Kilowatts to BTU/hr Conversion Calculator

Kilowatts to BTU/hr Calculator

Enter power in kilowatts:

BTU/hr result: BTU/hr

A kW to BTU/hr calculator converts power measurements between kilowatts (kW) (metric/SI unit) and British Thermal Units per hour (BTU/hr) (imperial unit). This conversion is essential for:
✅ HVAC systems (air conditioners, heaters)
✅ Industrial heating/cooling
✅ Energy efficiency calculations
✅ Appliance power ratings

Conversion Formulas

1. kW to BTU/hr

P (B T U / h r) = P (k W) \times 3, 412.142

Example:

Convert 5 kW to BTU/hr:
$5 \times 3, 412.142 = 17, 060.71 BTU/hr$

2. BTU/hr to kW

P (k W) = \frac{P (B T U / h r)}{3, 412.142}

Example:

Convert 10,000 BTU/hr to kW:
$10, 000 \div 3, 412.142 \approx 2.93 kW$

Conversion Table (kW ⇆ BTU/hr)

Kilowatts (kW)	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
5 kW	17,060.71 BTU/hr
10 kW	34,121.42 BTU/hr
20 kW	68,242.84 BTU/hr

How to Use the Calculator

Enter kW → Get BTU/hr (Multiply by 3,412.142)
Enter BTU/hr → Get kW (Divide by 3,412.142)

Example Calculations:

3.5 kW to BTU/hr:
$3.5 \times 3, 412.142 = 11, 942.5 BTU/hr$
24,000 BTU/hr to kW:
$24, 000 \div 3, 412.142 \approx 7.03 kW$

Practical Applications

Air Conditioners: "12,000 BTU/hr = ~3.5 kW" (1 ton of cooling)
Heaters: Electric heaters often rated in kW/BTU
Boilers: Steam/hot water system capacity
Energy Audits: Comparing system efficiencies

Comparison of Power Units

Unit	Equivalent in kW	Equivalent in BTU/hr
1 kW	1 kW	3,412 BTU/hr
1 BTU/hr	0.000293 kW	1 BTU/hr
1 Ton (AC)	3.517 kW	12,000 BTU/hr

FAQ

1. How many BTU/hr is 1 kW?

✅ 1 kW = 3,412 BTU/hr

2. Why do air conditioners use BTU/hr?

🔹 Historical convention (BTU measures heat removal capacity)

3. Is BTU/hr the same as horsepower?

❌ No – 1 HP = 2,545 BTU/hr

4. How to convert 7.5 kW to BTU/hr?

7.5 \times 3, 412.142 = 25, 591 BTU/hr

5. What's a quick estimation method?

🔹 "Multiply kW by 3,400" for rough BTU/hr values

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