Reactive Power (Q) (S, kVA, cos φ)
Calculate Reactive Power (Q) instantly with the exact formula and a worked example.
Reactive Power (Q)
S, kVA
cos φ
Q (quality)
7.2kvar
Q
7,2 kvar
More about: Reactive Power (Q) (S, kVA, cos φ)
What it calculates
The “Reactive Power (Q) (S, kVA, cos φ)” calculator computes Q (quality) in kvar from 2 parameters: s, kva, cos φ.
A standard physics formula used in educational and engineering tasks.
Example calculation
With parameters S, kVA = 12, cos φ = 0.8 the result is 7.2 kvar (Q = S·sin φ).
How to use
- Enter s, kva and cos φ — each field above is adjustable with a slider.
- Q (quality) (kvar) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Reactive Power (Q) (S, kVA, cos φ) calculated?
The Reactive Power (Q) (S, kVA, cos φ) calculator computes Q (quality) (in kvar) from s, kva, cos φ. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Reactive Power (Q) (S, kVA, cos φ) 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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