Calculating marketing qualified leads comes down to one honest question: how many of your leads actually survived a real conversation? The math is simple — CPQL equals total marketing spend divided by qualified leads — but the research is clear that the hard part is connecting qualification data to marketing source data before your cost-per-lead numbers hide a 95% waste rate (as WhatConverts puts it). Start by defining MQLs through verified call outcomes rather than form fills alone, translate your BANT criteria into script questions, and route every disposition code back into your CRM so the connection stops being theoretical. That's exactly how My AI Call Center runs lead qualification campaigns: one clear goal, approved scripts, and outcome reports routed to your team. If you want to see what your real CPQL looks like, the first campaign review is free — and you'll know the full number before anything launches.