Free to embed · no signup
Put any CalcCottage calculator on your site
Every calculator below can be dropped into your own page with one line of HTML. They are free to use, need no account or API key, and we do not capture leads from your visitors — there is no email gate and no data collection inside the embed.
Useful for real estate agents, mortgage brokers, housing counsellors, credit unions, personal finance bloggers, and anyone explaining a money decision to their readers.
The one condition
Keep the small “Free calculator by CalcCottage” credit that appears under each tool. That is the whole licence.
Please do not change that credit into keyword-stuffed anchor text. Plain brand attribution is what keeps this above board for both of us — search engines treat altered, keyword-heavy widget credits as manipulative, and we would rather the link stay honest than stuffed.
How to add one
- Pick a calculator below and click inside its code box — it selects the whole snippet.
- Copy it, then paste into your page wherever you want the calculator to appear. In WordPress use a Custom HTML block.
- Adjust
heightif your layout needs it. 1100px suits most calculators; the longer ones with charts may want more.
The embeds are responsive to width, so width="100%" is usually right.
All 23 embeddable calculators
Questions
Does it cost anything? No, and there is no paid tier. The calculators are free on our site and free on yours.
Will you email my visitors? No. The embeds have no form, no email capture, and no lead routing. Nothing is collected from the people using them.
Will the numbers go stale? We update the underlying assumptions when the rules change — the 2026 federal energy-credit expiry, for example, was applied across every affected calculator. Embeds pull live from our site, so your copy updates when ours does.
Something looks wrong. Tell us on the contact page and we will fix confirmed errors within five business days. See our editorial standards.