Embed our calculators on your website, for free
Blog, online shop, club or school website: add a useful calculator for your readers in seconds. They stay on your site, and the tool works exactly like on CalculaThor.
- 100% free, no sign-up or API key
- Works on desktop, tablet and mobile
- Light and fast, no ads in the widget
- Always up to date: improvements arrive automatically
How does it work?
- Pick a tool from the list below.
- Click "Copy code".
- Paste it into your page (HTML block on WordPress, Wix, Webflow, Shopify...).
Preview: the embedded calculator
Choose your tool
Everyday
- Online CalculatorSee the tool
- Bill splitterSee the tool
- Working days calculatorSee the tool
- Public holidaysSee the tool
- CountdownSee the tool
- Work Hours CalculatorSee the tool
- Due Date CalculatorSee the tool
- BMI CalculatorSee the tool
- Random DrawSee the tool
- Secret SantaSee the tool
Calculations
- Percentage CalculatorSee the tool
- Sales and Discounts CalculatorSee the tool
- Average CalculatorSee the tool
- Rule of threeSee the tool
- Unit converterSee the tool
- Evolution RateSee the tool
Money
- VAT CalculatorSee the tool
- Gross to Net Salary (France)See the tool
- Mortgage CalculatorSee the tool
- Compound interest calculatorSee the tool
- Euro/Dollar ConverterSee the tool
Dates & time
- Days Between Two DatesSee the tool
- Age CalculatorSee the tool
- Time DifferenceSee the tool
Text & web
- Password GeneratorSee the tool
- Word CounterSee the tool
- Duplicate RemoverSee the tool
- Text to URL ConverterSee the tool
- Email Signature GeneratorSee the tool
Images
- QR Code GeneratorSee the tool
- Image CompressionSee the tool
- WebP to JPG/PNG ConverterSee the tool
Marketing
- A/B TestSee the tool
- CPC CalculatorSee the tool
- CPA CalculatorSee the tool
- CPM CalculatorSee the tool
- Conversion RateSee the tool
- Average CartSee the tool
- ROAS Breakeven CalculatorSee the tool
- UTM URL GeneratorSee the tool
- 5-Star Review CalculatorSee the tool
Frequently asked questions
Is it really free?
Yes. The only thing we ask: keep the small link to CalculaThor under the tool, already included in the code.
Can I change the size?
Yes: edit the width and height in the code. With the small script included, the height adjusts to the content automatically.
Do my visitors leave my site?
No. The calculation happens right in your page, with no redirect.