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Q_C needed

Calculate Q_C needed instantly with the exact formula and a worked example. Free online calculator — no signup.

Q_C needed

P, kW
cos φ₁
cos φ₂ target
U, V
f, Hz
Q_C needed
6.9152kvar
Q_C = P·(tan φ₁ − tan φ₂)Calculate Q_C needed instantly with the exact formula and a worked example. Free online calculator — no signup.
Q_C
6,92 kvar
C
137,6 µF

More about: Q_C needed

What it calculates

The “Q_C needed” calculator computes Q_C needed in kvar from 5 parameters: p, kw, cos φ₁, cos φ₂ target, u, v, f, hz.

A standard physics formula used in educational and engineering tasks.

Example calculation

With parameters P, kW = 10, cos φ₁ = 0.7, cos φ₂ target = 0.95, U, V = 400, f, Hz = 50 the result is 6.92 kvar (Q_C = P·(tan φ₁ − tan φ₂)).

How to use

  1. Enter the parameter values — every field above is adjustable with a slider.
  2. The result and related metrics are calculated automatically as you type.
  3. Use the additional metrics shown (if any) where needed.
  4. Copy the result or bookmark the page.

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