Unit ConverterInstant Bidirectional Conversion
Watts to Amps Converter (W to A)
Convert electrical power in Watts (W) to electric current in Amperes (A) for DC, 1-Phase AC, and 3-Phase AC.
Convert Watts to Amperes
W
V
0.1 - 1.0
Conversion Result
Current Draw in Amperes (A)
15 A
1800 Watts @ 120 Volts (1-Phase AC)
Apparent Power (VA)
1,800 VA
Total volt-amperes capacity
Step-by-Step Engineering Calculation
- 1Current:
Conversion Formula & Relationship
I_DC = P / V | I_1φ = P / (V × PF) | I_3φ = P / (√3 × V × PF)
Calculates current draw based on applied wattage, voltage level, and power factor.
Standard Conversion Example
Input: 1800 Watts at 120 Volts AC (PF = 1.0)
Result: 15.00 Amps
1800 W / (120 V × 1.0) = 15.00 A (Maximum capacity of standard 15A branch circuit).
1800 Watts at 120 Volts AC (PF = 1.0) = 15.00 Amps
Quick Reference Conversion Table
| Watts (W) | Amperes (A) | Common Application / Context |
|---|---|---|
| 100 W (120V DC/AC) | 0.83 A | Small LED TV / laptop |
| 500 W (120V) | 4.17 A | Gaming PC / blender |
| 1000 W (120V) | 8.33 A | Microwave oven |
| 1500 W (120V) | 12.50 A | Space heater / toaster |
| 1800 W (120V) | 15.00 A | 15A circuit limit |
| 2400 W (240V) | 10.00 A | Electric oven / dryer |
| 4800 W (240V) | 20.00 A | Water heater |
| 7200 W (240V) | 30.00 A | Central AC / Level 2 EVSE |
Frequently Asked Questions
How many Amps is 1000 Watts at 120 Volts?
1000 Watts at 120 Volts equals 8.33 Amps for a purely resistive load (PF = 1.0).