Amps to Volts calculator

Amps to volts calculator

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How to Calculate

Select the calculation ( Watts or Ohms), Enter the electric current in amperes (A), Enter the power value in watts (W), or Enter the resistor value in ohms ( Ω ) then click on " Calculate " button.

Calculate Box

amps to volts with watts amps to volts with ohms

A

W

Ω

V

To convert amps (A) to volts (V) with watts or ohms, you need to know the electric current rating and resistance value. Use these formulas for quick conversions from amps to volts with watts or ohms. Here are the formulas:

Conversion General Formulas

If you know the power (P) and the current (I), you can find the voltage (V) by rearranging the Power Law: \[ \text{V} = \frac{\text{P}}{\text{I}} \]

Example Calculation :- if a device uses 400 watts of power and the current is 33.33 amperes, the voltage is:

\[ \text{V} = \frac{\text{400}{ W}}{\text{33.33}{ A}} = \text{12}\text{ V} \]

Therefore, the voltage value in this calculation is 12 V.

If resistance and current are known, voltage can be calculated using:

\[ \text{V} = \text{I}\times \text{R} \]

Example Calculation :- if a current of 0.2 amperes flows through a 50 ohms resistor, the voltage across the resistor is:

\[ \text{V} = \text{0.2} \text{ A} \times \text{50} \text{ Ω} = \text{10} \text{ V} \]

Therefore, the voltage value in this calculation is 10 V.

Unit of Measurement

International System of Units - \( P \): is the active power in watts (W)
- \( V \): is the voltage in volts (V)
- \( I \): is the current in amperes (A)
- \( R \): is the resistance in ohms (Ω)

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