Flow Metering
Blend Calculator (Temperature + Concentration)
Two-stream mass and energy balance.
Open calculatorCalculators
Flow calculators
Control-valve sizing, piping head loss, pump duty and NPSH, flow metering, tank strapping, and control-loop checks — every output labeled, every formula visible.
Control Valves
Choked Flow & Cavitation Check
Allowable drop with choked-flow flag.
Open calculatorFlow Metering
Weir Flow (V-Notch + Rectangular)
Open-channel weir equations side by side.
Open calculatorPiping & Head Loss
Hydraulic Diameter
Dh = 4A/P plus equivalent circular diameter.
Open calculatorPiping & Head Loss
Gas Pipeline Pressure Drop (Screening)
Single-pass gas line drop with Haaland friction.
Open calculatorPiping & Head Loss
Pipe Wall Thickness (Barlow)
Barlow wall with mill and corrosion allowance.
Open calculatorTanks & Level
Capsule (Bullet) Tank Volume
Horizontal capsule volume at any level.
Open calculatorControl Loops
PID Tuning (Ziegler-Nichols)
Classic ZN P/PI/PID gains from Ku and Tu.
Open calculatorPumps
VFD Energy Savings & Payback
Affinity-law savings with payback years.
Open calculatorPumps
Pump Duty Point Solver
Pump-system curve intersection, closed form.
Open calculatorPumps
Total Dynamic Head (TDH)
Static plus friction, minor and pressure head.
Open calculatorFlow Metering
Venturi Meter Flow (Screening)
Venturi dP to flow with throat geometry.
Open calculator