CalcAdda 107+ Tools

⚡ Power Unit Converter

Convert between Watts, Kilowatts, Horsepower, BTU/hour, Tons of Refrigeration, and more. Perfect for engineering, HVAC, and automotive calculations.

Watts to HP kW to BTU TR to kW 10+ Units

⚡ Converted Power

0.001 kW

1 W = 0.001 kW

💡 1 watt = 0.001 kW = 0.00134 HP

What can this power do?

📚 Power Conversion Facts

  • 1 Kilowatt (kW) =1000 Watts
  • 1 Horsepower (HP) =745.7 Watts
  • 1 Metric HP =735.5 Watts
  • 1 Ton Refrigeration =3.517 kW
  • 1 BTU/hour =0.293 Watts
  • 1 Megawatt (MW) =1000 kW

📊 Common Power Ratings

💡 LED Bulb5-15 W
📱 Phone Charger10-20 W
💻 Laptop50-100 W
❄️ Window AC1-2 kW
🚗 Car Engine100-300 HP
🏭 Power Plant500-1000 MW

❄️ AC Capacity Guide

1 Ton AC =3.5 kW | 12,000 BTU/h
1.5 Ton AC =5.3 kW | 18,000 BTU/h
2 Ton AC =7.0 kW | 24,000 BTU/h

💡 Room size guide: 1 Ton for 100-120 sq ft

💡 Quick Trick: To convert kW to HP, multiply by 1.34. For HP to kW, divide by 1.34. 1 Ton AC ≈ 1.5 kW of cooling power.

📊 Why Use a Power Converter?

Power conversion is essential in electrical engineering, automotive, HVAC, and everyday life. Whether you're comparing car engines, sizing an air conditioner, calculating electricity usage, or working with industrial equipment, accurate power conversion helps you make informed decisions.

🔧 Engineering

Motor ratings, generator sizing, mechanical power in HP and kW.

❄️ HVAC

AC capacity in Tons, BTU/h, and kW for cooling and heating.

🚗 Automotive

Engine power in HP, kW, and comparisons between vehicles.

❓ Frequently Asked Questions

What's the difference between mechanical and metric horsepower?

Mechanical HP (used in US) = 745.7 watts. Metric HP (used in Europe) = 735.5 watts. The difference comes from historical definitions. Most modern applications use mechanical HP.

How do I calculate my AC power consumption?

1 Ton AC typically consumes 1.2-1.5 kW of electrical power. Check your AC's label for exact wattage. Multiply kW by hours used to get kWh for your electricity bill.

What is a ton of refrigeration?

1 ton of refrigeration (TR) is the cooling capacity needed to freeze 1 ton of water at 0°C in 24 hours. It equals 12,000 BTU/h or 3.517 kW. It's the standard unit for AC and refrigeration.

How many watts does my appliance use?

Check the label on your appliance - it shows volts and amps. Watts = Volts × Amps. For example, 120V × 5A = 600W. Use our converter to compare with HP or BTU ratings.

⚠️ Disclaimer: All conversions are based on standard international definitions. Actual appliance power consumption may vary by efficiency and operating conditions.