Isolated and conflict-resistant
Upload the exported folder to hosting you control, then paste the generated iframe. This is the broadest option for sites that allow embeds.
Legacy Tools by Local Legacy Consulting
Legacy ROI Calculator
Show customers the potential return from a product, service, project, or investment.
A focused, self-hosted roi calculator powered by the shared Calculation Engine. Customize it visually, export it, and install it without a required subscription.
Secure checkout by Stripe · One-time purchase · Self-hosted · Single-site license · No required subscriptionBuild it on the pageEdit the widget.
Edit the widget.
See every change.
Choose the content, layout, appearance, behavior, and installation settings while the responsive preview updates beside you.
ROI calculator for small businesses
Calculate the return, then explain the assumptions.
The basic formula is (gain from the investment − cost of the investment) ÷ cost of the investment × 100. A useful result depends on a consistent time period and an honest definition of both gain and cost.
Explore website calculators →Worked example
- Estimated gain
- $15,000
- Investment cost
- $5,000
- Net return
- $10,000
This is a planning example, not a guarantee. Compare the result with the time, risk, attribution limits, and other costs behind the estimate.
Before trusting the percentage
- Use the same time period for gains and costs.
- Include implementation, labor, platform, and ongoing costs.
- Separate projected revenue from profit.
- Document assumptions so another person can review them.
- Compare the estimate with actual results after launch.
Customize this self-hosted ROI calculator for marketing, websites, services, products, or internal planning without sending calculation data to Local Legacy Consulting.
What it doesUseful on the page.
Useful on the page.
Flexible behind it.
A focused, self-hosted roi calculator powered by the shared Calculation Engine. Customize it visually, export it, and install it without a required subscription.
Main features
- ✓ No Code
- ✓ Visual Builder
- ✓ Calculations
- ✓ Mobile Responsive
- ✓ Templates Included
- ✓ Self Hosted
- ✓ Offline Setup
- ✓ Custom CSS
Who it is for
- → Professional Services
- → B2B
- → SaaS / Subscription
Example uses
- → ROI Calculator
Installation
Two dependable ways to install.
Tighter page integration
Use the generated Web Component. Shadow DOM scopes styles and a namespaced custom element avoids host-page CSS and JavaScript collisions.
Compatibility depends on what your website plan and editor permit. Wix and Squarespace may restrict custom code by plan; the included guide uses only documented HTML/embed features. Lead submissions go only to the customer-supplied endpoint.
What is included
Everything stays in the folder.
- START-HERE visual setup screen
- Production widget files
- Starter templates and examples
- Platform installation guides
- Plain-language license
- Version and configuration files
Simple commercial licensing
Single Site covers one customer-owned website. Agency licensing is available for use on multiple client sites. There is no invasive DRM and the widget does not stop working if a license server is unavailable.
Good to know.
Does it require a subscription?
No. The listed price is a one-time purchase; hosting from your chosen provider may have its own cost.
Does it send data to Local Legacy Consulting?
No. Downloaded tools contain no hidden analytics or lead relay. Forms submit only to the endpoint the owner configures.
Can I edit it without coding?
Normal content, design, logic, preview, and export tasks are handled in START-HERE. Advanced integration may still benefit from a developer.
Will it work on my site?
It works where your platform and plan allow HTML, JavaScript, an iframe, or embed code. Review your host’s current custom-code rules before purchase.
Complete toolkit
View toolkit →Get every finished tool for $450.
$1200+ combined individual value, with the same self-hosted ownership.