Volts to Amps Calculator | PES Supply
Volts to Amps Calculator
Convert voltage to amperage instantly. Enter your voltage and wattage to calculate amps for any electrical system.
Formula
Volts to Amps Conversion Table
Common conversions at 240W power:
| Volts (V) | Power (W) | Amps (A) |
|---|---|---|
| 12V | 240W | 20.00 A |
| 24V | 240W | 10.00 A |
| 48V | 240W | 5.00 A |
| 120V | 240W | 2.00 A |
| 240V | 240W | 1.00 A |
| 480V | 240W | 0.50 A |
When to Use This Calculator
- Sizing solar panel wiring and fuses for your system
- Determining breaker sizes for generator connections
- Calculating current draw for battery bank charging
- Sizing transfer switches for standby generators
- Planning RV and off-grid solar installations
How do I convert volts to amps?
To convert volts to amps, divide the power in watts by the voltage: Amps = Watts / Volts. For example, at 120V and 240W, the current is 240/120 = 2 amps.
Why do I need wattage to convert volts to amps?
Voltage alone doesn't determine current. You need to know the power (watts) being consumed. Ohm's Law states that current equals power divided by voltage.
What's the difference between volts, amps, and watts?
Volts (V) measure electrical pressure, amps (A) measure current flow, and watts (W) measure total power. Watts = Volts x Amps. Think of it like water: volts are water pressure, amps are flow rate, and watts are total water delivered.