Interactive ROI Calculator & Lead Magnet Tool for a Growth Marketing Consultancy

Overview

Built an interactive ROI calculator for a growth marketing consultancy to use as a lead magnet on its website, letting visitors input their current marketing spend and conversion metrics to see a personalized projection of potential improvement. Capturing an email address to unlock the detailed results, the tool feeds qualified leads directly into the consultancy's CRM tagged with the inputs they provided, giving the sales team useful context before the first call. This replaced a generic downloadable PDF lead magnet that wasn't generating meaningful engagement or differentiating the consultancy from competitors offering the same kind of content. The calculator's underlying assumptions were built directly from the consultancy's own client benchmark data. A growth marketing consultancy's generic downloadable PDF lead magnet wasn't generating meaningful engagement or differentiating it from competitors offering similar content. We built an interactive ROI calculator, using the consultancy's own client benchmark data, that lets visitors input their marketing spend and metrics to see a personalized improvement projection, capturing an email to unlock detailed results and feeding qualified leads directly into the CRM with context attached. We built the calculator's underlying assumptions directly from the consultancy's own client benchmark data rather than generic industry averages, then tested the projection logic against several real past client outcomes for credibility. It launched as an A/B test against the existing PDF offer before fully replacing it. The calculator became the consultancy's top-converting lead magnet, generating an estimated 3x more qualified inquiries than its previous downloadable PDF offer, with the sales team now starting calls already informed by each lead's own inputs.