Amp Volt Watt Calculator
Please provide any 2 values and click “Calculate” to get the other values in the amp, volt, and watt equations.
How to Convert Amps, Volts, and Watts
Amps (amperes), volts, and watts are related units in electricity, and you can convert between them using Ohm’s Law and the power formula.
Power-Current-Voltage Relationship
Quick Trick: To find power in watts, multiply current in amps by voltage in volts!
The Relationship Between Amps, Volts, and Watts
The relationship between amps (current), volts (voltage), and watts (power) is given by the formula:
Watts (P) = Volts (V) × Amps (I)
Where:
- P is power in watts (W)
- V is voltage in volts (V)
- I is current in amperes (A)
Rearranged Formulas:
To calculate Amps:
Amps (I) = Watts (P) / Volts (V)
To calculate Volts:
Volts (V) = Watts (P) / Amps (I)
This formula applies to direct current (DC) circuits or resistive loads in alternating current (AC) circuits. For AC circuits with reactive components, the formula needs to account for the power factor (PF):
Watts (P) = Volts (V) × Amps (I) × PF
Where the power factor is a number between 0 and 1 that accounts for phase differences between voltage and current.
Let’s Solve One Together
Imagine you have the following measurements:
- Current: 2 A
- Voltage: 5 V
Here’s how we figure it out:
1. Take our formula: P (W) = I (A) × V (V)
2. Put in I = 2 A and V = 5 V
3. Calculate P = 2 × 5
4. P = 10 W
Answer: 10 W
Definitions of Key Terms
Ampere (A)
Amperes measure the flow of electric charge. One ampere is the flow of one coulomb of charge per second.
Volt (V)
Volts measure electric potential. One volt is the potential difference that will move one ampere of current against one ohm of resistance.
Watt (W)
Watts measure the rate of energy transfer. One watt is equal to one joule per second.
