A collection of 46 free, embeddable financial calculators for websites, blogs, and web applications. No API key, no signup, no cost — just copy-paste an iframe.
Built for personal finance bloggers, real estate sites, financial advisors, and educational platforms that want to add interactive calculation tools without building them from scratch.
Add any calculator to your site with a single iframe tag:
<iframe
src="https://www.calcmoney.co/embed/mortgage-calculator"
width="400"
height="560"
frameborder="0"
style="border: 1px solid #e5e7eb; border-radius: 12px; max-width: 100%;"
title="Mortgage Calculator"
loading="lazy"
></iframe>That's it. No JavaScript SDK, no build step, no dependencies.
- 46 calculators across loans, investment, retirement, salary, and business
- Mobile responsive — works on any screen size
- Dark mode support — automatically matches the host site's color scheme
- No ads, no tracking — clean, professional appearance
- GDPR compliant — all calculations run client-side, no data collected
- Fast loading — under 1 second load time, lazy-loading supported
- Always up to date — 2026 tax brackets, contribution limits, and rates
| Calculator | Embed URL | Description |
|---|---|---|
| Mortgage Calculator | /embed/mortgage-calculator |
Monthly payment with PMI, taxes, insurance |
| Loan Calculator | /embed/loan-calculator |
General-purpose loan payment calculator |
| Auto Loan Calculator | /embed/auto-loan-calculator |
Car financing with trade-in and sales tax |
| Auto Lease Calculator | /embed/auto-lease-calculator |
Monthly lease payment calculator |
| Amortization Calculator | /embed/amortization-calculator |
Full amortization schedule with extra payments |
| APR Calculator | /embed/apr-calculator |
True annual percentage rate |
| Credit Card Payoff | /embed/credit-card-payoff-calculator |
Payoff timeline and total interest |
| Debt Consolidation | /embed/debt-consolidation-calculator |
Compare consolidation savings |
| Debt Payoff Calculator | /embed/debt-payoff-calculator |
Avalanche vs snowball strategy |
| Down Payment Calculator | /embed/down-payment-calculator |
Savings plan for down payment |
| DTI Calculator | /embed/dti-calculator |
Debt-to-income ratio |
| EMI Calculator | /embed/emi-calculator |
Equated monthly installment |
| Extra Payment Calculator | /embed/extra-payment-calculator |
Impact of extra payments |
| FHA Loan Calculator | /embed/fha-loan-calculator |
FHA payment with MIP |
| HELOC Calculator | /embed/heloc-calculator |
Home equity line of credit |
| Home Affordability | /embed/home-affordability-calculator |
How much house you can afford |
| Loan Comparison | /embed/loan-comparison-calculator |
Compare multiple loan offers |
| Mortgage Payoff | /embed/mortgage-payoff-calculator |
Early payoff scenarios |
| Real Estate Calculator | /embed/real-estate-calculator |
Investment property analysis |
| Refinance Calculator | /embed/refinance-calculator |
Refinancing cost/benefit analysis |
| Rent Calculator | /embed/rent-calculator |
Rental affordability |
| Rent vs Buy | /embed/rent-vs-buy-calculator |
Renting vs buying comparison |
| Rental Property | /embed/rental-property-calculator |
Rental cash flow and ROI |
| Student Loan Calculator | /embed/student-loan-calculator |
Student loan repayment |
| VA Mortgage Calculator | /embed/va-mortgage-calculator |
VA loan payment (no down payment) |
| Calculator | Embed URL | Description |
|---|---|---|
| Compound Interest | /embed/compound-interest-calculator |
Growth with regular contributions |
| ROI Calculator | /embed/roi-calculator |
Return on investment and CAGR |
| Calculator | Embed URL | Description |
|---|---|---|
| Retirement Calculator | /embed/retirement-calculator |
Comprehensive retirement planning |
| 401(k) Calculator | /embed/401k-calculator |
401k growth with employer match |
| Roth IRA Calculator | /embed/roth-ira-calculator |
Tax-free Roth IRA growth |
| Traditional IRA | /embed/ira-calculator |
Traditional IRA with tax deferral |
| Annuity Calculator | /embed/annuity-calculator |
Annuity growth and future value |
| Annuity Payout | /embed/annuity-payout-calculator |
Monthly annuity payouts |
| Pension Calculator | /embed/pension-calculator |
Pension benefit estimation |
| Retirement Income | /embed/retirement-income-calculator |
Withdrawal planning |
| Social Security | /embed/social-security-calculator |
Benefit estimates by age |
| RMD Calculator | /embed/rmd-calculator |
Required minimum distributions |
