Live demo

SimpleCalcKit

Thirteen embeddable calculators for any country and language, that bring you leads.

Join the waitlist

Try it: pick a calculator and change the numbers

Calculator
Theme

Demo for illustration. Results are estimates, not medical, financial or tax advice, and nothing you type here is saved or sent. Hindi and Spanish text should be reviewed by a native speaker before you rely on it.

Visitors love calculators, and they stay longer on pages that have one. SimpleCalcKit gives you thirteen ready-made calculators in one small web component that works on any website, in many countries, with your colours, your heading and a button that turns an answer into an enquiry.

The calculators

  • Health: BMI with WHO or Asian cut-offs, and daily calories (maintenance, slow loss, slow gain).
  • Money: loan EMI, SIP growth, compound interest, GST or VAT (add or remove), discount, profit margin and markup, ROI, and break-even.
  • Everyday: percentage (three kinds of question), unit converter (length, weight, volume, temperature) and age.

More calculators can be added on request, for example EMI with part-payment, body fat, FD and RD, mortgage, or income tax.

Built for more than one country

Pick a country and the calculator uses that country's number format and currency, and switches between metric and imperial units. Fourteen countries are set up, including India, the United States, the United Kingdom, Canada, Australia, the UAE, Germany, France, Spain, Brazil and Mexico. Any currency symbol or code works, and the interface comes in English, Hindi and Spanish, with more languages possible.

Turn answers into enquiries, without storing anything

After the result, the calculator can show a button. With a WhatsApp number, it opens WhatsApp with the visitor's result already typed in, so they only press send. With an email address, it opens their mail app with the result in the message. With a link, it opens your quote or contact page. The calculator also fires a browser event, so your developer can send the result to analytics or your own form.

Everything is calculated in the visitor's browser. SimpleCalcKit does not store, collect or send any data. The button only does something when the visitor taps it.

Try it, then get a licence

The live demo above runs only on simpleapp.in, so you can try every calculator, country and language. Licences for your own website are launching soon, with a one-off price and a file made for your domain. Join the waitlist below and we will email you first. It works in React, Next.js, Vue, Angular, Svelte, WordPress and plain HTML, because it is a standard web component.

Honest by design

Each calculator shows a short note under the result. Health results are estimates and not medical advice. Investment and loan results are illustrations and not guaranteed returns or lender offers. You should still check formulas and rates that matter to your business.

Features

  • Thirteen calculators in one small component, from BMI and loan EMI to margin, ROI and unit conversion
  • 14 countries with local number formats, currencies and metric or imperial units
  • English, Hindi and Spanish built in
  • WhatsApp, email or link button that turns a result into an enquiry
  • No data stored, collected or sent by the calculator
  • Light, dark and auto themes, plus your brand colour
  • Accessible forms with live results for screen readers
  • Small and fast: about 17 KB compressed, no dependencies, no cookies
  • Browser event for your own analytics or lead form

Works with

  • WordPress
  • WooCommerce
  • React
  • Next.js
  • Vue
  • Angular
  • Svelte
  • Drupal
  • Plain HTML

FAQ

Questions

Does it collect my visitors' data?

No. The calculator works in the visitor's browser and does not store, collect or send anything. The WhatsApp or link button only opens when the visitor taps it, and the result is put into the message for them to send themselves.

Are the results accurate?

They use standard formulas: BMI from weight and height, Mifflin-St Jeor for calories, the reducing-balance formula for EMI and the compound-growth formula for SIP and compound interest. They are estimates and illustrations, and each calculator says so. They are not medical, tax or investment advice.

Can I change the look and the wording?

Yes. You can set the theme, brand colour, heading, country, language, currency and button text. Extra styling is possible through CSS variables.

Will it work on my WordPress site?

Yes, paste it into an HTML block. A WordPress plugin with a shortcode and a block is planned, so you can add it without touching code.

Can you add a calculator I need?

Often yes. Tell us what your visitors ask for, such as EMI with part-payment, FD or RD, body fat or an income tax estimate, and we will give you an estimate.

How much will it cost?

Pricing is not final. Join the waitlist and we will email you first, before launch.

Be first

Join the SimpleCalcKit waitlist

Leave your details and tell us how you would use it. We will email you when it is ready, and early users get a say in what we build first.

  • No spam, one email when it is ready
  • Early users shape the roadmap

Looking for something built just for you? Ask about custom software.