For site owners & bloggers

Embed a free calculator — no signup, no cost

A real, working tool for your readers — not a screenshot or a link. Copy one line, paste it into your page, done. Six calculators are packaged as ready-to-embed widgets so far.

Why embed instead of linking?

A link sends your reader away. An embedded calculator lets them get their answer without leaving your page — which is a better experience for them and keeps them on your site longer. These are the same calculators that live on TidyCalcs, just sized to drop into a sidebar or inside a post.

They're free to use, there's no signup, no iframe ads, and they don't share any data with us beyond standard page analytics — every calculation happens entirely in the visitor's browser.

1. Mortgage Payment Calculator

Paste this wherever you want the calculator to appear:

<iframe src="https://www.tidycalcs.com/mortgage-calculator-widget/" width="100%" height="640" style="max-width:480px;border:none;" title="Mortgage Payment Calculator by TidyCalcs" loading="lazy"></iframe> <p style="max-width:480px;font-size:13px;text-align:center;margin:4px 0 0;">Free <a href="https://www.tidycalcs.com/mortgage-calculator/">mortgage calculator</a> by TidyCalcs</p>
Live preview

2. Debt Payoff Calculator

Same idea — paste this wherever you want it to appear:

<iframe src="https://www.tidycalcs.com/debt-payoff-calculator-widget/" width="100%" height="600" style="max-width:480px;border:none;" title="Debt Payoff Calculator by TidyCalcs" loading="lazy"></iframe> <p style="max-width:480px;font-size:13px;text-align:center;margin:4px 0 0;">Free <a href="https://www.tidycalcs.com/debt-payoff-calculator/">debt payoff calculator</a> by TidyCalcs</p>
Live preview

3. BMI Calculator

Works in US or metric units and shows the healthy weight range too:

<iframe src="https://www.tidycalcs.com/bmi-calculator-widget/" width="100%" height="560" style="max-width:480px;border:none;" title="BMI Calculator by TidyCalcs" loading="lazy"></iframe> <p style="max-width:480px;font-size:13px;text-align:center;margin:4px 0 0;">Free <a href="https://www.tidycalcs.com/bmi-calculator/">BMI calculator</a> by TidyCalcs</p>
Live preview

4. Daily Calorie Calculator

Gives daily calories for losing, keeping or gaining weight, plus a protein/carb/fat split:

<iframe src="https://www.tidycalcs.com/calorie-calculator-widget/" width="100%" height="780" style="max-width:480px;border:none;" title="Daily Calorie Calculator by TidyCalcs" loading="lazy"></iframe> <p style="max-width:480px;font-size:13px;text-align:center;margin:4px 0 0;">Free <a href="https://www.tidycalcs.com/calorie-calculator/">calorie calculator</a> by TidyCalcs</p>
Live preview

5. Currency Converter

Converts between 27 major currencies with rates updated daily:

<iframe src="https://www.tidycalcs.com/currency-converter-widget/" width="100%" height="600" style="max-width:480px;border:none;" title="Currency Converter by TidyCalcs" loading="lazy"></iframe> <p style="max-width:480px;font-size:13px;text-align:center;margin:4px 0 0;">Free <a href="https://www.tidycalcs.com/currency-converter/">currency converter</a> by TidyCalcs</p>
Live preview

6. Dog Age Calculator

Made for pet sitters, groomers, trainers, rescues and vet clinics. Converts dog years to human years by size, with a care tip for each life stage:

<iframe src="https://www.tidycalcs.com/dog-age-calculator-widget/" width="100%" height="640" style="max-width:480px;border:none;" title="Dog Age Calculator by TidyCalcs" loading="lazy"></iframe> <p style="max-width:480px;font-size:13px;text-align:center;margin:4px 0 0;">Free <a href="https://www.tidycalcs.com/dog-age-calculator/">dog age calculator</a> by TidyCalcs</p>
Live preview

The only ask

Each snippet ends with a one-line credit link under the calculator (for example, "Free mortgage calculator by TidyCalcs"). Please leave it in place — that's the only thing that makes this worth offering for free. Beyond that, style your page around it however you like; each widget's background is transparent and adapts to light or dark surroundings.

A few practical notes

Want a different calculator embedded?

Mortgage, debt payoff, BMI, calorie and currency are packaged as standalone widgets so far. If an auto loan, savings, or other TidyCalcs calculator would be useful on your site, let us know — happy to consider building one next.