Sunk Cost Fallacy Calculator

Estimate the rational decision point by comparing the future value of continuing vs. switching, while showing how much past investment is unrecoverable (sunk). Use it for projects, subscriptions, courses, or any ongoing commitment.

AI vs Human Cost Estimator

Estimate and compare monthly costs for completing a recurring workload using AI tools versus human labor. Adjust for workload volume, task complexity, quality requirements, and overhead to produce an estimated monthly cost range for each approach.

Marketing ROI Calculator

Estimate marketing return on investment (ROI) using campaign spend, revenue impact, gross margin, and optional overhead and attribution adjustments.