top of page

kW, HP, BTU Unit Converter

Instructions:

Enter the value of the unit to convert

  1. Review the methodology to make sure it aligns with your project's requirements.

  2. Select one of the following unit types:

    • Btu/hour​

    • foot pound-force/hour

    • horsepower

    • kilowatt

    • MBH

    • pound-foot/hour

    • ton (refrigeration)

    • watt

  3. The Results table will calculate and auto-populate all the conversions.

kW, HP, BTU Unit converter

🔧 Power Conversion Calculator Methodology


Overview


This calculator converts between common units of power and energy rate used in HVAC design, mechanical engineering, and energy analysis.


All conversions are based on standardized constants defined by ASHRAE Fundamentals (2021), U.S. Department of Energy (DOE), and NIST.


________________________________________________________________________________
Conversion Formulas


From 1 Btu/hr                     Multiply by                                                   To Get


778.169                                  foot-pound-force/hour                   P_(ft⋅lb/h)=778.169×P_(Btu/h)


0.000293071                      kilowatt                                                      P_kW=0.000293071×P_(Btu/h)


0.293071                                watt                                                              P_W=0.293071×P_(Btu/h)


1/1000                                    MBH                                                              P_MBH=P_(Btu/h)/1000


1/12,000                                ton (refrigeration)                                P_ton=P_(Btu/h)/(12,000)


1/2544.43                          horsepower                                                P_hp=P_(Btu/h)/(2544.43)
________________________________________________________________________________


Worked Example


Convert 900 Btu/hr to all other units:

​

P_kW =900×0.000293071 = 0.2638 kW 

​

P_hp=900/2544.43=0.354 hp 

​

P_ton=900/12,000=0.075 ton (refrigeration)

​

P_W=900×0.293071=264 W

​

P_MBH=900/1000=0.90 MBH

 

Resulting conversions match standard HVAC reference tables and can be cross-checked in the ASHRAE Handbook—Fundamentals, Chapter 1 (Units and Conversion Factors).



References

 

  •    ASHRAE Handbook—Fundamentals (2021), Ch. 1 “Units and Conversions”

  •    U.S. Department of Energy, Energy Units and Conversions Fact Sheet

  •    NIST SP 811, Guide for the Use of the International System of Units (SI)

 

Disclaimer
Results are intended for preliminary engineering estimates. Adicot Inc. makes no guarantee of accuracy for design or code-compliance documentation.

©2014-2025 by Adicot, Inc.

Report a Problem with our HVAC Calculators

​

Adicot, Inc.'s calculators are intended for professionals. Adicot, Inc. makes no warranty of any kind, expressed or implied, concerning the information contained on this website. The information presented on this website shall be used by professionals who understand the implications of the results. If professional services are required, please consult a licensed professional engineer in your local jurisdiction, as building codes vary by location. The author and publisher shall not be liable in the event of damages of any kind in connection with, or arising from, the use of the information contained within this website.  Any use of this website, including the calculators, is at the user’s sole risk. Use of the website, including the calculators, in any way shall constitute an acknowledgment and acceptance of the foregoing.

​

​The calculators' accuracies are dependent on user-supplier data. It is the user's responsibility to understand how the data entered affects the calculators' output. The calculation results are intended to assist the designer and should not be used as a substitute for professional design services, judgment, or experience. The user accepts all responsibility for any claims, actions, or damages from using the calculators.

"Widget Making Since 2014"
Builder
bottom of page