The formula unit of voltage is **volts (V)**.
Voltage, also known as electric potential difference, is the measure of the energy per unit charge required to move a charge between two points in an electric field.
The formula for voltage (V) is:
$$
V = \frac{W}{Q}
$$
Where:
* $V$ is the voltage (in volts),
* $W$ is the work or energy (in joules),
* $Q$ is the charge (in coulombs).
The unit of voltage is derived from the units of work (joules) and charge (coulombs), and thus, **1 volt = 1 joule per coulomb**.