Electricity Calculator Group
Alternating Current Calculators
Analyze sinusoidal voltage, impedance, phase, resonance, and alternating-current power.
Choose the electrical result you need
Use RMS quantities unless a field explicitly asks for peak amplitude.
Open the calculator whose primary output matches the decision at hand. Each worksheet shows its formula, loaded example, input definitions, limitations, and related calculations.
Alternating Current worksheets
Frequency PeriodConvert frequency into cycle period.Angular FrequencyConvert hertz into angular frequency.Peak RMS VoltageConvert sinusoidal peak voltage to RMS.Peak-to-Peak VoltageConvert peak-to-peak amplitude.Phase Shift TimeConvert a time offset into phase angle.Inductive ReactanceCalculate ideal inductive reactance.Capacitive ReactanceCalculate ideal capacitive reactance.Series RL ImpedanceFind series resistance-inductance impedance magnitude.Series RC ImpedanceFind series resistance-capacitance impedance magnitude.Series RLC ImpedanceCalculate series RLC impedance.Parallel RLC ImpedanceCalculate ideal parallel RLC impedance.Resonant FrequencyFind ideal LC resonance.Resonance BandwidthEstimate half-power bandwidth from quality factor.Real Reactive Apparent PowerSeparate AC power components.Single-Phase PowerCalculate single-phase real power.Three-Phase PowerCalculate balanced three-phase power.Line Phase VoltageConvert line voltage to phase voltage.Power FactorCalculate power factor from real and apparent power.Power Factor CorrectionEstimate correction reactive power.Total Harmonic DistortionCalculate THD from combined harmonic RMS.
Use ratings and measurements deliberately
Keep voltage type, current path, frequency, phase arrangement, operating time, and temperature with the result. A value taken from a nameplate may describe a different condition from a meter reading.
These calculators support arithmetic and comparison. They do not replace electrical codes, equipment instructions, qualified design, safe isolation, or test procedures.