Cooling power equal to 12,000 BTU/h.
Ton of refrigerations to Horsepowers Converter — TR to hp
Convert Ton of refrigeration (TR) to Horsepower (hp) using the exact conversion factor (1 ton of refrigeration = 4.716177347 horsepower). See the formula, worked examples, conversion table, history, and common uses.
Ton of refrigerations to Horsepowers converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Mechanical horsepower.
Result = input x 3516.852842 / 745.6998716.
Power units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Ton of refrigerations to Horsepowers
Ton of refrigeration and Horsepower both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Cooling power equal to 12,000 BTU/h, and mechanical horsepower.
Formula
horsepowers = ton of refrigerations × 4.71617734707
This factor comes from each unit's defined relationship to the category's base unit: 1 ton of refrigeration equals 3516.85284207 base units, and 1 horsepower equals 745.699871582 base units, so dividing one by the other gives the direct ton of refrigeration-to-horsepower factor of 4.71617734707.
Simple example
1 TR × 4.716177347 = 4.716177347 hp
1 ton of refrigeration = 4.716177347 horsepowers.
Real-world example
100 TR × 4.716177347 = 471.6177347 hp
100 ton of refrigerations = 471.6177347 horsepowers.
Conversion table
| Ton of refrigeration (TR) | Horsepower (hp) |
|---|---|
| 1 TR | 4.716177347 hp |
| 10 TR | 47.16177347 hp |
| 50 TR | 235.8088674 hp |
| 100 TR | 471.6177347 hp |
| 500 TR | 2,358.088674 hp |
| 1,000 TR | 4,716.177347 hp |
Reverse conversion: Horsepower to Ton of refrigeration
4.716177347 hp × 0.2120361315 = 1 TR
4.716177347 horsepowers = 1 ton of refrigerations.
ton of refrigerations = horsepowers × 0.21203613147
For a page dedicated to this direction, see Horsepower to Ton of refrigeration.
Understanding the Ton of refrigeration (TR)
Cooling power equal to 12,000 BTU/h.
Understanding the Horsepower
Horsepower (hp) measures power. Mechanical horsepower is defined as exactly 745.6998715822702 watts. It is classified as a US/imperial customary unit.
Where it's used: United States and United Kingdom (vehicle and engine specifications)
Mechanical horsepower vs. metric horsepower. Mechanical horsepower (745.7 W) and metric horsepower/PS (735.5 W) differ by about 1.4% — a US car spec sheet in 'hp' and a European one in 'PS' are not directly comparable numbers without conversion.
Uses of the Horsepower today
- US and UK vehicle engine power ratings
- Motor and engine specifications in English-speaking markets
History of the Horsepower
James Watt popularized horsepower in the 1780s as a marketing figure, comparing his steam engines' output to the working capacity of a horse (based on his estimate of a horse turning a mill), so buyers could grasp engine capability in familiar terms. The unit stuck long after its origin as a sales tool, eventually being formally defined at exactly 550 foot-pounds per second.
Historical origin. Horsepower was not the invention of a single named person; it developed through the process described above.
Horsepower — sources
- NIST Special Publication 811 — Documents the exact watt-equivalence of mechanical horsepower.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many horsepowers are in 1 ton of refrigeration?
1 ton of refrigeration equals 4.716177347 horsepowers, using the exact defined conversion factor rather than an estimate.
How do I convert ton of refrigeration to horsepower?
Multiply the ton of refrigeration value by 4.716177347. The converter above does this instantly to whatever precision you set.
How do I convert horsepower back to ton of refrigeration?
Use the reverse factor: 1 horsepower equals 0.2120361315 ton of refrigerations. You can also use the swap control in the converter above to flip the direction instantly.
What is a ton of refrigeration?
Ton of refrigeration (TR) is a unit of engineering.
What is a horsepower?
Horsepower (hp) measures power. Mechanical horsepower is defined as exactly 745.6998715822702 watts. It is classified as a US/imperial customary unit.
Is the ton of refrigeration to horsepower conversion exact?
Yes. Mechanical horsepower is defined as exactly 745.6998715822702 watts. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
What is the difference between mechanical horsepower vs. metric horsepower?
Mechanical horsepower (745.7 W) and metric horsepower/PS (735.5 W) differ by about 1.4% — a US car spec sheet in 'hp' and a European one in 'PS' are not directly comparable numbers without conversion.