Embed our calculators on your site — free
Drop one line of HTML to get a live calculator on your blog post, landing page or wiki. No sign-up, no ads, no tracking, no fees.
Replace YOURSITE with your domain in the snippet — that's it. We use that to count which embedded sites send traffic; never to track end-users.
- Same calculation engine as our public calculator pages
- Mobile-responsive — adapts to your column width
- Light footer line: Powered by SimpleCalc.co (one small link, no banner)
- Free forever — no breaking changes to the embed URLs once published
- Send a message via our contact form if you want a custom calculator built
Mortgage Calculator
Estimate monthly mortgage payments — UK or US, fixed term.
<iframe src="https://simplecalc.co/embed/mortgage?utm_source=YOURSITE" width="100%" height="600" style="border:0;border-radius:8px;" loading="lazy" title="SimpleCalc mortgage widget"></iframe>Compound Interest Calculator
Project the future value of savings or investments with compounding.
<iframe src="https://simplecalc.co/embed/compound-interest?utm_source=YOURSITE" width="100%" height="600" style="border:0;border-radius:8px;" loading="lazy" title="SimpleCalc compound-interest widget"></iframe>UK Salary Calculator
Calculate take-home pay after UK income tax and National Insurance.
<iframe src="https://simplecalc.co/embed/salary-uk?utm_source=YOURSITE" width="100%" height="600" style="border:0;border-radius:8px;" loading="lazy" title="SimpleCalc salary-uk widget"></iframe>US Salary Calculator
Calculate take-home pay after US federal and state taxes.
<iframe src="https://simplecalc.co/embed/salary-us?utm_source=YOURSITE" width="100%" height="600" style="border:0;border-radius:8px;" loading="lazy" title="SimpleCalc salary-us widget"></iframe>BMI Calculator
Calculate Body Mass Index in metric or imperial units.
<iframe src="https://simplecalc.co/embed/bmi?utm_source=YOURSITE" width="100%" height="600" style="border:0;border-radius:8px;" loading="lazy" title="SimpleCalc bmi widget"></iframe>Loan Calculator
Calculate monthly loan payments with interest amortisation.
<iframe src="https://simplecalc.co/embed/loan?utm_source=YOURSITE" width="100%" height="600" style="border:0;border-radius:8px;" loading="lazy" title="SimpleCalc loan widget"></iframe>Investment Calculator
Project investment growth with regular contributions.
<iframe src="https://simplecalc.co/embed/investment?utm_source=YOURSITE" width="100%" height="600" style="border:0;border-radius:8px;" loading="lazy" title="SimpleCalc investment widget"></iframe>Retirement Planner
Estimate retirement savings needs and projected pot.
<iframe src="https://simplecalc.co/embed/retirement?utm_source=YOURSITE" width="100%" height="600" style="border:0;border-radius:8px;" loading="lazy" title="SimpleCalc retirement widget"></iframe>House Affordability Calculator
Calculate maximum mortgage based on income and deposit.
<iframe src="https://simplecalc.co/embed/house-affordability?utm_source=YOURSITE" width="100%" height="600" style="border:0;border-radius:8px;" loading="lazy" title="SimpleCalc house-affordability widget"></iframe>VAT Calculator
Add or remove UK VAT (20%) from any amount.
<iframe src="https://simplecalc.co/embed/vat?utm_source=YOURSITE" width="100%" height="600" style="border:0;border-radius:8px;" loading="lazy" title="SimpleCalc vat widget"></iframe>Percentage Calculator
Calculate percentages, percentage increase/decrease, and more.
<iframe src="https://simplecalc.co/embed/percentage?utm_source=YOURSITE" width="100%" height="600" style="border:0;border-radius:8px;" loading="lazy" title="SimpleCalc percentage widget"></iframe>Currency Converter
Convert between major world currencies with live rates.
<iframe src="https://simplecalc.co/embed/currency?utm_source=YOURSITE" width="100%" height="600" style="border:0;border-radius:8px;" loading="lazy" title="SimpleCalc currency widget"></iframe>