HVAC CALCULATOR

HVAC Unit Conversions

Convert common HVAC measurements for capacity, airflow, temperature, pressure, dimensions, power and water flow.

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Select the HVAC measurement you want to convert.

BTU/hr
3.5169 kW
12,000 BTU/hr is approximately 3.5169 kW
Original Value 12,000 BTU/hr
Converted Value 3.5169 kW
Conversion Formula BTU/hr ÷ 3,412.142 = kW
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HVAC Conversion Quick Reference

Common conversion factors used throughout this calculator.

1 kW 3,412.142 BTU/hr
1 Ton 12,000 BTU/hr
1 CFM 1.699 m³/h
1 CFM 0.47195 L/s
1 PSI 6.89476 kPa
1 in. WC 249.089 Pa
1 Inch 25.4 mm
1 HP 0.7457 kW
1 Watt 3.41214 BTU/hr
1 US GPM 3.78541 L/min
1 US GPM 0.227125 m³/h
⚠️ Capacity and Electrical Power Are Not Always the Same Thing

BTU/hr and kW can both describe a rate of energy transfer, but an HVAC system’s thermal capacity should not automatically be interpreted as its electrical power consumption. For example, converting 36,000 BTU/hr gives approximately 10.55 kW of thermal capacity, but that does not mean a 36,000 BTU/hr air conditioner consumes 10.55 kW of electricity.

Important: These conversions provide estimated values based on standard conversion factors. Equipment ratings, field measurements and engineering calculations may require additional precision, conditions or manufacturer-specific information. For equipment selection, system design or critical HVAC calculations, verify specifications and consult a qualified HVAC professional.

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