BTU Calculator — Calculate Heating & Cooling Requirements

BTU Calculator

Calculate the BTU (British Thermal Units) needed to heat or cool your space. Understand how room size, insulation, climate, and other factors affect your HVAC requirements.

Step 1: Room Dimensions

8 ft

Understanding Room Dimensions

BTU calculation is based on room volume (length × width × height). Larger rooms require more BTU to heat or cool effectively. Standard room height is typically 8-9 feet.

Step 2: Environmental Factors

2 people

About BTU Calculation

BTU (British Thermal Unit) measures heating/cooling capacity. Factors like insulation, climate, and room usage significantly affect BTU requirements. Proper calculation ensures efficient HVAC system sizing.

BTU Requirement Results

Summary
Room Comparison
Requirement Analysis

Recommended BTU Requirement

7,500 BTU
For a 180 sq ft room
Room Area
180 sq ft
Room Volume
1,440 cu ft
BTU per sq ft
41.7 BTU
AC Size Needed
0.63 Tons

BTU Requirements by Room Type

Room Type Typical Size BTU Requirement AC Size Heater Size

BTU Requirement Analysis

BTU Calculation Formula

BTU = (Length × Width × Height) × Insulation Factor × Climate Factor × Sun Factor

The BTU requirement is calculated by determining the room volume and adjusting for insulation quality, climate conditions, sunlight exposure, and occupancy. Each factor modifies the base BTU requirement.

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