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.
35 examples found
Cable Size Calculator
Voltage Drop Calculator
Calculate the voltage drop in a wire
Ohm's Law Resistor Power
Current and power dissipation in a resistor from Ohm’s law.
RC Circuit Time Constant
Time constant and approximate settling time of a series resistor–capacitor circuit.
Three-Phase Real Power
Real (active) power delivered by a balanced three-phase system from line voltage, current and power factor.
Capacitor Energy Storage
Energy stored in a charged capacitor from its capacitance and voltage.
Resistors in Series
Equivalent resistance of resistors connected in series.
Resistors in Parallel
Equivalent resistance of two resistors connected in parallel.
Voltage Divider
Output voltage of a two-resistor voltage divider.
Capacitive Reactance
Reactance of a capacitor at a given frequency.
Inductive Reactance
Reactance of an inductor at a given frequency.
LC Resonant Frequency
Natural resonant frequency of an inductor–capacitor circuit.
Wire Resistance
DC resistance of a length of conductor from its resistivity and cross-section.
DC Electrical Power
Power delivered to a DC load from its voltage and current.
Transformer Turns Ratio
Secondary voltage of an ideal transformer from its turns ratio.
Coulomb’s Law Force
Electrostatic force between two point charges.
Parallel-Plate Capacitance
Capacitance of a parallel-plate capacitor from its geometry.
RMS Voltage of a Sine Wave
Root-mean-square voltage of a sinusoid from its peak value.
Power Factor
Power factor of an AC load from its real and apparent power.
Energy Stored in an Inductor
Magnetic energy stored in an inductor carrying a current.
Battery Run Time
Run time of a battery from its capacity and the load current.
Three-Phase Line Current
Line current of a balanced three-phase load from its power, voltage and power factor.
Electrical Energy Consumption
Energy used by a load running at a given power for a period.
Motor Torque from Power
Output torque of a motor from its mechanical power and speed.