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English
$
USD
I will convert your excel spreadsheet into a web app or online calculator
Chirath J
About this gig
Turn your Excel spreadsheets into powerful, responsive web applications or online calculators. Whether you have complex formulas, financial models, pricing calculators, engineering calculations, business tools, or custom Excel logic, I'll transform them into a fast, interactive, and user-friendly web solution.
With 10+ years of experience in .NET, ASP.NET Core, C#, JavaScript, SQL Server, HTML, and CSS, I build secure, scalable, and mobile-friendly applications with clean, maintainable code.
What you'll get:
- Excel to Web App Conversion
- Custom Online Calculator Development
- Interactive Forms & Business Logic
- Responsive Design for All Devices
- Integration with Your Existing Website
- Fast Performance & Clean Code
- Reliable Communication & On-Time Delivery
I can convert everything from simple calculators to advanced Excel-based business systems.
Not sure which package fits? Send me a message - I reply fast and will recommend the right option.
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Chirath J
Chirath J
Experienced Full Stack Developer! Delivering Scalable and Secure Apps
- FromSri Lanka
- Member sinceAug 2014
- Last delivery1 year
Languages
English
Hi, I’m Chirath, a Full-Stack Web Developer with 10+ years of experience in building scalable and high-performance web applications. I specialize in:
✅ Front-End: React, JavaScript, HTML, CSS
✅ Back-End: .NET, .NET Core
✅ Cloud & Database: AWS, Digital Ocean, SQL Server, MongoDB, MySQL, PostgreSQL
I deliver clean, efficient, and secure code to create responsive and user-friendly applications. Let’s turn your ideas into reality! 🚀
FAQ
What do you need from me to get started?
Your Excel file and a short note on which cells are inputs and which are results. If you have a design or branding preference, share that too.
Will the web app give the same results as my Excel file?
Yes. I recreate every formula and test the app against your spreadsheet with sample inputs so the results match before delivery.
Can you add the calculator to my existing website?
Yes. I can deliver it as a standalone web app or embed it into your existing website (WordPress, custom HTML or other platforms).
Which technologies do you use?
HTML, CSS and JavaScript for simple calculators, and ASP.NET Core / C# with SQL Server for apps that need a database, logins or reports.
