Watts to Amps Calculator
LED Lighting Supply’s free current conversion tool is ideal for electrical contractors who need to calculate wattage and voltage to amps quickly. This helps select the proper wire gauge for the electrical system, prevents potential safety hazards during installation, and ensures an optimal power factor through electric current.
Power (W)
Voltage (V)
Current
Watts to Amps Conversion Table
| Power (W) | Voltage (V) | Current (A) | Current (mA) |
|---|---|---|---|
| 1 | 1 | 1 | 1000 |
| 10 | 10 | 1 | 1000 |
| 20 | 10 | 2 | 2000 |
| 50 | 50 | 1 | 1000 |
| 100 | 100 | 1 | 1000 |
| 1000 | 100 | 10 | 10000 |
| 2000 | 200 | 10 | 10000 |
| 5000 | 500 | 10 | 10000 |
| 10000 | 1000 | 10 | 10000 |
Typical Power Factor in Lighting
| Lighting Device | Typical Power Factor |
|---|---|
| Incandescent Bulbs | 1.0 |
| Halogen Bulbs | 1.0 |
| Compact Fluorescent Lamps (CFLs) | 0.5 – 0.6 |
| Fluorescent Tubes | 0.5 – 0.9 |
| LED Lamps | 0.9 – 1.0 |
| High-Pressure Sodium (HPS) | 0.9 – 1.0 |
| Metal Halide | 0.8 – 1.0 |
| Induction Lamps | 0.9 – 1.0 |
| Neon Signs | 0.6 – 0.7 |
| HID (High Intensity Discharge) | 0.8 – 0.9 |
Need a more thorough analysis? Get a custom lighting plan with product support
How to use LED Lighting Supply's Free Watts to Amps Conversion Calculator:
Determine the power in Watts. A watt is a unit of electrical power that measures the rate of energy transferred over time.
Watts (W) Calculation:
To calculate Watts (W), multiply the Amperes (A) by the Volts (V).
Determine the Voltage. This is also referred to as electrical potential difference.
Voltage (V):
Volts measure the pressure that pushes electricity. Neutral voltage is typically zero volts while a higher voltage maximizes the capacity of electricity that can be pushed. Excessive voltage can damage the electric circuit or prevent it from operating properly.
Click calculate to determine the current in ampere (A) and milliampere (mA)
Watts to Amps (A) Conversion Formula:
Amps (A) is a measurement of electric charge or the strength of an electric current. To calculate amps, use our amps calculator or divide the Watts (W) by the Volts (V).
- Amps = Watts (W) / Volts (V)
Basic Equations:
Power Conversion
Use this formula to calculate Watts from Voltage and Current:
- Power (W) = Voltage (V) × Current (A)
Amps Current Conversion
Use this formula to calculate current from Watts and Volts:
- Current (A) = Power (W) ÷ Voltage (V)
Milliamperes Conversion Formula
Milliamperes current s a measurement of electric charge or the strength of small electric currents. It’s equal to 1 ampere (A) divided by 1,000. Use this formula to convert current from Power and Voltage:
- Current (mA) = Current (A) × 1000