03 of 05 / Service
Custom
Logic & Calculators
Transform complex spreadsheets into lead-generating machines. I build interactive ROI and pricing calculators that provide instant value to your clients and capture high-intent data.
- JavaScript
- React
- Lead Gen
// What you get
- React/Vue Framework Integration
- Lead Capture & Email Logic
- Complex Formula Implementation
- Interactive Data Visualization
// References
Calculators I built
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Solar Panel Calculator
Multi-step estimator: electricity bill, roof type, orientation and tilt, then the address on a map, ending in an offer request.
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Mortgage Calculator
Monthly payment and the maximum loan a net salary supports, with a contact form for personalised advice.
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Total Compensation Calculator
Base salary, bonus, equity and sign-on bonus laid out over four years in a table and a stacked chart.
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Retirement Investment Calculator
Portfolio growth plotted against a retirement target, comparing retiring today with retiring at the goal.
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Home Energy Savings Calculator
Visual selectors for boiler, cooking, heating and window types that feed the savings estimate.
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Home Sale Net Profit Calculator
Compares the estimated net profit of a service-led sale against a traditional one, side by side.
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Wall Material Calculator
Material quantities for interior and exterior walls, with several walls in tabs and export to PDF and Excel.
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Building Rules Calculator
Works out floor area ratio, lot coverage, yard setbacks and maximum building height for a lot.
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Retirement Planning Quiz
A 14-step guided questionnaire with a progress bar and illustrated answer choices.
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Pet Transport Quote Calculator
Four-step quote flow: basic info, pet details, ride details and the quote.
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Pre-Qualification Check
Short eligibility check with device choices and a completion ring that fills as the visitor answers.
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Order Manager
POS order dashboard for UberEats, JustEat and Deliveroo orders, with live status counts and bulk accept, schedule, print and reject. Built in React with a Node.js backend on the POS API.
Trusted by previous partners
// Feedback
What clients say
“Milan is very proactive and keen to help, ready to find a solution and passionate about the project. Highly recommend to work with him.”
Renata
Client • Fiverr
“Very happy with the outcome. Milan was very nice and completed the order quickly. Thank you!”
Melanie
Client • Fiverr
“I am very satisfied. Milan pays attention to details, the code he delivered is very clean and easy to understand. Fantastic job, I will order more!”
Attila
Client • Fiverr
“Milan delivered a perfect, bug-free code with impressive attention to detail and expertise. Working with him was a breeze thanks to his quick responses and dedication. He truly went above and beyond. Highly recommend!”
michaelcaugh
United States • Fiverr
“Milan was by far the best freelancer I've ever worked with. He went above and beyond to make our project incredible. I will be using Milan again in the future 100%.”
traderpilot
Australia • Fiverr
“Milan was fantastic and created my vision. From start to finish he was patient, really helpful, knowledgeable and added some features I hadn't thought of to make it the best it could be.”
pinnaclefunding
United Kingdom • Fiverr
“He helped us out with a website that was down and fixed everything perfectly, not a simple job. Thank you.”
avrom123
United Kingdom • Fiverr
“Milan updated the website successfully and executed several fixes. Beyond this, he is a decent and selfless person in delivering his tasks.”
Client
Website maintenance • Upwork
“Always a pleasure with Milan. Reliable and patient. The journey continues…”
Client
Website maintenance • Upwork
Verifiable reviews: Fiverr · Upwork · Freelancer