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

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Conversion Formulas

1. kW to BTU/hr

$$P(BTU\mathrm{/}hr)=P(kW)\times 3,412.142$$

Example:

• Convert 5 kW to BTU/hr:

$$5\times 3,412.142=17,060.71\text{ BTU/hr}$$

2. BTU/hr to kW

$$P(kW)=\frac{P(BTU\mathrm{/}hr)}{3,412.142}$$

Example:

• Convert 10,000 BTU/hr to kW:

$$10,000÷3,412.142\approx 2.93\text{ kW}$$

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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

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How to Use the Calculator

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

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

Example Calculations:

• 3.5 kW to BTU/hr:

$$3.5\times 3,412.142=11,942.5\text{ BTU/hr}$$

• 24,000 BTU/hr to kW:

$$24,000÷3,412.142\approx 7.03\text{ kW}$$

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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

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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

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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?

$$7.5\times 3,412.142=25,591\text{ BTU/hr}$$

5. What's a quick estimation method?

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