Browse categories
Explore
Fiverr Pro
English
$
USD
I will build a custom interactive calculator or ROI estimator for a website
joshuagg
About this gig
Looking to boost user engagement and generate high-quality leads on your website? Interactive calculators keep visitors on your site longer and convert traffic into qualified buyers.
What I Build For You:
- ROI & Cost Savings Estimators
- Financial & Investment Calculators (NPV, IRR, Tax Deferral, Amortization)
- Energy, BESS & Engineering Estimators
- Instant Price & Quote Generators
- Custom Formula Solvers
Key Features:
- 100% responsive (mobile, tablet, desktop)
- Clean code with zero bloat or heavy dependencies
- Matches your brand colors, fonts, and styling
- Easy 1-click embedding on WordPress, Webflow, Shopify, Wix, Squarespace, or raw HTML
Please message me with your formulas or an example before ordering so we can discuss the exact scope!
Get to know joshuagg
joshuagg
Custom Interactive Calculators, Financial Engines, Web Widgets
- FromUnited States
- Member sinceMay 2026
Languages
English
Hi, I’m a developer and business tools builder specializing in interactive web calculators, financial & technical modeling tools, and custom automation. Whether you need a high-converting ROI calculator for your landing page, an interactive quote generator for your clients, or an embeddable widget for WordPress, Webflow, or Framer, I deliver fast, responsive, zero-dependency tools tailored to your brand. Let's make your website work harder for your business!
Other Software Development Services I Offer
FAQ
What platforms can you connect with Make.com or Zapier?
I can connect web calculators, Google Sheets, Gmail/Outlook, Stripe, Webflow, WordPress, Airtable, HubSpot, Slack, Discord, and custom REST API webhooks.
Will I receive instant SMS or email notifications when a new lead submits?
Yes. We can configure automated real-time dispatch alerts via Gmail, Twilio SMS, Slack channel alerts, or automated Google Sheets row logging the exact second a lead submits.
Do I need a paid Make.com or Zapier account?
Most standard lead workflows run easily on Make.com's free tier (up to 1,000 operations/month) or Zapier's free tier. I design workflows efficiently to minimize operation usage and keep your overhead at $0.
What if a webhook fails or drops a connection?
I implement error-handling routes, data fallback validation, and automatic backup logging to ensure zero lost leads or dropped data.
