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Current calculator online calculation tool

The resistance of the conductor is usually represented by the letter R. The unit of resistance is ohm, referred to as Europe, and the symbol is Ω (Greek letter, transliterated into pinyin read as ōu mī ga ), 1 Ω = 1 V / A. Larger units have kilo ohms (kΩ) and megohms (MΩ) (mega = millions, or 1 million).

The basic unit of current is ampere, and 1 amp is defined as: two infinitely long parallel straight conductors separated by 1 m in vacuum, with equal constant current, when the force per metre of conductor is \(2×10^-7N\), the current on each wire is 1 ampere.

The main unit of voltage in the International System of Units is volts (V), referred to as volts, denoted by the symbol V. [1] 1 volt is equal to 1 joule of work per volt of charge on the voltmeter, ie 1 V = 1 J/C. Strong voltages are commonly used in kilovolts (KV), and weak voltage units can be in millivolts (mV) microvolts (μv).

\(current (A)= \frac {V}{R} \)

Note: Resistance refers to pure DC resistance. This calculator can not calculate the inductive load resistance of the motor, transformer and other results.


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