Electric Resistance Converter

The Electric Resistance Converter converts between all standard units of electrical resistance, from microohms to gigaohms. Resistance, measured in ohms (Ω), quantifies how strongly a material opposes the flow of electric current.

Named after Georg Simon Ohm, the ohm is defined as the resistance between two points of a conductor when a potential difference of one volt produces a current of one ampere (V/A). Resistance is a fundamental property in circuit design, power distribution, and electronic component specification.

Resistance values in practical applications span many orders of magnitude: microohms (µΩ) for bus bar connections and wire joints, milliohms (mΩ) for current sense resistors and PCB traces, ohms (Ω) for standard resistors and heating elements, kilohms (kΩ) for signal conditioning and voltage dividers, megohms (MΩ) for insulation resistance and high-impedance circuits, and gigaohms (GΩ) for insulation testing and electrometer circuits.

This converter also supports the abohm, a CGS electromagnetic unit where 1 abohm = 10⁻⁹ ohms (1 nanoohm). Understanding resistance conversion is essential for proper resistor selection, insulation testing, grounding system design, and circuit analysis.

The color-coded bands on standard resistors use a logarithmic scale spanning from 0.1 Ω to 10 MΩ, with tolerance bands from ±0.1% to ±20%. Precision applications may require resistors specified to six or more significant digits.