Air Conditioner Tonnage Calculator: Find the Right AC Size & BTU Needs

AC Tonnage Calculator

Calculate the optimal air conditioner size for your room based on dimensions, climate, and usage factors.

HVAC Sizing Calculator

Find the right BTU and tonnage for efficient cooling and humidity control

Feet
Inches Switch between feet and inches measurement units
This form calculates the optimal air conditioner size for your room based on dimensions, climate, and various factors.

Room Dimensions

Room Dimensions Input Fields
Enter the length, width, and height of your room
ft Enter the length of your room in feet
ft Enter the width of your room in feet
ft Enter the ceiling height of your room in feet

Location & Room Type

Location and Room Type Selection
Select your country, climate zone, and room type
Select your country to determine climate conditions This will automatically update available climate zones
Select the climate zone that best matches your location Climate zone affects temperature and humidity calculations
Room type affects the cooling requirements Different room types have different heat generation patterns

Room Characteristics

Room Characteristics
Specify occupancy, floor level, and insulation quality
Number of people typically in the room Each person adds approximately 400 BTU to cooling requirements
The floor level affects temperature variances Top floors require more cooling, ground floors less
Better insulation requires less cooling power Good insulation reduces cooling requirements by 15%

Environmental Factors

Environmental Factors
Specify sun exposure and environmental conditions
Higher sun exposure increases cooling requirements High sun exposure increases cooling needs by 20%

Heat-Generating Appliances

Heat-Generating Appliances
Enter the number of heat-generating appliances in your room
Refrigerators generate heat and affect cooling needs Each refrigerator adds approximately 600 BTU
TVs generate heat and affect cooling needs Each TV adds approximately 250 BTU
Lights generate heat and affect cooling needs Each light fixture adds approximately 100 BTU
Ceiling fans can affect air circulation Fans help with air circulation but generate some heat
Calculate your AC tonnage Calculates the optimal air conditioner tonnage based on your inputs

AC Size Recommendation

Calculation Summary

Climate Data (Max):
43°C / 109°F, 30% Humidity
Room Area:
144 sq ft
Room Volume:
1440 cubic ft
Total Adjustment:
1.79x

Recommended AC Size

0.75 Ton

8,644 BTU

What This Means

Based on your room's dimensions and conditions, we recommend a 0.75 ton air conditioner. This size will efficiently cool your space while maintaining proper humidity levels. The calculation takes into account your local climate conditions and applies a combined adjustment factor of 1.79x to ensure optimal performance in your specific environment.

This AC tonnage calculator uses professional HVAC formulas based on ASHRAE standards to provide accurate air conditioner sizing recommendations.

For more information on efficient cooling, energy savings, and air conditioner installation, visit our HVAC Resources.

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