How many kW is 1hp? How many watts is 1hp? These are questions that almost anyone entering a technical role in the field will search for at least once.
Is the answer easy to find? If not, read through this comprehensive article from Thái Khương!
Looking to purchase equipment? Need to select a pump with the right motor power (HP / kW)? Browse the Thái Khương industrial pump catalogue — filter quickly by flow rate, head, and motor power.
How Many Watts Is 1HP
How many watts is 1hp, or 1 horsepower? Why ask this question, and when does it come up?
In Thái Khương’s view, 99% of the time this question comes from people researching equipment that involves motors, such as air conditioners, refrigerators, generators, and especially water pumps and industrial pumps.
Because there is no single unified power unit that everyone uses, different types of equipment today use different unit names to express power. For example, motors, engines, and pumps use hp, W, or kW to indicate power output.
This is why many people get confused when they are only familiar with one type of power unit — either hp (horsepower) or W (watts).
Back to the question. Long ago, when people established equivalent units, they also calculated specific conversion values between these units.
By convention, 1hp (one horsepower) equals 745.699872 W. In practice, however, not every country uses this exact figure — the accepted value may range between 736 and 746 W.
How Many kW Is 1HP
Similarly, once you know the conversion factor the answer is straightforward.
When converting 1hp to kW, keep in mind that the prefix “k” stands for 1,000 — a figure we encounter every day.
Therefore: 1hp = 745.699872 W = 0.745699872 kW. In practice the value falls between 0.736 kW and 0.746 kW.
| Kilo-
watts (kW) |
Mechanic horsepower
(Mechanical horsepower) (hp(I)) |
Electric horsepower
(Electrical horsepower) (hp(E)) |
Metric horsepower
(Metric horsepower) (hp(M)) |
| 0.001 kW | 0.001341 hp | 0.001340 hp | 0.001360 hp |
| 0.002 kW | 0.002682 hp | 0.002681 hp | 0.002719 hp |
| 0.003 kW | 0.004023 hp | 0.004021 hp | 0.004079 hp |
| 0.004 kW | 0.005364 hp | 0.005362 hp | 0.005438 hp |
| 0.005 kW | 0.006705 hp | 0.006702 hp | 0.006798 hp |
| 0.006 kW | 0.008046 hp | 0.008043 hp | 0.008158 hp |
| 0.007 kW | 0.009387 hp | 0.009383 hp | 0.009517 hp |
| 0.008 kW | 0.010728 hp | 0.010724 hp | 0.010877 hp |
| 0.009 kW | 0.012069 hp | 0.012064 hp | 0.012237 hp |
| 0.01 kW | 0.013410 hp | 0.013405 hp | 0.013596 hp |
| 0.02 kW | 0.026820 hp | 0.026810 hp | 0.027192 hp |
| 0.03 kW | 0.040231 hp | 0.040214 hp | 0.040789 hp |
| 0.04 kW | 0.053641 hp | 0.053619 hp | 0.054385 hp |
| 0.05 kW | 0.067051 hp | 0.067024 hp | 0.067981 hp |
| 0.06 kW | 0.080461 hp | 0.080429 hp | 0.081577 hp |
| 0.07 kW | 0.093871 hp | 0.093834 hp | 0.095174 hp |
| 0.08 kW | 0.107282 hp | 0.107239 hp | 0.108770 hp |
| 0.09 kW | 0.120692 hp | 0.120643 hp | 0.122366 hp |
| 0.1 kW | 0.134022 hp | 0.134048 hp | 0.135962 hp |
| 0.2 kW | 0.268204 hp | 0.268097 hp | 0.271924 hp |
| 0.3 kW | 0.402307 hp | 0.402145 hp | 0.407886 hp |
| 0.4 kW | 0.536409 hp | 0.536193 hp | 0.543849 hp |
| 0.5 kW | 0.670511 hp | 0.670241 hp | 0.679811 hp |
| 0.6 kW | 0.804613 hp | 0.804290 hp | 0.815773 hp |
| 0.7 kW | 0.938715 hp | 0.938338 hp | 0.951735 hp |
| 0.8 kW | 1.072817 hp | 1.072386 hp | 1.087697 hp |
| 0.9 kW | 1.206920 hp | 1.206434 hp | 1.223659 hp |
| 1 kW | 1.341022 hp | 1.340483 hp | 1.359622 hp |
| 2 kW | 2.682044 hp | 2.680965 hp | 2.719243 hp |
| 3 kW | 4.023066 hp | 4.021448 hp | 4.078865 hp |
| 4 kW | 5.364088 hp | 5.361930 hp | 5.438486 hp |
| 5 kW | 6.705110 hp | 6.702413 hp | 6.798108 hp |
How Many BTU Is 1HP
BTU is a unit commonly used in refrigeration and HVAC. BTU stands for British Thermal Unit — a measure of the heat value of fuel in air-conditioning, cooling, or heating systems. This unit is widely used in the United States and the United Kingdom.
BTU is also used to describe the power output of residential cooling and heating equipment.
So, how many hp is 1 BTU? Or how many BTU is 1hp?
Here is the answer!
You may have noticed that air-conditioner product labels often state 1hp = 9000 BTU, or 1.5hp = 12000 BTU…
So the answer is: 1hp = 9000 BTU.
The conversion table is as follows:
|
Horsepower |
BTU |
|
1HP |
9000 |
|
1.5HP |
12000 |
|
2HP |
18000 |
| 2.5HP |
24000 |
How Many Cooling kW Is 1HP
In practice, no one directly converts between these two units. HP is a unit of electrical power, so it is not converted directly into cooling kW because the result depends on the Coefficient of Performance (COP), which varies by manufacturer.
The relationship is: Electrical power = Cooling power / COP
In general:
Cooling power: 1HP = 9000 BTU/h = 2.64 kW
- Electrical power = cooling power / (2.4 to 2.7)
How Many kW Is 2HP
How many kW is 2hp — in other words, how many kilowatts are in 2 horsepower?
Once you know the conversion factor, answering this question is straightforward.
We have: 1hp = 0.746 kW, therefore 2hp = 1.492 kW.
How Many kW Is 5HP
Applying the same formula:
- 1hp = 0.746 kW
- 5hp = 5 × 0.746 = 3.73 kW
So 5hp equals 3.73 kW.
How Many Watts Is 1.5HP
How many watts is 1.5hp is a question that often comes up when researching air-conditioning equipment. It is also a common calculation when selecting a pump for a given application.
Using the conversion factor 1hp = 746 W, we get: 1.5hp = 1,119 W.
How Many kVA Is 1 Horsepower
kVA is a unit of apparent power. You will often encounter it on transformers, voltage stabilisers, and similar electrical equipment.
To answer how many kVA is 1 horsepower, we need to examine the relationship between the units. Because hp cannot be converted directly to kVA, the calculation must go through W or kW.
To determine how many kW equals 1 kVA, we use the formula:
kW = kVA × Cos(Ø)
Since Cos(Ø) = 0.2 – 0.8, it follows that 1 kVA = 0.2 – 0.8 kW.
From this we calculate: 1 kW = 0.8 kVA => 1 kVA = 0.9325 HP
Or, equivalently, 1 horsepower = 1.07239 kVA.
In this article, Thái Khương has covered how many kW is 1hp, along with a range of useful knowledge and conversion values for the most common power units. If you need further technical guidance or advice on selecting the right pump solution, please contact Thái Khương directly!
