kW to BTU/hr Converter

Convert kilowatts to British thermal units per hour

Kilowatts (kW)

BTU per Hour (BTU/hr)

3412.14 BTU/hr

Quick Conversions:

Conversion Formula

The conversion from kilowatts to BTU per hour follows this formula:

P(BTU/hr) = P(kW) × 3412.142

Where P(BTU/hr) represents power in British thermal units per hour and P(kW) represents power in kilowatts.

Conversion Examples

Example 1: Convert 5 kW to BTU/hr

Calculation: 5 kW × 3412.142 = 17,060.71 BTU/hr

Result: 5 kilowatts equals 17,060.71 BTU per hour

Example 2: Convert 12 kW to BTU/hr

Calculation: 12 kW × 3412.142 = 40,945.70 BTU/hr

Result: 12 kilowatts equals 40,945.70 BTU per hour

Example 3: Convert 0.5 kW to BTU/hr

Calculation: 0.5 kW × 3412.142 = 1,706.07 BTU/hr

Result: 0.5 kilowatts equals 1,706.07 BTU per hour

kW to BTU/hr Conversion Table

Kilowatts (kW)	BTU per Hour (BTU/hr)
0.1 kW	341.21 BTU/hr
0.5 kW	1,706.07 BTU/hr
1 kW	3,412.14 BTU/hr
2 kW	6,824.28 BTU/hr
3 kW	10,236.42 BTU/hr
5 kW	17,060.71 BTU/hr
7.5 kW	25,591.07 BTU/hr
10 kW	34,121.42 BTU/hr
12 kW	40,945.70 BTU/hr
15 kW	51,182.13 BTU/hr
20 kW	68,242.84 BTU/hr
25 kW	85,303.55 BTU/hr
30 kW	102,364.26 BTU/hr
50 kW	170,607.10 BTU/hr
100 kW	341,214.20 BTU/hr

Common Applications

HVAC Systems

Air conditioning and heating systems often use both kW and BTU/hr ratings. A typical home air conditioner ranges from 2-5 kW (6,824 to 17,060 BTU/hr).

Industrial Equipment

Manufacturing facilities measure equipment power output in kilowatts while cooling requirements are specified in BTU per hour.

Heat Pumps

Heat pump efficiency is measured using both units. Converting between them helps compare different models and their heating capacity.

Power Stations

Portable power stations specify output in kW. Converting to BTU/hr helps determine their capability for heating or cooling applications.

Related Power Conversions

From	To	Conversion Factor
kW	BTU/hr	× 3412.142
kW	Watt (W)	× 1000
kW	Horsepower (HP)	× 1.341
kW	Joules/second (J/s)	× 1000
kW	Calories/second	× 238.846
BTU/hr	kW	× 0.000293
BTU/hr	Watt (W)	× 0.293

About Kilowatt (kW)

The kilowatt is a unit of power in the International System of Units (SI) equal to 1,000 watts. Named after Scottish inventor James Watt, the kilowatt measures the rate of energy transfer or conversion. One kilowatt equals one thousand joules per second. This unit is commonly used worldwide to express the output power of engines, electric motors, and household appliances. Electricity consumption is typically measured in kilowatt-hours (kWh), representing the energy used when a power of one kilowatt is sustained for one hour.

About BTU per Hour (BTU/hr)

The British thermal unit per hour is a unit of power used primarily in the United States. One BTU/hr represents the rate at which energy is transferred when one BTU of energy is moved in one hour. The British thermal unit itself is defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. While not as widely adopted as the watt in international contexts, BTU/hr remains prevalent in North American heating, ventilation, and air conditioning (HVAC) specifications. The conversion factor between kW and BTU/hr is approximately 3412.142, meaning one kilowatt equals 3412.142 BTU per hour.

Frequently Asked Questions

How do you convert kW to BTU/hr?

To convert kilowatts to BTU per hour, multiply the power value in kW by 3412.142. For example, 3 kW × 3412.142 = 10,236.42 BTU/hr. This conversion factor is derived from the relationship between the metric and imperial measurement systems.

What is 1 kW equal to in BTU/hr?

One kilowatt equals exactly 3412.142 BTU per hour. This is a standard conversion factor used in engineering and HVAC calculations worldwide.

Why are both kW and BTU/hr used for power ratings?

Kilowatts are part of the International System of Units and used globally, especially for electrical power. BTU per hour is traditional in the United States for heating and cooling systems. Manufacturers often provide both units to accommodate different markets and customer preferences.

Is the conversion from kW to BTU/hr the same for heating and cooling?

Yes, the conversion factor remains constant at 3412.142 regardless of whether the power is used for heating or cooling. The conversion is based on the fundamental relationship between these two units of power measurement.

How many BTU/hr does a typical air conditioner use?

A typical residential air conditioner ranges from 5,000 to 24,000 BTU/hr (approximately 1.5 to 7 kW). A standard window unit might be 8,000-12,000 BTU/hr (2.3-3.5 kW), while central air systems can range from 18,000-60,000 BTU/hr (5.3-17.6 kW).

Can I use this conversion for electrical heaters?

Yes, this conversion applies to all forms of power including electrical heaters. A 1.5 kW electric heater produces approximately 5,118 BTU/hr of heat output. The conversion is universal across different types of equipment and applications.

What is the difference between BTU and BTU/hr?

BTU (British thermal unit) measures energy, while BTU/hr measures power (the rate of energy transfer). BTU tells you the total amount of energy, whereas BTU/hr indicates how quickly that energy is being used or transferred. When converting from kW, you’re converting to BTU/hr since both are units of power.

How accurate is the 3412.142 conversion factor?

The conversion factor 3412.142 is highly accurate and standardized for most practical applications. The more precise value is 3412.141633 BTU/hr per kW, but 3412.142 provides sufficient accuracy for virtually all engineering and commercial purposes.

Popular Conversions

Conversion Question	Answer
How many BTU/hr is 1 kW?	3,412.14 BTU/hr
How many BTU/hr is 2.5 kW?	8,530.36 BTU/hr
How many BTU/hr is 3.5 kW?	11,942.50 BTU/hr
How many BTU/hr is 5 kW?	17,060.71 BTU/hr
How many BTU/hr is 7 kW?	23,884.99 BTU/hr
How many BTU/hr is 10 kW?	34,121.42 BTU/hr
How many BTU/hr is 12 kW?	40,945.70 BTU/hr
How many BTU/hr is 15 kW?	51,182.13 BTU/hr
How many BTU/hr is 18 kW?	61,418.56 BTU/hr
How many BTU/hr is 24 kW?	81,891.41 BTU/hr