Electric Field Strength Calculator
⚡ Electricity & magnetism. Use the Electric field strength formula to find field strength, voltage between the plates, plate separation: pick the value you want, type the others, and the answer updates as you go.
V/d is for the even field between two parallel plates.
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Field strength | V/m |
| Voltage between the plates | V |
| Plate separation | m |
Worked example
Find the field strength when Voltage between the plates = 100 V, Plate separation = 0.02 m.
Using E = F/Q = V/d: Field strength = 5000 V/m.
Frequently asked questions
What is the formula for Electric field strength?
E = F/Q = V/d. V/d is for the even field between two parallel plates.
What do the letters stand for, and what units are used?
Field strength in V/m, Voltage between the plates in V, Plate separation in m.
How do you calculate field strength?
Put the values into E = F/Q = V/d. For example, with Voltage between the plates = 100 V, Plate separation = 0.02 m, field strength = 5000 V/m.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (field strength, voltage between the plates, plate separation) and fill in the others: it rearranges the formula for you.
