Inductive Reactance
Calculator
Results
- Reactance (Ω)
- 31.415926
- Current (A)
- 7.321127
- Reactive power (VAr)
- 1,683.859297
Electrical results
| Reactance (Ω) | 31.415926 |
| Current (A) | 7.321127 |
| Reactive power (VAr) | 1,683.859297 |
formula-map diagram
- Reactance (Ω)
- 31.415926
- Current (A)
- 7.321127
- Reactive power (VAr)
- 1,683.859297
Electrical relationship
Formula
XL = 2π × f × L= 31.415926535898
Note
This is a simplified model: it applies the textbook relationship to the numbers you entered and assumes ideal components, steady-state sinusoidal conditions, balanced loads and copper resistivity of 0.0172 Ω·mm²/m at 20 °C. It ignores component tolerances, temperature drift, skin effect, harmonics, inrush, transformer and battery losses, and it is not a substitute for the wiring code that applies where you are. Have any installation sized and verified by a licensed electrician or engineer.
More in Electrical engineering
See all →Frequently asked questions
What is inductive reactance and what's the formula?+
Inductive reactance XL = 2*pi*f*L measures how much an inductor opposes AC current, in ohms, and it grows directly with both frequency and inductance.
Why does reactance increase with frequency for an inductor, but decrease for a capacitor?+
An inductor resists changes in current, and higher frequency means current is changing direction faster, so the inductor pushes back harder — the opposite of a capacitor, which has less time to resist voltage buildup at higher frequencies. This opposite behavior is why LC circuits can resonate.
What is the reactance of an inductor at DC?+
At f = 0, XL = 0, meaning an ideal inductor offers no opposition to steady DC current — only its wire resistance limits current in that case. Reactance only appears once the current is changing.
Does inductive reactance dissipate power like a resistor?+
No, an ideal inductor's reactance stores energy in a magnetic field and releases it back to the circuit rather than converting it to heat. Real inductors have some resistance in their windings that does dissipate a small amount of power.
Why does inductive reactance matter for motor and transformer design?+
Since XL scales with frequency, the same inductor behaves very differently at 50/60Hz mains frequency versus a high-frequency switching supply, which is why inductor sizing is central to transformer and choke design at a given operating frequency.