BTU/hr and Refrigeration Tons Converter

What Is a 'Ton' of Refrigeration?

The term Ton of Refrigeration (TR) originates from the late 19th-century ice harvesting and cold storage trade prior to electric mechanical refrigeration.

The Latent Heat of Ice

A ton of refrigeration is defined as the rate of heat removal required to freeze 1 US short ton (2,000 lbs) of liquid water at 32°F (0°C) into ice at 32°F over a 24-hour period:

• Latent heat of fusion of ice = \

• Total heat for 2,000 lbs = \

• Rate per hour = \

Common AC Sizing Equivalents

• 1.5 Ton: 18,000 BTU/hr (5.28 kW thermal, 600 CFM)

• 2.0 Ton: 24,000 BTU/hr (7.03 kW thermal, 800 CFM)

• 2.5 Ton: 30,000 BTU/hr (8.79 kW thermal, 1,000 CFM)

• 3.0 Ton: 36,000 BTU/hr (10.55 kW thermal, 1,200 CFM)

• 3.5 Ton: 42,000 BTU/hr (12.31 kW thermal, 1,400 CFM)

• 4.0 Ton: 48,000 BTU/hr (14.07 kW thermal, 1,600 CFM)

• 5.0 Ton: 60,000 BTU/hr (17.58 kW thermal, 2,000 CFM)

How to Use This Calculator

Enter Conversion Direction, Cooling / Refrigeration Capacity, AC Efficiency Rating for Power Draw into the input fields and the calculator will instantly compute Primary Converted Result, Refrigeration Capacity. All calculations happen in real time — no submission or page reload required. You can adjust any input value and see the result update immediately.

Understanding Your Result

The BTU/hr and Refrigeration Tons Converter result gives you a precise, calculated value based on the inputs you provide. Compare your result against published benchmarks from NIST, BIPM, and ISO 80000 to assess where you stand. A single calculation is a useful starting point, but tracking this metric over time — as inputs change — gives you a much more complete picture.

Practical Application

The BTU/hr and Refrigeration Tons Converter is most useful when you have specific, real-world data to enter. For example: enter your actual Conversion Direction to calculate your primary converted result. The result helps engineers, scientists, students, and international traders make informed decisions about converting between measurement units for science, engineering, and commerce. This calculator is trusted by professionals and individuals alike because it follows the exact formulas validated by NIST, BIPM, and ISO

80000.

Accuracy Notes and Limitations

For legal or trade filings, verify conversions against official government or standards body references. The accuracy of any calculator is limited by the quality of the inputs provided. Double-check your units before entering values — unit errors are the most common source of incorrect results. For critical decisions, cross-reference with at least one additional source or professional consultation.

Frequently Used With

This calculator is often used alongside other conversion tools to build a complete analytical picture. Combining multiple related calculations provides stronger evidence for decisions than relying on any single metric. Browse the Conversion category to find complementary calculators for your specific use case.