Fluids & Piping Calculators

Start with the flow relationship

Use the Pipe Flow Rate & Velocity Calculator to solve the missing part of Q = A × v. It is the first step before evaluating a pipe run, a pump duty point or a pressure-loss estimate.

• Pipe Flow Rate & Velocity CalculatorSolve flow rate, mean velocity or internal diameter from Q = A × v.

Pressure loss with stated assumptions

Use Darcy–Weisbach only after you can state the fluid condition, actual internal diameter, roughness and fitting losses. The live calculator exposes those values instead of hiding them behind a generic material label.

• Pressure Drop CalculatorEstimate major and minor pressure losses with Darcy–Weisbach and explicit fluid-property inputs.

Related live tools

• Pump Power CalculatorEstimate hydraulic, shaft and electrical power from a stated flow, head and efficiency.
• Reynolds Number CalculatorScreen internal-flow regime from density, viscosity, velocity and diameter.
• Hydrostatic Pressure CalculatorCalculate static pressure difference from depth, density and gravity.
• Pressure, Force and Area CalculatorCheck the basic relationship between pressure, force and area.

The calculation path

1. Establish the required flow rate, internal diameter or mean velocity.
2. Use the Reynolds number to understand the likely flow regime.
3. Evaluate friction and fitting losses using the real fluid, pipe material, length and operating condition.