BTU to Tons Converter
Convert BTU per hour to tons of refrigeration, watts, and other power units with this free online converter. Enter any one value and get all equivalents instantly.
About This Calculator
The BTU to Tons Converter is a free online power conversion tool that instantly converts between British Thermal Units per hour (BTU/hr), tons of refrigeration (TR), and watts (W). This calculator is essential for HVAC professionals, air conditioning technicians, engineers, students, and anyone sizing cooling equipment for residential or commercial spaces.
The conversion uses the standard refrigeration industry formulas: 1 ton of refrigeration = 12,000 BTU/hr and 1 watt = 3.412142 BTU/hr. Simply enter any one value — BTU/hr, tons, or watts — and the calculator automatically computes the other two equivalents. This bidirectional design makes it easy to compare cooling capacities across different measurement systems.
How the conversion works: To convert BTU to tons, divide BTU/hr by 12,000. For example, a 24,000 BTU air conditioner equals 2 refrigeration tons. To convert watts to BTU, multiply by 3.412142. A 3,500W commercial unit delivers approximately 11,942 BTU/hr or 1 ton of cooling capacity.
Regional notes: BTU/hr is the standard unit for HVAC equipment ratings in the United States and Canada. Tons of refrigeration is widely used in the US, India, and parts of Asia for specifying air conditioner and chiller capacities. Watts are the SI unit for power used globally in engineering and scientific contexts. Always verify the unit system used by your equipment manufacturer before making purchasing decisions.
Frequently Asked Questions
How do I convert BTU to tons of refrigeration?
To convert BTU per hour to tons of refrigeration, divide the BTU/hr value by 12,000. For example, 24,000 BTU/hr equals 2 tons of refrigeration (24,000 ÷ 12,000 = 2).
How many BTU are in one ton of refrigeration?
One ton of refrigeration equals 12,000 BTU per hour. This standard conversion factor comes from the definition of a refrigeration ton, which is the cooling capacity needed to freeze one ton (2,000 lb) of ice at 0°C in 24 hours.
What is a BTU in air conditioning?
BTU stands for British Thermal Unit. In air conditioning, BTU per hour measures the cooling capacity of an AC unit. Higher BTU ratings mean more cooling power. A 1-ton AC unit has 12,000 BTU/hr, a 1.5-ton unit has 18,000 BTU/hr, and a 2-ton unit has 24,000 BTU/hr.
How do I convert watts to BTU?
To convert watts to BTU per hour, multiply the watt value by 3.412142. For example, 1,000 watts equals 3,412.14 BTU/hr (1,000 × 3.412142 = 3,412.14). To convert watts to tons, multiply watts by 3.412142 then divide by 12,000.
What size room will a 1-ton AC cool?
A 1-ton air conditioner (12,000 BTU/hr) typically cools a room of 400-500 square feet. A 1.5-ton unit (18,000 BTU/hr) covers 600-800 sq ft, and a 2-ton unit (24,000 BTU/hr) covers 800-1,000 sq ft. Actual coverage depends on ceiling height, insulation, sunlight exposure, and local climate.
How many BTU do I need for my room?
A general rule is 20 BTU per square foot of living space. For a 200 sq ft room, you need about 4,000 BTU/hr (0.33 tons). For a 500 sq ft room, you need about 10,000 BTU/hr (0.83 tons). Adjust upward by 10% for sunny rooms, kitchens, or rooms with high ceilings.
Is BTU the same as watt?
No, BTU and watt are different units of power. One watt equals 3.412142 BTU/hr. Watts are the SI unit for power used worldwide, while BTU/hr is commonly used in the United States for heating and cooling equipment ratings.