Drupal-WordPress Custom Calculator Build

I’m migrating a site from Drupal to WordPress and need a developer who has already navigated this exact path. Another specialist will handle the bulk of the content migration; your focus is a custom calculator that must be rebuilt in WordPress so it mirrors the current Drupal version in both logic and presentation.

The tool will accept user choices through 4-6 dropdown menus and, based on existing algorithms that I will share, (I don't believe they will have to be created, but will need to verify this )return clear text-based and image results on the same page. No other input types are required. I will supply the live Drupal link, the formulas, and design references once I’ve seen examples of your previous Drupal-to-WordPress work.

Because this calculator influences key business decisions, we’ll first draft a concise scope of work together, then move into development, testing, and final integration with the migrated WordPress theme. Clean, well-documented PHP/JavaScript and an admin-friendly settings panel are important to me so the marketing team can tweak values later without touching code.

If you have shipped similar calculators or plugins during a Drupal migration, tell me what made them successful and how you handled data mapping and edge-case testing. Personalised responses only—generic AI-generated blurbs will be set aside.