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English
$
USD
I will convert excel to web calculator or build custom web calculator
Hassan Raza
4.8
4.8
About this gig
Tired of distributing messy, insecure Excel files? Or paying monthly fees for rigid SaaS calculator builders?
I will convert your Excel spreadsheets into secure, blazing-fast, pixel-perfect web calculators or build an interactive pricing estimator from scratch.
Whether you need a lead-generation tool for your SaaS, a mortgage calculator for real estate, a macro calculator for a health site, or an internal product pricing configurator, I deliver custom solutions with ZERO monthly platform fees.
WHAT I SPECIALIZE IN:
- Legacy Excel Conversion replicate multi-tab sheets, formulas, VLOOKUPs into clean React/Next.js
- Lead-Generation Calculators email gate to unlock results, auto-sync to your CRM
- Interactive Pricing Estimators sliders and dynamic inputs for instant quotes
- Financial Scenarios loan, amortization, compound interest, debt payoff, savings
- Health & Fitness BMI, body fat, macro, calorie trackers
- Construction Cost Estimators materials, renovation, labor cost predictors
WHY WORK WITH ME?
- NO MONTHLY FEES pay once, own the code forever.
- IP PROTECTION formulas run securely server-side.
- LIMITLESS COMPLEXITY any conditional logic or lookups.
Message me with your Excel file or idea.
Get to know Hassan Raza
Hassan Raza
Full Stack Developer building Custom Web Apps SaaS and AI Solutions
- FromPakistan
- Member sinceNov 2020
- Avg. response time1 hour
- Last delivery9 months
Languages
English, Urdu, Hindi, Punjabi
Hi, I'm Hassan, a full-stack developer with 5+ years of experience building production web apps, SaaS platforms, and AI solutions for clients worldwide. I specialize in React.js, Next.js, NestJS, TypeScript, Node.js, MongoDB, PostgreSQL, MySQL, Supabase, Stripe, and AI integration, delivering complete products end to end: frontend, backend, database, and deployment. I've shipped real products like Sneakertopia (AI platform) and EyewearStream (e-commerce with 50+ variants). My focus is clean, scalable code, clear communication, and on-time delivery. Message me to discuss your project.
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Other Software Development Services I Offer
FAQ
Can you handle complex formulas and multiple tabs?
Yes — VLOOKUPs, nested IFs, math equations, and interconnected sheets, translated cleanly into React/Next.js.
How do you protect my proprietary formulas?
For sensitive math I use Next.js Server Components — calculations run on a secure server; only results reach the browser.
Can it embed in WordPress, Wix, Squarespace, Shopify, or Webflow?
Yes — as a responsive widget via iframe, shortcode, or direct insertion. Looks native to your site.
How do you handle decimal precision / floating-point errors?
Custom rounding/precision libraries ensure accuracy down to the decimal — critical for financial calculators.
Do you offer automatic PDF generation?
Yes — included in Premium (available as an extra on Standard). Branded PDF summary with results and graphs.
Can it capture emails before showing results?
Yes — gate the results behind a name/email form, then unlock and sync the lead to your CRM.
Reviews
5 reviews for this Gig
| (4) | ||
| (1) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
F 
florianamstutz
Spain
A great experience ! Thank you !
$100-$200
Price
9 days
Duration
Helpful?F florianamstutz
Spain
It's always a great pleasure to work with Hassan. A very competent and smart personn.
$100-$200
Price
7 days
Duration
Helpful?F florianamstutz
Spain
Hassan created exactly what we had in mind, and we thank him for his excellent work.
$200-$400
Price
6 weeks
Duration
Helpful?C chrisruiz161
United States
Nice finished product. Hassan created a website calculator from an Excel calculator.
$200-$400
Price
8 days
Duration
Helpful?F frankfeddersen
Denmark
Fantastic experience, great design and excellent execution. Not only was he able to code the exact website that I was looking for, he was also able to make custom adjustments. There are no worries with Hassan since you are working with someone who will go above and beyond to help you with your coding...
I 
Seller's Response
Helpful?
Reviews
5 reviews for this Gig
| (4) | ||
| (1) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
F florianamstutz
Spain
A great experience ! Thank you !
$100-$200
Price
9 days
Duration
Helpful?F florianamstutz
Spain
It's always a great pleasure to work with Hassan. A very competent and smart personn.
$100-$200
Price
7 days
Duration
Helpful?F florianamstutz
Spain
Hassan created exactly what we had in mind, and we thank him for his excellent work.
$200-$400
Price
6 weeks
Duration
Helpful?C chrisruiz161
United States
Nice finished product. Hassan created a website calculator from an Excel calculator.
$200-$400
Price
8 days
Duration
Helpful?F frankfeddersen
Denmark
Fantastic experience, great design and excellent execution. Not only was he able to code the exact website that I was looking for, he was also able to make custom adjustments. There are no worries with Hassan since you are working with someone who will go above and beyond to help you with your coding...
I Seller's Response
Helpful?
