Volts to Amps Calculator
Calculate current (Amps) from voltage (Volts) using either Watts or Ohms.
How to Convert Volts to Amps
To convert volts to amps, you need to know the resistance (in ohms) or the power (in watts) of the circuit, as volts (V), amps (I), and resistance (R) or power (P) are related through Ohm’s Law and the power formula.
Formula
Quick Trick: Use Ohm’s Law: Voltage = Current × Resistance!
Power Method Calculation
Calculate voltage using the relationship between power and current:
Commonly used with power supplies and electrical appliances
Ohm’s Law Calculation
Use Ohm’s Law for circuits with known resistance:
Applies to both DC and AC circuits (using RMS values)
Example
Imagine you have a voltage measurement:
- We measured: 10 Volts with a resistance of 5 Ohms
Here’s how we figure it out:
1. Take our formula: A = V / R
2. Put in 10 Volts and 5 Ohms
3. A = 10 / 5
Answer: 2 A
What Do These Terms Really Mean?
Amperes (A) – The Measure of Current
An ampere (A) is a unit of electric current:
- Represents the flow of electric charge.
- Essential for understanding circuit behavior.
Volt (V) – The Basic Unit of Voltage
Volts are a standard unit of electrical potential. Here’s what you need to know:
- Used to measure electrical potential difference.
- 1 Volt is the potential difference that will move 1 Ampere of current against 1 Ohm of resistance.
