kW to BTU Calculator
Convert power from kilowatts to BTU quickly and accurately with our kW to BTU calculator. This guide helps you understand the conversion formula, steps, and real-life usage. Use it to size air conditioners, heaters, and other HVAC systems with confidence.
kW to BTU Converter
How to Use kW to BTU Calculator
Follow these simple steps to use the kW to BTU calculator:
- Enter the power value in kilowatts (kW).
- Click the "Calculate" button.
- View the result instantly in BTU/hr.
- Use the result for HVAC sizing or energy analysis.
Tips:
- Always use accurate kW input for better results.
- Double-check units before calculation.
- Use this tool for AC, heaters, and generators.
Conversion / Calculation Guide (kW to BTU)
Formula
Step-by-Step Example
Let’s convert 3.5 kW to BTU/hr:
Step 1: Write the formula
BTU/hr = kW × 3412.142
Step 2: Insert the value
BTU/hr = 3.5 × 3412.142
Step 3: Calculate
BTU/hr = 11,942.5
Final Answer: 3.5 kW = 11,942.5 BTU/hr
Practical Use Case
If you install a 3.5 kW air conditioner, it delivers about 12,000 BTU/hr cooling capacity. This value helps you select the right AC size for your room.
kW to BTU Conversion Chart
| Power (kW) | BTU/hr |
|---|---|
| 0.5 kW | 1,706 BTU/hr |
| 1 kW | 3,412 BTU/hr |
| 1.5 kW | 5,118 BTU/hr |
| 2 kW | 6,824 BTU/hr |
| 2.5 kW | 8,530 BTU/hr |
| 3 kW | 10,236 BTU/hr |
| 3.5 kW | 11,942 BTU/hr |
| 4 kW | 13,648 BTU/hr |
| 5 kW | 17,060 BTU/hr |
| 10 kW | 34,121 BTU/hr |
FAQs (kW to BTU Calculator)
Multiply kilowatts by 3412.142 to get BTU per hour (BTU/hr).
It helps you size heating and cooling systems correctly, ensuring that equipment is powerful enough for its intended space.
No. BTU (British Thermal Unit) measures energy, while BTU/hr measures power or the rate of energy transfer.
Yes. HVAC systems often use BTU/hr to specify cooling and heating capacity, so this conversion is very useful for sizing units.
The calculator provides highly accurate results using the standard international conversion factor of 3412.142.
1 kW equals 3,412.142 BTU/hr.
No, the conversion between kW and BTU/hr is direct. Efficiency ratings like SEER or COP apply when analyzing total system performance, but the power units themselves convert directly.
Yes. Divide BTU/hr by 3412.142 to get the value in kW.
Yes. Engineers and HVAC professionals globally use this conversion to bridge metric and imperial power units.
Air conditioners, heaters, boilers, and generators use this conversion for capacity ratings.