The Manning's Calculator is an essential tool for engineers and hydrologists, designed to facilitate the calculation of water flow in open channels and pipes. Leveraging Manning's formula, it offers a user-friendly interface for inputting channel dimensions and roughness coefficients, enabling quick and accurate flow rate and velocity estimations. This tool is invaluable for designing and analyzing water systems, ensuring efficient and environmentally compliant water resource management. Its ease of use and precision make it a go-to resource for professionals in the AEC domain.