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eng.total-harmonic-distortion Calculator
Calculates Total Harmonic Distortion (THD) from the amplitude of individual harmonics relative to the fundamental frequency component. THD = √(V₂² + V₃² + V₄² + ...) / V₁ — IEEE 519 limits THD to 5% at the point of common coupling for most installations.
Inputs
V1 Rms
Reference formula or conversion factor shown for context.
V3 Rms
Reference formula or conversion factor shown for context.
V5 Rms
Reference formula or conversion factor shown for context.
V7 Rms
Reference formula or conversion factor shown for context.
V9 Rms
Reference formula or conversion factor shown for context.
Results
THD (%)
Reference formula or conversion factor shown for context.
total RMS voltage (V)
Electric potential difference between the two terminals (V). In AC systems, quoted as RMS — 230 V mains has a peak of ~325 V.
5th harmonic % of fundamental
Sample size or count used in the calculation.
THD = √(ΣVₙ²) / V₁
Reference formula or conversion factor shown for context.
IEEE 519 limits
Reference formula or conversion factor shown for context.
power factor distortion
A dimensionless multiplier applied in the calculation.