• Ideas & Concept

  • Ohm's Law Calculator

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    Enter any 2 values then click "Calculate". The unknown values will be calculated.

    Voltage millivolts volts kilovolts megavolts
    Current milliamps amps kiloamps megaamps
    Resistance milliohms ohms kilohms megaohms
    Power milliwatts watts kilowatts megawatts

    Ohm's Law defines the relationship between power, voltage, current, and resistance. The various possible formulas for Ohm's law are as follows.

    P = power in watts
    E = voltage in volts
    I = current in amps
    R = resistance in ohms

    P = E2/R
    P = I2 * R
    P = E * I

    E = sqrt(P * R)
    E = P/I
    E = I * R

    I = E/R
    I = P/E
    I = sqrt(P/R)

    R = E/I
    R = E2/P
    R = P/I2

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