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Fiverr Pro
English
$
USD
I will build a custom ROI or pricing calculator for your website
Ellie Zhang
About this gig
I build custom interactive web calculators for SaaS companies, service businesses, and websites.
I can turn your formulas or business rules into a polished calculator that helps visitors understand pricing, savings, ROI, quotes, or other business results instantly.
Your calculator can include:
ROI and savings calculations
Pricing and quote estimators
Cost or profitability calculators
Real-time results
Sliders and precise numeric inputs
Conditional calculation logic
Charts and visual result breakdowns
Responsive desktop and mobile design
Branded UI
Source code
This Gig is best for calculators with clearly defined inputs, formulas, and expected outputs.
For calculation accuracy, please provide your formula or calculation rules plus 23 sample calculations with known input and expected output values.
I build the calculator itself. Complex backend systems, databases, authentication, payments, CRM/webhook integrations, email automation, and complex third-party integrations are not included in the standard packages.
If your calculator is based on a spreadsheet or requires complex logic, please message me before ordering so I can confirm the scope.
Get to know Ellie Zhang
Ellie Zhang
Interactive Web Designer and Front End Prototyper
- FromChina
- Member sinceSep 2026
Languages
Chinese, English
I design and build interactive web experiences for products, startups, and brands. My work includes animated landing pages, 3D product viewers and simple configurators, functional prototypes, and interactive ROI or pricing calculators. I focus on clear UX, polished motion, and practical front-end implementation using React, GSAP, Three.js/R3F, and modern web tools. For 3D projects, I work with provided or prepared 3D assets and build the web interaction, presentation, and configurator experience around them.
FAQ
What do you need from me to build the calculator?
Please provide the required inputs, formulas or calculation rules, expected outputs, and ideally 2–3 sample calculations with known input and expected result values. Brand colors, logo, and visual references are also helpful.
Can you create the formulas for me?
I can implement and structure clearly defined business formulas, but the underlying financial, pricing, or business assumptions should come from you. If your logic is not yet defined, please message me before ordering.
Can you build a calculator from my Excel spreadsheet?
Yes, a spreadsheet can be used as a reference when the required formulas and logic are clear. Simple spreadsheet-based calculators may fit the standard packages. Complex workbooks, macros, multiple sheets, or large calculation systems require a custom quote.
Will the calculator work on mobile?
Yes. All standard packages include responsive design for desktop and mobile browsers.
Can you install it directly on my website?
The standard packages include the working calculator and source code. Direct installation into WordPress, Shopify, Webflow, Wix, or another existing website depends on the platform and setup, so please message me first if installation is required.
What is included in a revision?
A revision covers adjustments to styling, labels, layout, or calculation behavior within the originally agreed formulas and scope. New formulas, new calculator steps, additional inputs, integrations, or new features are outside the original revision scope.
