Calculate the electric field strength at a point due to a point charge or from voltage and distance. The electric field is a vector pointing away from positive charges.
Enter your values below
Point charge creating the field. Leave blank if using force/charge.
Distance from the source charge to the point of interest.
Force on test charge. Use E = F/q if charge is provided.
Small test charge used to measure the field.
How this calculator works
Electric field E is the force F per unit charge q. For a point charge Q, the field at distance r is E = kQ/r^2. The field points radially outward from positive charges.
Common questions about this calculator
These calculators are for educational and informational purposes only. While we strive for accuracy, results should be verified for critical applications. Always consult authoritative sources for engineering or scientific work.
