# Conductance and Siemens

**Conductance** ($G$) is the ability of a material to carry electricity, is measured in Siemens ($S$), and defined indirectly by Ohm's Law as current ($I$) over [voltage](voltage.md, or) $G = I/V$. The inverse of conductance is resistance.

**Conductors** are materials that carry electricity well, and thus have a high conductance (and thus a low resistance) value.

## Deeper Knowledge on Conductance and Siemens

### Ohm's Law

A formula for determining voltage, current, and resistance

### Resistance and Ohms

Opposition to current, measured in ohms

## Broader Topics Related to Conductance and Siemens

### Current and Amperes

The flow of electricity, measured in amps

### Electricity

Energy that results from charged particles

### Resistance and Ohms

Opposition to current, measured in ohms

### International System of Units (SI)

Formal terms and definitions of the metric system

### Voltage and Volts

Electrical potential energy, measured in volts