I will build a custom web calculator or ROI tool for your website

M
milancseresznye
M
milancseresznye
Milan C.
build a custom web calculator or ROI tool for your website
Full Screen
build a custom web calculator or ROI tool for your website
Full Screen
Full Screen
build a custom web calculator or ROI tool for your websitebuild a custom web calculator or ROI tool for your websitebuild a custom web calculator or ROI tool for your website

About this gig

Are you looking to boost conversions, engage visitors, or provide instant estimates with a custom web calculator?

You are in the right place. I build lightning-fast, highly responsive, and tailor-made interactive calculators and web widgets designed to integrate seamlessly into your existing website (Shopify, WordPress, Webflow, custom HTML, etc.).


️ What I Can Build For You:

  • ROI & Financial Calculators: Show customers exact savings or earnings.
  • Pricing & Quote Estimators: Let clients calculate custom project costs instantly.
  • Mortgage & Loan Calculators: Clean math logic with real-time updates.
  • Interactive Quizzes & Lead Forms: Step-by-step logic flows that capture leads.

Tech Stack:

  • Frontend: React, JavaScript / TypeScript, Tailwind CSS
  • Integration Ready: Embeds easily. Optional webhooks to push data straight to your CRM, Google Sheets, or email tools.


Why Work With Me?

  • Clean, Bug-Free Code: Meticulously written math logic and reactive state management.
  • Fast Delivery & Clear Communication: Quick turnarounds with proactive updates at every step.

Got a specific formula, design, or logic flow in mind? Send me a message, and let's bring your interactive tool to life!

  • Programming language

    • JavaScript

  • Expertise

    • Algorithms & Data structures
    • Performance
    • Design
    • Testing procedures

  • Frontend framework

    • Next.js
    • React.js
    • Tailwind CSS

  • Backend framework

    • Express.js
    • Node.js
    • Supabase

Get to know Milan C.

Milan C.

Full Stack Developer and Web Component Specialist

  • FromHungary
  • Member sinceSep 2026

  • Languages

    Hungarian, English, German
Hey, I'm a web developer specializing in custom interactive components, webhooks, and modern UI solutions. I help businesses enhance their sites with high-converting features: • Custom Calculators & ROI Tools • Pricing & Comparison Tables • Webhook & API Automation • Interactive Search FAQs • Custom Embed Restyling I focus on rapid delivery, clean code, and simple setup guides so you get custom features without backend headaches.

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