Product Overview
Most ROI calculators on landing pages are either a hosted subscription tool or a black box that quietly hides its formulas. NOVA is neither. It is an editable, static HTML, CSS, and JavaScript landing page and ROI calculator built for growth consultants, conversion agencies, SaaS marketers, web studios, and small business teams who need to turn conversion assumptions into a transparent, decision-ready business case.
Visitors enter their own traffic, conversion rate, customer value, margin, and cost assumptions, and NOVA immediately calculates added customers, added revenue, gross benefit, total investment, net benefit, ROI, payback period, and the conversion lift required to break even. Results appear before the optional contact form, so a prospect sees the value of the conversation before you ask for their details. The whole kit is local-first: it loads no remote assets, makes no network request until the site owner adds one, and needs no build step, framework, or subscription to run.
Key Features
- Instant ROI calculation — added customers, revenue, gross benefit, investment, net benefit, ROI, and payback appear as soon as assumptions are entered.
- Sensitivity analysis — shows how results shift as key assumptions move, so visitors can stress-test their own numbers.
- Break-even conversion lift — calculates the minimum conversion improvement needed to justify the investment.
- JSON and CSV export — visitors can save their scenario and inputs for their own records or a follow-up call.
- Local save — scenarios persist in the browser so a returning visitor does not have to re-enter their numbers.
- Print-ready reporting — a formatted report view for sharing the business case internally.
- Optional contact capture — a lead form appears after the results, not before, for a value-first flow.
- No framework, build step, or runtime dependency — plain HTML, CSS, and JavaScript that runs by opening a file in a browser.
- Local-first and tracking-free — loads no remote assets and makes no network request until the site owner configures one.
- Fully editable source — branding, currency, and copy are controlled through a single configuration file.
What’s Included
43 files in one ZIP, organized into five folders.
- Product/ — the working kit: index.html plus assets/config/nova-config.js, assets/css/nova.css, assets/js/nova-app.js, assets/js/nova-calculator.js, assets/js/nova-form-adapter.js, and assets/favicon.svg (7 files).
- Documentation/ — 25 files covering setup and technical reference, including Quick_Start_Guide.pdf, README.md, Architecture.md, UI_Spec.md, Technical_Specification.yaml, Formula_Register.csv, Browser_Compatibility.md, Data_Privacy_Sheet.md, Security_and_Privacy.md, Test_Report.md, CHANGELOG.md, SHA256SUMS.txt, and per-browser QA and end-to-end test reports (Chromium, Edge, Firefox, WebKit, Lighthouse, QA_v2.6_Report.json).
- Editable/ — Customization_Guide.md and Source_README.md, plus a Tests folder with calculation_vectors.json, run_e2e_tests.py, and run_unit_tests.js (5 files).
- Bonus/ — NOVA_Assumption_Quality_Worksheet.pdf, NOVA_Deployment_Checklist.pdf, and NOVA_Formula_Reference.pdf (3 files).
- License/ — License.txt, Code_License_Addendum.txt, and Third_Party_Notices.txt (3 files).
Who This Is For
- Growth consultants who need a repeatable way to show clients a data-backed business case.
- Conversion rate optimization agencies presenting projected impact before starting a project.
- SaaS marketers who want a self-serve ROI tool on a pricing or landing page.
- Web studios looking for a dependency-free calculator kit they can re-skin for multiple clients.
- Small business teams that need an internal tool to model the payback on a marketing or tooling spend.
Why Choose This Product
- No subscription or hosted service — NOVA is a one-time download that you own and run yourself, unlike monthly calculator SaaS tools.
- Transparent formulas, not a black box — the Formula_Register.csv and Formula_Reference PDF document exactly how every number is calculated.
- Genuinely local-first — no remote assets and no tracking by default, which matters for privacy-conscious clients and internal tools.
- Documentation-heavy delivery — 25 documentation files plus cross-browser QA and end-to-end test reports back up the claim that it works as described.
How To Use
- Unzip the download and open Documentation/Quick_Start_Guide.pdf first.
- Open Product/index.html directly in a current browser to see the calculator running with its default scenario.
- Edit Product/assets/config/nova-config.js to set your own branding, currency, and default assumptions.
- Adjust copy, layout, or calculation logic using the files in Editable/, referring to Customization_Guide.md.
- Deploy the Product/ folder to any static web host, following the checklist in Bonus/NOVA_Deployment_Checklist.pdf.
Frequently Asked Questions
What format are the files? A ZIP containing static HTML, CSS, and JavaScript source files, PDF and Markdown documentation, JSON test and QA reports, a YAML technical specification, and plain-text license files — 43 files in total.
Can I edit the files? Yes. All HTML, CSS, and JavaScript source in the Product and Editable folders is fully editable, and the Customization_Guide.md walks through the supported configuration points.
What software do I need? Any current web browser to run and preview the kit, a text editor to change the source files, and any static web host to deploy it. No build tools, frameworks, or paid software are required.
Is this for personal or commercial use? Both, within the license terms. The license permits use for personal projects, your own business, and one client end project per purchased license when commercial or client use applies; reselling or redistributing the kit itself is not permitted.
What is the refund policy? As a digital download, this product is non-refundable once downloaded. If a file is missing or corrupted, contact us and we will send a replacement.
Does NOVA require an internet connection to run? No. It is local-first, loads no remote assets, and makes no network request until you configure one yourself, such as connecting the contact form to your own backend.
Can I use NOVA for more than one client? The included license covers one client end project per purchased license; check the Code_License_Addendum.txt for the exact scope before reusing it across multiple clients.
Is there proof the calculator has been tested? Yes, the Documentation folder includes cross-browser end-to-end test reports for Chromium, Edge, Firefox, and WebKit, plus a Lighthouse performance summary.
Bonus
Three bonus PDFs are included at no extra cost: the NOVA Assumption Quality Worksheet, to sanity-check the numbers a client feeds into the calculator, the NOVA Deployment Checklist, for a smooth static-host launch, and the NOVA Formula Reference, a plain-language walkthrough of every calculation the tool performs.
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