Watt Converter
Convert between watts and other power units with precision
Power Unit Converter
Conversion Result
0
Kilowatt (kW)
Nano-scale
Power Scale
Conversion Formula: 0 W × 1 ÷ 1000 = 0 kW
Example Conversions
Household Power
1500 W = 1.5 kW (electric heater)
100 W = 0.1 kW (bright light bulb)
750 W = 1.006 hp (microwave oven)
Vehicle Power
1. 200 hp × 745.7 W/hp = 149,140 W (car engine)
2. 5 hp × 745.7 W/hp = 3,729 W (lawnmower)
3. 0.5 hp × 745.7 W/hp = 373 W (garbage disposal)
Power Scale Guide
Nano-scale< 1 nW
Micro-scale1 nW - 1 µW
Milli-scale1 µW - 1 mW
Sub-watt1 mW - 1 W
Watt-scale1 W - 1 kW
Kilowatt-scale1 kW - 1 MW
Megawatt-scale1 MW - 1 GW
Gigawatt-scale> 1 GW
Common Power Units
Watt (W)1 W
Kilowatt (kW)1,000 W
Horsepower (hp)745.7 W
BTU/hour0.293 W
Calorie/second4.184 W
Megawatt (MW)1,000,000 W
Power Facts
⚡
1 Watt = 1 Joule per second
⚡
Average household uses 1-3 kW
⚡
LED bulb: 5-15 W, Incandescent: 60-100 W
⚡
Nuclear power plant: ~1000 MW
Understanding Power Units
What is a Watt?
A watt (W) is the International System of Units (SI) unit for power. One watt equals one joule per second (1 W = 1 J/s), representing the rate of energy transfer or energy consumption per unit of time.
SI Power Prefixes
- •Kilowatt (kW): 1,000 watts - household power
- •Megawatt (MW): 1,000,000 watts - industrial power
- •Gigawatt (GW): 1,000,000,000 watts - power plants
- •Milliwatt (mW): 0.001 watts - small electronics
Other Power Units
Horsepower: 1 hp = 745.7 W
BTU/hour: 1 BTU/h = 0.293 W
Calorie/second: 1 cal/s = 4.184 W
Conversion Process
- Step 1: Convert input to watts using conversion factor
- Step 2: Convert watts to desired output unit
- Example: 2 hp = 2 × 745.7 = 1,491.4 W
- Then: 1,491.4 W ÷ 1,000 = 1.491 kW
Power vs Energy
- •Power (Watts): Rate of energy transfer
- •Energy (Watt-hours): Total energy consumed
- •Example: 100 W bulb × 10 hours = 1 kWh energy
- •Formula: Energy = Power × Time
Real-World Applications
- •Electronics: Phone charger (5-20 W)
- •Appliances: Refrigerator (100-200 W)
- •Vehicles: Car engine (75-400 hp)
- •Industry: Electric motor (1-1000 kW)