Mechanical horsepower.
Horsepowers to Ton of refrigerations Converter — hp to TR
Convert Horsepower (hp) to Ton of refrigeration (TR) using the exact conversion factor (1 horsepower = 0.2120361315 ton of refrigeration). See the formula, worked examples, conversion table, history, and common uses.
Horsepowers to Ton of refrigerations 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.
Cooling power equal to 12,000 BTU/h.
Result = input x 745.6998716 / 3516.852842.
Power units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Horsepowers to Ton of refrigerations
Horsepower and Ton of refrigeration 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. Horsepower is most often used for us and uk vehicle engine power ratings.
Formula
ton of refrigerations = horsepowers × 0.21203613147
This factor comes from each unit's defined relationship to the category's base unit: 1 horsepower equals 745.699871582 base units, and 1 ton of refrigeration equals 3516.85284207 base units, so dividing one by the other gives the direct horsepower-to-ton of refrigeration factor of 0.21203613147.
Simple example
1 hp × 0.2120361315 = 0.2120361315 TR
1 horsepower = 0.2120361315 ton of refrigerations.
Real-world example
100 hp × 0.2120361315 = 21.20361315 TR
100 horsepowers = 21.20361315 ton of refrigerations.
Conversion table
| Horsepower (hp) | Ton of refrigeration (TR) |
|---|---|
| 1 hp | 0.2120361315 TR |
| 10 hp | 2.120361315 TR |
| 50 hp | 10.60180657 TR |
| 100 hp | 21.20361315 TR |
| 500 hp | 106.0180657 TR |
| 1,000 hp | 212.0361315 TR |
Reverse conversion: Ton of refrigeration to Horsepower
0.2120361315 TR × 4.716177347 = 1 hp
0.2120361315 ton of refrigerations = 1 horsepowers.
horsepowers = ton of refrigerations × 4.71617734707
For a page dedicated to this direction, see Ton of refrigeration to Horsepower.
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.
Understanding the Ton of refrigeration (TR)
Cooling power equal to 12,000 BTU/h.
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 ton of refrigerations are in 1 horsepower?
1 horsepower equals 0.2120361315 ton of refrigerations, using the exact defined conversion factor rather than an estimate.
How do I convert horsepower to ton of refrigeration?
Multiply the horsepower value by 0.2120361315. The converter above does this instantly to whatever precision you set.
How do I convert ton of refrigeration back to horsepower?
Use the reverse factor: 1 ton of refrigeration equals 4.716177347 horsepowers. You can also use the swap control in the converter above to flip the direction instantly.
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.
What is a ton of refrigeration?
Ton of refrigeration (TR) is a unit of engineering.
Is the horsepower to ton of refrigeration 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.
Where is the horsepower still used today?
United States and United Kingdom (vehicle and engine specifications)