Unit ConverterInstant Bidirectional Conversion
Volts to Watts Converter (V to W)
Calculate power in Watts from voltage when either current (Amps) or resistance (Ohms) is known.
Convert Volts to Watts
V
A
Conversion Result
Electrical Power in Watts (W)
1,200 W
1.200 Kilowatts (kW)
Step-by-Step Engineering Calculation
- 1Power:
Conversion Formula & Relationship
P = V × I | P = V² / R
Direct conversion from potential difference to power using Ohm's Law and Joule's Law relationships.
Standard Conversion Example
Input: 240 Volts across a 16 Ω heating element
Result: 3,600 Watts (3.60 kW)
P = (240 V)² / 16 Ω = 57,600 / 16 = 3,600 W.
240 Volts across a 16 Ω heating element = 3,600 Watts (3.60 kW)
Quick Reference Conversion Table
| Volts (V) | Watts (W) | Common Application / Context |
|---|---|---|
| 12 V (10 A) | 120 W | 12V auto / solar |
| 24 V (10 A) | 240 W | 24V battery bank |
| 48 V (10 A) | 480 W | 48V telecoms / solar |
| 120 V (10 A) | 1,200 W | US household standard |
| 230 V (10 A) | 2,300 W | EU / international standard |
| 240 V (30 A) | 7,200 W | US high-power appliance |
| 480 V (20 A 3-Phase) | 16,627 W | Industrial 3-Phase |
Frequently Asked Questions
Can I convert Volts directly to Watts without another variable?
No. Voltage is potential difference (energy per unit charge). To calculate power in Watts, you must know either the current flowing (Amperes) or the circuit resistance (Ohms).