Apparent Power (S)

Calculate Apparent Power (S) instantly with the exact formula and a worked example.

Apparent Power (S)

P, kW
Q, kvar
S (apparent power)
12.8062kVA
S = √(P² + Q²)Calculate Apparent Power (S) instantly with the exact formula and a worked example.
S
12,81 kVA
cos φ
0,781

More about: Apparent Power (S)

What it calculates

The “Apparent Power (S)” calculator computes S (apparent power) in kVA from 2 parameters: p, kw, q, kvar.

A standard physics formula used in educational and engineering tasks.

Example calculation

With parameters P, kW = 10, Q, kvar = 8 the result is 12.81 kVA (S = √(P² + Q²)).

How to use

  1. Enter p, kw and q, kvar — each field above is adjustable with a slider.
  2. S (apparent power) (kVA) is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is Apparent Power (S) calculated?
The Apparent Power (S) calculator computes S (apparent power) (in kVA) from p, kw, q, kvar. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Apparent Power (S) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.

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