FD Calculator Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:420px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="fd-calculator"){var f=document.getElementById("tot-fd-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Find CAGR or future value with benchmark comparison (FD, Gold, Nifty) and Rule of 72. Open the full tool →

CAGR Calculator Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-cagr-calculator" src="https://topopentools.com/embed/cagr-calculator" title="CAGR Calculator Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:460px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="cagr-calculator"){var f=document.getElementById("tot-cagr-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Compound interest with monthly SIP, compounding frequency, and vs simple interest comparison. Open the full tool →

Compound Interest Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-compound-interest" src="https://topopentools.com/embed/compound-interest" title="Compound Interest Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:500px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="compound-interest"){var f=document.getElementById("tot-compound-interest");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Side-by-side new vs old regime comparison for FY 2025-26 with auto 80C and standard deduction. Open the full tool →

Income Tax India Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-income-tax-india" src="https://topopentools.com/embed/income-tax-india" title="Income Tax India Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:380px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="income-tax-india"){var f=document.getElementById("tot-income-tax-india");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

PPF maturity with wealth gain % and comparison against equivalent FD returns. Open the full tool →

PPF Calculator Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-ppf-calculator" src="https://topopentools.com/embed/ppf-calculator" title="PPF Calculator Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:420px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="ppf-calculator"){var f=document.getElementById("tot-ppf-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Gratuity payout under Payment of Gratuity Act — supports both covered and non-covered employees. Open the full tool →

Gratuity Calculator Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-gratuity-calculator" src="https://topopentools.com/embed/gratuity-calculator" title="Gratuity Calculator Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:400px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="gratuity-calculator"){var f=document.getElementById("tot-gratuity-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

SI with years/months/days input, quarterly growth tracker, and vs compound interest comparison. Open the full tool →

Simple Interest Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-simple-interest" src="https://topopentools.com/embed/simple-interest" title="Simple Interest Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:460px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="simple-interest"){var f=document.getElementById("tot-simple-interest");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Profit/loss, return, annualized return and breakeven price for any stock trade — $/₹/€/£. Open the full tool →

Stock Profit Calculator Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-stock-profit" src="https://topopentools.com/embed/stock-profit" title="Stock Profit Calculator Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:440px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="stock-profit"){var f=document.getElementById("tot-stock-profit");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Crypto P&L with buy/sell fees, ROI and the breakeven sell price — currency-selectable. Open the full tool →

Crypto Profit Calculator Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-crypto-profit" src="https://topopentools.com/embed/crypto-profit" title="Crypto Profit Calculator Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:440px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="crypto-profit"){var f=document.getElementById("tot-crypto-profit");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Intrinsic value per share, margin of safety, and a growth×WACC sensitivity grid. Open the full tool →

DCF Valuation Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-dcf-calculator" src="https://topopentools.com/embed/dcf-calculator" title="DCF Valuation Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:520px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="dcf-calculator"){var f=document.getElementById("tot-dcf-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Projected balance vs inflated college cost, plus the monthly saving needed to fully fund it. Open the full tool →

529 College Savings Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-529-calculator" src="https://topopentools.com/embed/529-calculator" title="529 College Savings Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:470px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="529-calculator"){var f=document.getElementById("tot-529-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Current yield, approx YTM, and premium/discount with capital gain to maturity. Open the full tool →

Bond Yield Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-bond-yield" src="https://topopentools.com/embed/bond-yield" title="Bond Yield Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:430px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="bond-yield"){var f=document.getElementById("tot-bond-yield");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Shows the money lost to fund fees over time — and what % of your gains they eat. Open the full tool →

Expense Ratio Impact Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-expense-ratio" src="https://topopentools.com/embed/expense-ratio" title="Expense Ratio Impact Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:420px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="expense-ratio"){var f=document.getElementById("tot-expense-ratio");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Available home-equity credit line from your home value, LTV limit and mortgage balance. Open the full tool →

HELOC Calculator Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-heloc" src="https://topopentools.com/embed/heloc" title="HELOC Calculator Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:440px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="heloc"){var f=document.getElementById("tot-heloc");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Payoff time, total interest, and how much an extra payment saves you. Open the full tool →

Student Loan Payoff Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-student-loan-payoff" src="https://topopentools.com/embed/student-loan-payoff" title="Student Loan Payoff Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:430px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="student-loan-payoff"){var f=document.getElementById("tot-student-loan-payoff");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

ELSS maturity, wealth gained, 80C tax saved, and the net cost after the tax rebate. Open the full tool →

ELSS (80C) Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-elss" src="https://topopentools.com/embed/elss" title="ELSS (80C) Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:420px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="elss"){var f=document.getElementById("tot-elss");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Present value of your future income — a benchmark for how much life cover you need. Open the full tool →

Human Life Value Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-human-life-value" src="https://topopentools.com/embed/human-life-value" title="Human Life Value Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:400px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="human-life-value"){var f=document.getElementById("tot-human-life-value");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

How much home you can afford on the 28/36 rule, with max loan and monthly budget. Open the full tool →

House Affordability Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-house-affordability" src="https://topopentools.com/embed/house-affordability" title="House Affordability Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:460px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="house-affordability"){var f=document.getElementById("tot-house-affordability");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Project recurring-investment growth — final value, invested, gains, and money multiple. Open the full tool →

Dollar-Cost Averaging Widget

Live preview

Paste this where you want it on your site

<iframe id="tot-dollar-cost-averaging" src="https://topopentools.com/embed/dollar-cost-averaging" title="Dollar-Cost Averaging Widget by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:400px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="dollar-cost-averaging"){var f=document.getElementById("tot-dollar-cost-averaging");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Terms of use

These widgets are free for personal and commercial websites. Please keep the “Powered by TopOpenTools” link intact. The calculators are for general information only and are not financial, tax, or medical advice. Want a tool added to this list? Let us know.