kW to BTU/hr Calculator
Convert kilowatts (kW) to BTU per hour (BTU/hr) using this easy tool. This is especially helpful for comparing electric and thermal energy in HVAC systems, generators, and industrial heating equipment.
Understanding the Conversion from kW to BTU/hr
Converting kilowatts (kW) to British Thermal Units per hour (BTU/hr) is common in energy, HVAC, heating systems, and generator applications. This conversion bridges the metric and imperial systems, allowing users to understand and compare power ratings across industries.
What is a Kilowatt?
A kilowatt (kW) is a unit of power in the International System of Units (SI). One kilowatt equals 1,000 watts and is used to express the rate at which energy is consumed or generated. It is widely used for electrical and mechanical power ratings.
What is a BTU/hr?
BTU/hr (British Thermal Units per hour) is a unit of power used primarily in the United States. It measures the amount of thermal energy transferred per hour. One BTU is the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit.
Conversion Formula
1 kilowatt (kW) = 3,412.142 BTU/hr
To convert kilowatts to BTU/hr, use the following formula:
BTU/hr = kW × 3,412.142
Example Conversions
- 1 kW = 3,412.142 BTU/hr
- 5 kW = 17,060.71 BTU/hr
- 10 kW = 34,121.42 BTU/hr
- 0.75 kW = 2,559.11 BTU/hr
When is This Conversion Used?
This conversion is useful in many real-world applications:
- HVAC System Design: BTU/hr is the standard unit for air conditioners, heat pumps, and furnaces.
- Generator Efficiency: Helps translate mechanical/electrical output to thermal equivalents.
- Boiler and Furnace Ratings: Many fuel-fired systems are rated in BTU/hr.
- Renewable Energy: Solar thermal systems may require BTU/hr estimates for comparison.
Quick Reference Table
| kW | BTU/hr |
|---|---|
| 0.5 | 1,706.07 |
| 1 | 3,412.14 |
| 2 | 6,824.28 |
| 5 | 17,060.71 |
| 10 | 34,121.42 |
| 20 | 68,242.84 |
kW vs. BTU/hr: Which One to Use?
Use kilowatts for:
- Electrical engineering
- Mechanical systems in SI-based countries
- International generator specs
Use BTU/hr for:
- HVAC systems in the US
- Boiler and fuel heating systems
- Thermal efficiency ratings
Frequently Asked Questions
What is the exact conversion factor from kW to BTU/hr?
1 kW = 3,412.142 BTU/hr
Can I use this conversion for cooling as well?
Yes. Both heating and cooling loads in HVAC are commonly expressed in BTU/hr.
How do I convert BTU/hr back to kW?
Use the formula: kW = BTU/hr ÷ 3,412.142
Is kW a larger unit than BTU/hr?
Yes. kW is a metric unit that generally represents more energy per unit. BTU/hr is a smaller, older imperial unit.