I will build custom interactive calculator or web widget with HTML CSS js

P
patapimims
P
patapimims
Ryan
build custom interactive calculator or web widget with HTML CSS js
Full Screen
build custom interactive calculator or web widget with HTML CSS js
Full Screen
build custom interactive calculator or web widget with HTML CSS jsbuild custom interactive calculator or web widget with HTML CSS js

About this gig

Looking for a custom, fast, and interactive calculator or web widget for your website?


Interactive tools engage visitors, keep them on your page longer, and drastically improve conversions. I develop clean, lightweight, and 100% responsive web calculators using pure HTML, CSS, and modern JavaScript.


What I Can Build:

- Finance & Real Estate: Loan, mortgage, interest, ROI, and investment calculators.

- Health & Fitness: BMI, calorie intake, macro, and workout metrics.

- Service & E-commerce: Custom quote estimators, dynamic pricing, and product cost calculators.

- Custom Math: Any custom formula or spreadsheet logic turned into a web widget.


What You Will Receive:

- Ready in under 1 hour of work

- 100% responsive design (flawless on mobile, tablet, and desktop)

- Clean, well-commented HTML, CSS, and JavaScript source code

- High performance (zero heavy dependencies, loads instantly)

- Easy integration into WordPress, Webflow, Shopify, Wix, Squarespace, or raw HTML

- Fully tested calculation logic


Please message me with your formula, spreadsheet, or concept before ordering so we can discuss the exact requirements!

  • Programming language

    • JavaScript

  • Expertise

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

  • Frontend framework

    • Bootstrap
    • jQuery
    • React.js
    • Tailwind CSS
    • Vue.js

  • Backend framework

    • Express.js
    • NestJS
    • Next.js
    • Node.js

Get to know Ryan

Ryan

Frontend Web Developer

  • FromGermany
  • Member sinceOct 2026
  • Avg. response time1 hour

  • Languages

    English, Russian, German
Hi! I help people and small businesses get texts and small digital tasks done quickly and well. What I can do: - Proofreading and editing in English, German and Spanish - Writing: product descriptions, emails, social media posts, CVs - Translation between English, German, Spanish and Russian - Excel and Google Sheets formulas - Simple one-page websites - And that's not all: if you have another task, just ask! I'm new on Fiverr, so I put extra care into every order and reply fast. Message me before ordering and we'll find the best way to get it done.

My Portfolio

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