Hydraulics & Water Resources

Pipe flow, open channel, Manning's equation, and pump sizing tools.

Manning's Equation Calculator

Calculate flow velocity and discharge using Manning's equation for open channels and pipes. Includes roughness coefficient table.

10,000–20,000 Opportunity Score: 94

#14 Ranked

Hazen-Williams Pipe Flow Calculator

Calculate pipe flow velocity, discharge, and head loss using the Hazen-Williams formula for water supply and pressure pipe systems.

8,000–15,000 Opportunity Score: 91

#19 Ranked

Hydraulic Jump Calculator

Calculate sequent depth, energy loss, jump length, and classify jump type in rectangular channels for hydraulic jump analysis.

3,000–6,000 Opportunity Score: 78

#32 Ranked

Pump Power Calculator

Calculate hydraulic power, shaft power, motor power, specific speed, and annual energy cost for pumps. Supports multiple fluid types and unit systems.

5,000–10,000 Opportunity Score: 82

#33 Ranked

Stormwater Runoff Calculator (Rational Method)

Calculate peak stormwater runoff using the Rational Method (Q = CiA/360). Supports IDF rainfall, Kirpich time of concentration, and weighted land use C coefficients.

8,000–16,000 Opportunity Score: 88

#42 Ranked

Weir Flow Rate Calculator

Calculate flow rate over weirs using Francis, V-notch, broad-crested, Cipolletti, and ogee weir formulas. Supports velocity approach and end contraction corrections.

4,000–8,000 Opportunity Score: 82

#47 Ranked

Water Hammer / Surge Pressure Calculator

Calculate water hammer (surge) pressure rise, wave speed, critical closure time, and maximum pressure using Joukowsky and Michaud formulas for pipe systems.

3,000–7,000 Opportunity Score: 82