Electric Dipole Field Calculator
Compute axial and equatorial E-field of a dipole p = q·d.
Input Data
Charge C
C
Separation M
m
Distance M
m
Results
p = q·d.
0.000000001C·m
E_ax = 2kp/r³.
17.975104V/m
E_eq = kp/r³.
8.987552V/m
k = 1/(4πε₀).
8,987,551,787.3682N·m²/C²
At a glance:E_axial = 2kp/r³; E_eq = kp/r³ (far field, r≫d). Complements electric-field and electric-potential.
Formula
E_axial = 2k·p/r³.
E_eq = k·p/r³.
$$p = qd, \quad E_{axis} = \frac{2kp}{r^3}$$$$E_{equator} = \frac{kp}{r^3}, \quad k = \frac{1}{4\pi\varepsilon_0}$$How to Use
- Enter q, d and r.
- The tool returns axial/equatorial fields.
Case Studies
q=1e-9, d=0.02, r=0.1
p=2e-11, E_ax≈36 V/m.
FAQ
On axis vs equator?
Axial field is twice the equatorial field and opposite direction.
Related Tools
References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.