Core Hydrology & Hydraulics Calculator is a professional engineering calculator app for civil engineers, water resources engineers, students, and site professionals.
Get fast, reliable hydrology and hydraulics results in seconds for design checks, field verification, and classroom use.
Stop wasting time with repetitive manual calculations and spreadsheets. This app helps you quickly compute flow, head loss, and discharge using widely used civil engineering formulas in a clean, easy interface.
Key formulas included:
• Manning’s Equation (open channel and pipe flow)
• Rational Method (peak runoff estimation)
• Hazen-Williams Equation (head loss or flow rate)
• Weir Flow discharge
• Orifice Flow discharge and velocity
Why this app is useful:
• Fast engineering calculations with clear outputs
• SI (Metric) and US (Imperial) unit systems
• Built-in warnings for unusual or unrealistic input ranges
• Material presets for Manning roughness coefficient (n)
• Return period factor support in Rational Method
• Practical, field-friendly design for daily engineering use
• No unnecessary complexity—focus on core results
Who it’s for:
• Civil Engineers
• Hydraulics Engineers
• Water Resources Engineers
• Drainage and stormwater designers
• Construction and site engineers
• Engineering students and educators
Core Hydrology & Hydraulics Calculator helps you save time, reduce repetitive effort, and improve consistency in day-to-day engineering calculations.
Important disclaimer:
This app is intended for preliminary calculations, educational use, and quick engineering checks. Always verify final design decisions using applicable codes, standards, project requirements, and professional engineering judgment.
If you need a reliable hydrology and hydraulics calculator for Manning, Rational, Hazen-Williams, Weir, and Orifice equations—this app is built for you.
What’s New (First Release)
Version 1.0.1
• Initial public release of Core Hydrology & Hydraulics Calculator
• Added Manning, Rational, Hazen-Williams, Weir, and Orifice calculations
• Added SI and US unit support
• Added smart warning messages and improved input validation
• Performance and UI improvements for fast engineering workflows