| Calculator | Embed URL | Description |
|---|---|---|
| Income Tax Calculator | /embed/income-tax-calculator |
Federal and state income tax |
| Take-Home Pay | /embed/take-home-pay-calculator |
Net pay after all deductions |
| Hourly to Salary | /embed/hourly-to-salary-calculator |
Wage conversion |
| Salary Increment | /embed/salary-increment-calculator |
Raise impact over time |
| Overtime Calculator | /embed/overtime-calculator |
Overtime pay calculation |
| Raise vs Bonus | /embed/raise-vs-bonus-calculator |
Compare raise vs one-time bonus |
| Marriage Tax | /embed/marriage-tax-calculator |
Filing jointly vs separately |
| Estate Tax | /embed/estate-tax-calculator |
Federal estate tax estimate |
<!-- Small (sidebar-friendly) -->
<iframe src="https://www.calcmoney.co/embed/mortgage-calculator" width="350" height="520" ...></iframe>
<!-- Medium (default) -->
<iframe src="https://www.calcmoney.co/embed/mortgage-calculator" width="400" height="560" ...></iframe>
<!-- Large -->
<iframe src="https://www.calcmoney.co/embed/mortgage-calculator" width="450" height="600" ...></iframe>
<!-- Full width (responsive) -->
<iframe src="https://www.calcmoney.co/embed/mortgage-calculator" width="100%" height="580" ...></iframe>Add a "Custom HTML" block in the WordPress editor and paste the iframe code. No plugin required.
<!-- WordPress Custom HTML Block -->
<iframe
src="https://www.calcmoney.co/embed/mortgage-calculator"
width="100%"
height="580"
frameborder="0"
style="border: 1px solid #e5e7eb; border-radius: 12px; max-width: 100%;"
title="Mortgage Calculator - CalcMoney"
loading="lazy"
></iframe>
<p style="font-size: 12px; color: #9ca3af; margin-top: 8px;">
Calculator by <a href="https://www.calcmoney.co" target="_blank" rel="noopener">CalcMoney</a>
</p>function MortgageWidget() {
return (
<iframe
src="https://www.calcmoney.co/embed/mortgage-calculator"
width="100%"
height={580}
frameBorder="0"
style={{
border: '1px solid #e5e7eb',
borderRadius: '12px',
maxWidth: '100%',
}}
title="Mortgage Calculator"
loading="lazy"
/>
);
}<!-- Add directly to any HTML template or markdown file -->
<div style="max-width: 450px; margin: 0 auto;">
<iframe
src="https://www.calcmoney.co/embed/compound-interest-calculator"
width="100%"
height="580"
frameborder="0"
style="border: 1px solid #e5e7eb; border-radius: 12px;"
title="Compound Interest Calculator"
loading="lazy"
></iframe>
</div>Open demo.html in this repo to see all calculators in action locally, or visit the interactive embed builder to customize size and preview any calculator before embedding.
Personal Finance Blogs — Add a mortgage calculator next to your "how to buy a house" article. Your readers get an interactive tool, you get higher engagement and time-on-page.
Real Estate Websites — Embed the mortgage calculator, home affordability calculator, or rent vs buy calculator on property listing pages.
Financial Advisors — Add retirement, 401(k), and Roth IRA calculators to your client-facing website.
Educational Platforms — Teach financial literacy with interactive compound interest, budgeting, and loan calculators.
HR / Benefits Pages — Help employees understand their take-home pay, 401(k) match, or HSA contributions.
Is this really free? Yes. No API key, no signup, no usage limits, no cost. Ever.
Will the calculators have ads? No. The embedded calculators are completely ad-free.
Are the calculations accurate? Calculators use 2026 IRS tax brackets, contribution limits, FICA rates, and current financial formulas. They are updated annually.
Can I customize the appearance? The calculators automatically support dark mode. Size is customizable via iframe width/height attributes. Custom styling beyond that is not currently available.
Do you collect user data? No. All calculations run entirely in the browser. No data is sent to any server. No cookies, no tracking, no analytics on the embedded version.
What's the attribution requirement? A small "Calculator by CalcMoney" link is included at the bottom of each embed. We appreciate keeping it, but it is not strictly required.
- Full calculator list — Interactive embed builder with live preview
- All calculators — 76+ free financial calculators
- Blog — Personal finance guides and tips
The embed code snippets in this repository are provided under the MIT License. You are free to use, modify, and distribute the embed integration code.
The calculators themselves are hosted by CalcMoney and provided free of charge for embedding on any website.