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.
315 examples
Steady-State Mass Balance
Outlet mass flow from a steady-state balance of two inlet streams.
Cable Tension from Sag
Horizontal tension in a cable from its span, load and sag.
Cable Sag
Mid-span sag of a loaded cable from its tension, span and load.
Shear Flow in a Built-Up Beam
Shear flow at a joint in a built-up beam from the shear force and first moment of area.
Cantilever Deflection from End Moment
Tip deflection of a cantilever loaded by a moment at its free end.
Springs in Series
Equivalent stiffness of two springs connected in series.
Springs in Parallel
Equivalent stiffness of two springs connected in parallel.
Damping Ratio
Damping ratio of a vibrating system from its damping, stiffness and mass.
Period from Frequency
Oscillation period from the frequency.
Cantilever Beam Reaction (UDL)
Support reaction of a cantilever beam carrying a uniformly distributed load.
Centroid of a Composite Area
Centroid location of a two-part composite area.
Road Gradient
Gradient (slope) of a road or pipe as a ratio of rise to run.
Earthwork Volume (Average End Area)
Earthwork volume between two cross-sections by the average-end-area method.
Stadia Distance
Horizontal distance from a stadia (tacheometric) staff reading.
Horizontal Curve Length
Arc length of a horizontal road or railway curve.
Tank Fill Time
Time to fill a tank from its volume and the inflow rate.
Water–Cement Ratio
Water–cement ratio of a concrete mix from the water and cement masses.
Brick Quantity for a Wall
Number of bricks needed to build a wall from the wall and brick face areas.
Rational Method Peak Runoff
Peak stormwater runoff from a catchment by the Rational Method.
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.
Sound Intensity Level (Decibels)
Sound level in decibels from the sound intensity.
Speed of Sound in a Gas
Speed of sound in an ideal gas from its temperature.
Wave Speed
Speed of a wave from its frequency and wavelength.