Free calculators for your website
Bloggers, real-estate agents, credit unions and HR teams can embed any Numlight calculator for free. It resizes itself, works on phones, follows light or dark mode, and stays up to date with current tax rules — you never have to maintain it.
How to add one
- Pick a calculator below and copy its two lines.
- Paste them into your page's HTML where the calculator should appear.
- Optional: add
data-theme="light"or"dark"to force a theme.
Free to use with the "by Numlight" link left in place. Calculations run in the visitor's browser; we don't collect their inputs.
Home & mortgage
<div data-numlight="mortgage-payment"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="home-affordability"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="mortgage-payoff"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="refinance"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="va-loan"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="fha-loan"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="conventional-loan"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="fha-vs-conventional"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="usda-loan"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="price-from-payment"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="debt-to-income"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="rent-vs-buy"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="amortization"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="heloc"></div>
<script src="https://numlight.com/embed.js" async></script>Paycheck & tax
<div data-numlight="paycheck"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="salary-after-tax"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="job-offer"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="federal-income-tax"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="tax-law-changes"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="tips-overtime-deduction"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="state-move"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="self-employment-tax"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="salary-converter"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="aca-subsidy"></div>
<script src="https://numlight.com/embed.js" async></script>Debt & loans
<div data-numlight="credit-card-payoff"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="debt-payoff"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="student-loan"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="personal-loan"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="auto-loan"></div>
<script src="https://numlight.com/embed.js" async></script>Saving & retirement
<div data-numlight="compound-interest"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="401k"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="roth-ira"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="roth-vs-traditional"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="hsa"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="social-security"></div>
<script src="https://numlight.com/embed.js" async></script><div data-numlight="inflation"></div>
<script src="https://numlight.com/embed.js" async></script>