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
Impulse of a Force
Impulse delivered by a force acting for a time, equal to the momentum change.
Mechanical Power
Average mechanical power from work done over a time interval.
Specific Heat from Test Data
Specific heat capacity of a material from measured heat, mass and temperature rise.
Vertical Effective Stress
Effective vertical stress in soil from total stress and pore-water pressure.
Rankine Active Earth Pressure Coefficient
Active earth pressure coefficient from the soil friction angle.
Rankine Passive Earth Pressure Coefficient
Passive earth pressure coefficient from the soil friction angle.
Active Earth Thrust on a Wall
Total active earth thrust per metre of retaining wall.
Bearing Capacity (Cohesion Term)
Ultimate bearing capacity contribution from soil cohesion (Terzaghi).
Consolidation Settlement
Primary consolidation settlement of a clay layer from its compression index.
Darcy Seepage Velocity
Darcy (superficial) seepage velocity of water through soil.
Seepage Flow Rate
Seepage flow rate through a soil cross-section using Darcy’s law.
Soil Porosity
Porosity of a soil from its void and total volumes.
Void Ratio
Void ratio of a soil from its void and solid volumes.
Engineering Strain
Engineering (nominal) strain from the change in length and original length.
Engineering Stress
Engineering (nominal) stress from the load and original cross-section area.
Modulus of Resilience
Elastic energy a material absorbs per unit volume up to yield.
Free Thermal Strain
Thermal strain produced by a temperature change in an unrestrained member.
Stress Concentration at a Notch
Peak local stress at a geometric discontinuity from the stress concentration factor.
Cyclic Stress Range
Stress range of a fatigue cycle from its maximum and minimum stresses.
Mean Stress of a Fatigue Cycle
Mean stress of a fatigue cycle from its maximum and minimum stresses.
Factor of Safety on Ultimate Strength
Factor of safety comparing ultimate tensile strength to working stress.
Young’s Modulus from a Tensile Test
Young’s modulus from the stress and strain in the elastic region of a test.
Poisson’s Ratio from Strains
Poisson’s ratio from measured lateral and axial strains.
Pythagorean Theorem (Ladder)
Length of a ladder reaching a height against a wall via the Pythagorean theorem.