Your customers type things like "how much does a plumber cost" into Google every day. A little calculator on your site answers that question, and gets you found on Google. Here's how to add one in 10 minutes. No tech skills needed.
It's a little interactive tool on your website. The customer types in a few things (the size of their job, their budget, their zip code) and it gives them an answer. A price estimate, a quote, a timeline, or a comparison.
Think of a tradie site with an "emergency callout cost calculator," a mortgage broker with a "repayments calculator," a gym with a "personal training cost calculator." Simple. Useful. Takes 2 minutes to use.
Scroll down and pick whichever feels easiest.
Type your niche below. We'll write a prompt you copy-paste into ChatGPT (or Claude). The AI builds you a complete working calculator (code, styling, everything) that you drop onto your website.
Already use Claude (claude.ai or Claude Desktop)? Download our pre-built "Calculator Page Builder" skill. Drop it into a Claude Project, tell it your niche, and Claude walks you through the whole build. No prompt writing needed. Free. Works with any paid Claude account.
Download the Claude skill โSkip the copy-paste. Add your Anthropic API key and this tool builds the calculator for you. It generates the file, lets you preview it, and downloads it ready to upload. Your key never leaves your browser. Costs ~$0.05 to $0.15 per build on your own account.
What's an API key? Think of it as a personal access code for Claude's "engine." It lets this tool generate code on your behalf using your own Anthropic account โ different from the chatgpt.com / claude.ai chat interface.
How to get one (5 min):
sk-ant-) and paste below.Don't want to mess with API keys? Use the free downloadable Claude skill instead โ paste it into a Claude Project and run there.
Don't want to deal with API keys?
Download the free Claude skill instead โSame result โ paste into a Claude Project and run there. No API key needed.
Tell us about your niche and we'll suggest 5 calculator ideas tailored to your industry.
Click Build this next to the one you want โ Claude will generate a complete calculator page (HTML + CSS + JS in one file) ready to upload.
| Calculator | What it does | Why it works |
|---|
Preview below. Use the buttons to download the HTML file or copy the code.
Want to build calculators inside Claude without an API key?
Download the Free Claude Skill