Free Embeddable Calculator Widgets
Add powerful, fully-functional calculators to your website with a single line of code. No dependencies, no sign-up required.
Lightning Fast
Optimized for performance with minimal overhead and instant calculations.
Fully Responsive
Works perfectly on desktop, tablet, and mobile devices automatically.
Dark Mode Ready
Automatically adapts to your site's dark mode preferences.
Privacy Focused
All calculations happen locally. We don't track user input data.
How to Embed
1. Choose a calculator from our collection
2. Click the "Embed" button on the calculator page
3. Copy the embed code
4. Paste it into your website HTML
That's it! The calculator will appear on your page and work perfectly on all devices.
Example Embed Code
<iframe src="https://calccenter.io/embed/mortgage-calculator" width="100%" height="500" frameborder="0" style="border-radius: 8px; border: 1px solid #e5e7eb;"></iframe>Popular Calculators
Mortgage Payment Calculator
Calculate your monthly mortgage payment, total interest, and overall cost of a home loan based on price, down payment, interest rate, and loan term.
Compound Interest Calculator
Calculate how your investments grow over time with compound interest. See the power of compounding with regular monthly contributions and different compounding frequencies.
Loan Payoff Calculator
Find out how long it will take to pay off your loan and how much interest you will pay. Enter your balance, interest rate, and monthly payment to see your payoff timeline.
Ready to embed a calculator?
Browse our collection of 49+ free calculators and add them to your website today.
View All Calculators