BTU Calculator – Air Conditioning and Heating Calculator

Calculate BTU requirements for heating and cooling systems. Determine the right size air conditioner or heater for your room or building with our BTU calculator.

BTU Calculator – Air Conditioning and Heating Calculator

Calculate BTU requirements for heating and cooling systems. Determine the right size air conditioner or heater for your room or building with our BTU calculator.

Length of the room

Width of the room

Height of the ceiling

Quality of insulation

Local climate conditions

Typical number of people in room

Number of windows in room

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Calculating BTU Requirements

BTU (British Thermal Unit) calculations help determine the right size heating or cooling system for your space. Proper sizing ensures efficiency, comfort, and cost-effectiveness.

How to Use This Calculator

Follow these simple steps to get accurate results:

  1. Enter your room length (feet)
  2. Enter your room width (feet)
  3. Enter your ceiling height (feet)
  4. Enter your insulation quality
  5. Enter your climate zone
  6. Enter your number of occupants
  7. Enter your number of windows
  8. Click the "Calculate" button to see your results
  9. Review the detailed breakdown and explanation

Why Use Our BTU Calculator – Air Conditioning and Heating Calculator?

  • 100% free and no registration required
  • Instant, accurate calculations with professional formulas
  • Mobile-friendly design that works on any device
  • Privacy-focused - your data never leaves your browser
  • Educational content to help you understand the results

Frequently Asked Questions

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