BTU Conversion Calculator โ Convert BTU to Any Energy Unit
Convert BTU to watts, kW, tons of refrigeration, CFM, joules, therms, horsepower, calories, and more with live formulas.
How We Calculate BTU Conversions
The conversion calculator uses fixed engineering constants. For example, 1 BTU equals 0.293071 watts, 1 ton of refrigeration equals 12,000 BTU per hour, and 1 BTU equals 1,055.06 joules. Airflow conversions require an assumed temperature change because CFM depends on both heat transfer and air temperature rise or drop.
BTU Conversion Table
| Reference | Equivalent |
|---|---|
| 1 BTU | 0.293 watts |
| 1 kW | 3,412.14 BTU/hr |
| 1 ton | 12,000 BTU/hr |
| 1 therm | 100,000 BTU |
| 1 BTU | 1,055.06 joules |
| 1 horsepower | 2,545 BTU/hr |
| 1 BTU | 251.996 calories |
| 1 MCF natural gas | ~1,037,000 BTU |
Frequently Asked Questions
How many BTU is 1 kW?
One kilowatt equals 3,412.14 BTU per hour. This is one of the most common HVAC and power-rate conversions.
How to convert BTU to watts?
Multiply BTU by 0.293071 to convert to watts. If you are converting BTU per hour, the same factor applies to the rate.
How many BTU in 1 ton of AC?
One ton of air conditioning equals 12,000 BTU per hour. A 2-ton system is 24,000 BTU/hr and a 3-ton system is 36,000 BTU/hr.
How to convert kW to BTU per hour?
Multiply kilowatts by 3,412.14 to get BTU/hr. This is the inverse of the BTU/hr to kW conversion.