Power Converter - Convert W, kW, hp, BTU/h

Power Converter

Convert between different power units including watts, kilowatts, horsepower (mechanical, metric, electric), and BTU per hour.

All conversions happen locally in your browser. No data is sent to servers or stored remotely.

Precision: 3Format: Decimal

Round (decimal places):

Number format:

From:

To:

1.341

From Unit:

To Unit:

1 kW = 1.341 hp

⚡Quick Conversions

💡Tips

• Mechanical hp ≈ 746 W; Metric hp (PS) ≈ 735 W

• Power = Energy / Time (W = J/s)

• 1 kW = 1.341 mechanical horsepower

• Use the swap button to quickly reverse conversion

📊Conversion Table

Convert 1 kW to:

metricimperialtraditional

Metric System

Watt (W)

1,000

Megawatt (MW)

0.001

Horsepower (metric) (PS)

1.36

Gigawatt (GW)

1.000e-6

Joule per Second (J/s)

1,000

Milliwatt (mW)

1.000e+6

Kilocalorie per Hour (kcal/h)

860.4

Microwatt (µW)

1.000e+9

Calorie per Second (cal/s)

239

Nanowatt (nW)

1.000e+12

Imperial System

Horsepower (mechanical) (hp)

1.341

BTU per Hour (BTU/h)

3,412

Horsepower (electric) (hp(E))

1.34

Ton of Refrigeration (TR)

0.284

BTU per Second (BTU/s)

0.948

BTU per Minute (BTU/min)

56.87

Foot-Pound per Second (ft⋅lbf/s)

737.6

Horsepower (boiler) (hp(S))

0.102

METRIC SYSTEM(10 units)

Watt (W)

1,000

Megawatt (MW)

0.001

Horsepower (metric) (PS)

1.36

Gigawatt (GW)

1.000e-6

Joule per Second (J/s)

1,000

Milliwatt (mW)

1.000e+6

Kilocalorie per Hour (kcal/h)

860.4

Microwatt (µW)

1.000e+9

Calorie per Second (cal/s)

239

Nanowatt (nW)

1.000e+12

IMPERIAL SYSTEM(8 units)

Horsepower (mechanical) (hp)

1.341

BTU per Hour (BTU/h)

3,412

Horsepower (electric) (hp(E))

1.34

Ton of Refrigeration (TR)

0.284

BTU per Second (BTU/s)

0.948

BTU per Minute (BTU/min)

56.87

Foot-Pound per Second (ft⋅lbf/s)

737.6

Horsepower (boiler) (hp(S))

0.102

What is a Power Converter?

The Power Converter helps you convert between watts, kilowatts, horsepower, BTU/h, and 21+ other power units. Whether you're working with engines, electrical systems, HVAC equipment, or appliances, get accurate power conversions instantly.

Key Features:

21+ Units: Watts, horsepower (mechanical/metric/electric), BTU/h, ton of refrigeration
Multiple Systems: SI (watts), mechanical (hp), HVAC (BTU/h, tons)
Quick Conversions: Common power ratings at your fingertips
Privacy Friendly: All calculations in your browser

Perfect For: Engineers, electricians, HVAC technicians, automotive enthusiasts.

Frequently Asked Questions

How do I convert horsepower to watts?

To convert mechanical horsepower (hp) to watts, multiply by 745.7. For example, 100 hp = 100 × 745.7 = 74,570 watts (74.57 kW). Note: metric horsepower (PS) = 735.5 watts, electric horsepower = 746 watts.

What's the difference between horsepower types?

Mechanical horsepower (hp) = 745.7 W, metric horsepower (PS/CV) = 735.5 W, and electric horsepower = 746 W. Mechanical hp is used in the US, PS in Europe, and electric hp for motors. The differences are small but matter for precision.

How many watts are in a kilowatt?

One kilowatt (kW) equals exactly 1,000 watts (W). Similarly: 1 megawatt (MW) = 1,000,000 W, 1 gigawatt (GW) = 1,000,000,000 W. This is the standard SI metric system for power.

What is a BTU per hour in HVAC systems?

BTU/h (British Thermal Unit per hour) measures heating/cooling power. 1 BTU/h = 0.293 watts. Air conditioners are often rated in BTU/h (e.g., "12,000 BTU" actually means 12,000 BTU/h ≈ 3.5 kW or 1 ton of refrigeration).

What is a ton of refrigeration?

A ton of refrigeration is 12,000 BTU/h or approximately 3.517 kW. It represents the cooling power needed to freeze one ton (2,000 lbs) of water in 24 hours. Commonly used for rating air conditioning systems.