We introduce an open-access web tool that estimates when quantum systems will outperform classical computers for specific algorithms on a cost‑equivalent basis. Built on the Choi–Moses–Thompson framework, it lets users vary assumptions about error correction, gate speeds, overheads, connectivity, hardware roadmaps, and classical baselines. We find that expected timing for advantage is robust for some algorithms (e.g., Shor's) but contingent for others (e.g., Grover's), depending on technical factors.