Real formula tracing
We build a dependency graph from your actual formulas rather than guessing at layout, so multi-step calculations survive the move intact. This is the part that makes everything else possible.
=IF(B12>threshold, B12*C12, 0) Turn your Excel calculator into a live web calculator
Upload an .xlsx file and get a working, embeddable web calculator in
minutes. We trace your real formulas, so the logic you already trust comes with it.
No rebuilding, no developer, no code.
- Free credits on approval
- No credit card
- Download & self-host
How it works
From spreadsheet to live calculator in three steps
No rebuild, no re-implementing formulas by hand, no developer time.
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Upload your spreadsheet
Drop in any .xlsx calculator. We trace every formula into a dependency graph and work out which cells are inputs, which are results, and which are working.
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Confirm the fields
Review what we detected and correct anything we got wrong: mark fields as editable, result, or hidden. You stay in control of the final structure.
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Generate & publish
Point us at your website and we match its colours and typography. Download standalone HTML and embed it anywhere, no runtime, no dependency on us.
Why it works
Built for spreadsheets that actually calculate something
Most converters screenshot your layout. We read the formulas underneath it.
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Matches your brand
Give us your site URL and we extract its colours and typography, so the calculator looks like it belongs there instead of bolted on.
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Edit by describing
Click any field, say what you want changed, and let the AI patch it. No hunting through generated markup.
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Charts included
Workbooks with charts get interactive Chart.js equivalents that update live as inputs change.
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Standalone output
One self-contained HTML file. Host it anywhere, embed it in any CMS, and keep it working even if you stop paying us.
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Responsive by default
Every calculator is built mobile-first and previewed across desktop, tablet and phone before you ship it.
Pricing
Pay per calculator, not per month
One credit builds one calculator. Credits never expire, and everything you generate is yours to download and host.
Indicative pricing. Final prices are set after beta. The figures
below are placeholders and are not an offer. Beta members lock in early-bird rates.
Starter
For a one-off calculator or a first client project.
€29 indicative
10 credits · €2.90 per calculator
Request beta access
- 10 calculator generations
- AI-generated, standalone HTML
- Match your site’s design
- Unlimited edits via AI patching
- Download & self-host, no lock-in
Pro
RecommendedFor agencies and consultants shipping calculators regularly.
€99 indicative
50 credits · €1.98 per calculator
Request beta access
- 50 calculator generations
- Everything in Starter
- Charts & multi-sheet workbooks
- Side-by-side and single-column layouts
- Priority beta support
Agency
For teams converting a whole library of spreadsheets.
€299 indicative
200 credits · €1.50 per calculator
Request beta access
- 200 calculator generations
- Everything in Pro
- Complex & simulation workbooks
- Hands-on migration help
- Direct line to the founder
Pricing is finalised after beta. Beta members lock in early-bird rates.
FAQ
Questions, answered
What kinds of Excel files work best?
Calculators driven by formulas: pricing tools, ROI and mortgage models, quoting sheets, dosage and engineering calculators. If a person changes a few inputs and reads a result, it will convert well. Very large data-heavy workbooks still work, but the lookup tables get embedded rather than shown.
Do I need to know how to code?
No. You upload a spreadsheet, confirm which fields are inputs and which are results, and download the finished calculator. Everything in between is handled for you.
What do I actually get at the end?
A single standalone HTML file containing your calculator, its styling and its logic. Host it yourself, embed it in WordPress, Webflow or any CMS. It keeps working whether or not you stay a customer.
Are my spreadsheets kept private?
Your files are processed to build your calculator and stored against your project so you can regenerate it later. They are never shared with other users and never sold.
How accurate are the converted formulas?
We trace the real dependency graph rather than re-implementing formulas by hand, so arithmetic, lookups and conditional logic carry over faithfully. You review every detected field before generating, and you can correct anything that looks wrong.
How does beta access work?
Register an account and request beta access. Requests are reviewed manually, and approved accounts receive free credits to try the product. Pricing is finalised after beta, and beta members lock in early-bird rates.
Got a spreadsheet that should be a web tool?
The beta is small and hands-on: I review every request personally, and if your workbook is unusual I will help you get it converted.
Free credits on approval · No credit card required