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.
515 examples
Truss Diagonal Member Force
Axial force in a truss diagonal carrying a panel shear.
Hollow I-Section Second Moment of Area
Second moment of area of a built-up or hollow rectangular (I-type) section.
Wind Pressure on a Surface
Dynamic wind pressure on a surface from the wind speed.
Roof Snow Load
Design snow load on a roof from the ground snow load and a shape coefficient.
Concrete Cylinder Compressive Stress
Compressive stress in a standard concrete test cylinder under load.
Rebar Tension Capacity
Yield tension capacity of reinforcing steel from its area and yield strength.
Shear Reinforcement Capacity
Shear carried by vertical stirrups in a reinforced-concrete beam.
Modular Ratio
Ratio of steel to concrete elastic moduli used in transformed-section analysis.
Belt Capstan (Friction) Tension
Tight-side tension of a belt or rope over a pulley using the capstan equation.
V-Belt Power Transmission
Power transmitted by a belt drive from its tension difference and speed.
Journal Bearing Pressure
Projected bearing pressure of a journal (plain) bearing.
Disc Brake Torque
Braking torque from a disc brake’s friction force and radius.
Torque to Angularly Accelerate
Torque required to angularly accelerate a rotating mass.
Centrifugal Force of a Rotating Mass
Outward centrifugal force on a mass rotating at angular speed.
Hydraulic Cylinder Force
Output force of a hydraulic cylinder from the supply pressure and bore.
Fatigue Endurance Limit (Estimate)
First-estimate endurance limit of a steel from its ultimate tensile strength.
Continuity: Velocity Change
Velocity after a change of pipe area from the continuity equation.
Hydraulic Radius of a Channel
Hydraulic radius of a flow cross-section from its area and wetted perimeter.
Froude Number
Froude number of an open-channel or marine flow.
Rectangular Weir Flow
Discharge over a sharp-crested rectangular weir.
Pump Affinity Law (Flow vs Speed)
New pump flow rate when its speed changes, via the affinity laws.
Pipe Friction Pressure Drop
Frictional pressure drop along a pipe from the Darcy–Weisbach equation.
Capillary Rise
Height a liquid rises in a fine tube by surface tension.
Stokes Drag on a Sphere
Viscous drag on a small sphere moving slowly through a fluid.