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
Triangle Area by Heron’s Formula
Area of a triangle from its three side lengths using Heron’s formula.
Circle Circumference
Circumference of a circle from its radius.
Sphere Volume
Volume of a sphere from its radius.
Sphere Surface Area
Surface area of a sphere from its radius.
Cone Volume
Volume of a right circular cone from its base radius and height.
Trapezoid Area
Cross-sectional area of a trapezoid, e.g. an embankment or channel.
Compound Interest
Future value of a principal under annual compound interest.
Roof Pitch Angle
Slope angle of a roof or ramp from its rise and run.
Distance Between Two Points
Straight-line distance between two points from their coordinates.
Refrigeration Cooling Capacity
Cooling capacity of a refrigeration cycle from refrigerant flow and enthalpy change.
Air Mass Flow Rate
Mass flow of air in a duct from its density and volumetric flow.
Fan Power
Shaft power of a fan from the pressure rise, flow and efficiency.
Duct Air Velocity
Air velocity in a duct from the volume flow and duct area.
Sensible Cooling Load
Sensible cooling load on an air stream from its mass flow and temperature drop.
Adiabatic Mixing of Two Air Streams
Temperature of two mixed air streams from a mass-weighted average.
Heat Exchanger Effectiveness
Effectiveness of a heat exchanger from the hot-stream temperatures.
Pressure Head
Equivalent height of fluid (head) for a given pressure.
Steam Mass from Heat Duty
Steam mass required to deliver a heat duty via its latent heat.
Thermal Diffusivity
Thermal diffusivity of a material from its conductivity, density and specific heat.
Free-Fall Distance
Distance fallen from rest under gravity in a given time.
Final Velocity (Constant Acceleration)
Final velocity of a body under constant acceleration.
Velocity from Distance (Constant Acceleration)
Final velocity after accelerating over a distance.
Braking Distance
Distance to stop a vehicle from a speed under constant deceleration.
Angular Acceleration
Angular acceleration of a rotor from its change in angular speed.