Calculator · Electrical Engineering
Power Factor & Power Triangle Calculator
P, Q and S form a right triangle: S² = P² + Q² and PF = P / S. The sign of Q is never guessed — without a signed Q or a lagging/leading choice the result reports |Q| and an undetermined nature.
Inputs
Results
Real power P
1.84 kW
Reactive power Q
± 1.38 kvar
Apparent power S
2.3 kVA
|PF| · φ
0.8 · 36.87°
| Nature | Undetermined — supply a signed Q or lagging/leading |
|---|
Explore in the Lab
Inspect this triangle in the Power & Three-Phase Lab
Carries exactly the quantities supplied here.
Technical reference
S² = P² + Q²
PF = P / S
φ = atan2(|Q|, P)
- P
- real power (≥ 0)[W]
- Q
- reactive power (signed)[var]
- S
- apparent power (≥ 0)[VA]
- PF
- power factor magnitude, 0 ≤ PF ≤ 1
Reference: P = 1840 W, S = 2300 VA → |Q| = 1380 var, PF = 0.8, φ ≈ 36.87°.
Overdetermined or inconsistent sets are refused, never silently reconciled.