Example engineering calculations
Worked, unit-aware calculation worksheets across structural, mechanical, electrical and more. Open any example into your own workspace to edit and reuse. New to Calculeaf? Start with your first worksheet or the examples guide.
56 examples found
Bernoulli Pressure Change
Pressure at a second point along a streamline from Bernoulli’s equation (same elevation).
Bulk Modulus of a Fluid
Bulk modulus of a fluid from a pressure change and the volume change it causes.
Specific Energy in Open Channel Flow
Specific energy of open-channel flow from depth and velocity.
Pressure Head
Equivalent height of fluid (head) for a given pressure.
Pump Overall Efficiency
Overall efficiency of a pump from its hydraulic and shaft power.
Velocity Head
Velocity head (kinetic energy per unit weight) of a flowing fluid.
Mass Flow Through a Nozzle
Mass flow rate through a nozzle from density, area and velocity.
Venturi Meter Flow Rate
Flow rate from the pressure drop across a venturi meter.
Flat-Plate Reynolds Number
Reynolds number for flow over a flat plate from the plate length.
Pipe Full-Bore Flow
Flow rate of a pipe running full from its area and velocity.
Specific Gravity
Specific gravity of a fluid relative to water.
Bernoulli Total Head
Total head of a flowing fluid — the sum of elevation, pressure and velocity heads.
Open Channel Discharge (Manning Conveyance Form)
The discharge through an open channel from its lumped conveyance factor and bed slope, using the conveyance form of Manning's equation.
Hydraulic Jump Sequent Depth Ratio
The downstream (sequent) depth that follows a hydraulic jump in an open channel, from the upstream Froude number.
Critical Depth in a Rectangular Channel
The critical flow depth in a rectangular open channel, the depth at which specific energy is minimized for a given discharge.
Specific Energy in an Open Channel
The specific energy of open-channel flow at a given depth and unit discharge, combining potential and kinetic energy relative to the channel bed.
Choked Compressible Flow Rate Through an Orifice
The maximum (choked) mass flow rate of a compressible gas discharging through an orifice from a high-pressure reservoir.
Isentropic Stagnation Pressure from Mach Number
The stagnation (total) pressure of a compressible flow at a given static pressure and Mach number, from the isentropic flow relations.
Water Hammer Pressure Surge (Joukowsky Equation)
The pressure surge generated by a sudden change in flow velocity in a pipeline, from the Joukowsky water hammer equation.
Net Positive Suction Head Available (NPSHa)
The net positive suction head available at a pump's suction, the margin above vapor pressure that keeps the pump from cavitating.
Cavitation Number
A dimensionless index comparing the local pressure margin above vapor pressure to the flow's dynamic pressure, used to assess cavitation risk.
Control Valve Flow Coefficient (Kv, Metric)
The metric flow coefficient Kv of a control valve, derived from its flow rate, fluid specific gravity, and pressure drop.
Pump Specific Speed (Dimensionless Index)
A shape-classifying index for centrifugal pumps computed from the plain numeric rpm, gpm, and feet-of-head values at the best efficiency point.
Pump System Curve Operating Head
The total dynamic head a pump must overcome at a given flow, combining a fixed static lift with head loss that grows with the square of flow rate.