BTU/h → TR (ton refrig)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The BTU/h to TR (ton of refrigeration) calculator is a vital tool for conversions in heating, ventilation, and air conditioning (HVAC) systems. It converts thermal capacity values, expressed in BTU per hour (BTU/h), into tons of refrigeration (TR) by dividing the input by 12,000. This is based on the standard equivalence of 1 TR equaling 12,000 BTU/h, widely adopted in the industry.
This conversion is commonly used in air conditioning projects, HVAC design, and refrigeration equipment sizing. For instance, a 24,000 BTU/h unit equals 2 TR. The calculator simplifies technical analysis, ensuring systems meet space requirements and energy efficiency standards. It’s particularly useful for comparing cooling capacities across different units and specifications.
Always confirm the input unit is correct, as confusing BTU/h with BTU (British Thermal Unit) can lead to errors. In specialized industrial contexts, conversion factors might adjust for compressor efficiency or operational conditions. Use this calculator for basic calculations, but consult an expert for complex scenarios involving variable loads or performance curves.
To use, enter the BTU/h value and click "Calculate." The result will display in TR automatically. This tool suits engineers, technicians, and consumers needing to size or compare cooling systems. Note that the 1 TR = 12,000 BTU/h ratio is a standard benchmark, though actual applications might require adjustments for real-world efficiency factors.
Frequently asked questions
Why divide by 12,000?
Because one ton of refrigeration (TR) is defined as 12,000 BTU/h. This ratio originated from the amount of heat required to freeze one ton of water in 24 hours, a standard in the HVAC industry.
When should I use this calculator?
Use it to size air conditioners, compare refrigerator capacities, or design industrial cooling systems. It's essential for residential and commercial climate control projects.
Is TR the same unit worldwide?
No, some regions use the US ton of refrigeration (12,000 BTU/h), while others use the metric ton (11,630 BTU/h). Always verify local standards before applying results.
Is this calculator suitable for large industrial systems?
For complex industrial applications, include factors like equipment efficiency and thermal losses. This tool is best for basic calculations and initial guidance.