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BTU Calculator

Calculate the required BTU for air conditioning or heating based on room size and conditions.

Recommended BTU
0
BTU/hour
Room Area 0 sq ft

BTU Calculator Guide

What is BTU?

BTU (British Thermal Unit) is a unit of heat. This calculator helps determine how many BTUs your air conditioner or heater needs to effectively cool or heat a room.

Calculation Factors

  • Room Size: Larger rooms require more BTUs.
  • Ceiling Height: Higher ceilings increase the volume of air to condition.
  • Insulation: Poor insulation requires more BTUs.

General Guidelines

  • 5,000 BTU for small rooms (~150 sq ft)
  • 10,000 BTU for medium rooms (~350 sq ft)
  • 20,000+ BTU for large spaces