Electric Potential Calculator — V = kq/r

Electric potential is the potential energy per unit charge — what we casually call 'voltage'. It falls off as 1/r from a point charge.

$V = k\frac{q}{r}$

Solve for

Charge (q)

Unit

Distance (r)

Unit

Result unit

How to interpret the result

A 1 µC charge produces about 9,000 V at 1 m — which is why static shocks sting: thousands of volts, but almost no charge behind them.