Kilocalorie per Hour (thermochemical) to Horsepower (mechanical) Converter
Power · unit-converter
Convert Kilocalorie per Hour (thermochemical) to Horsepower (mechanical) with a fixed input and output unit, step-by-step formula line, and reference tables. Linear units use SI watt definitions; mechanical hp uses 550 ft·lbf/s; BTU/h uses the IT BTU; dBm/dBW are logarithmic relative to 1 mW and 1 W. The full Power Converter also includes PS/CV, TR, kVA/MVA, and ft·lb/s.
Calculator
From: Kilocalorie per Hour (thermochemical) (kcal_h)
To: Horsepower (mechanical) (hp)
About Kilocalorie per Hour (thermochemical)
Kilocalories per hour is a thermal power rate using the thermochemical kilocalorie (4,184 J per kcal) spread over one hour.
About Horsepower (mechanical)
Mechanical horsepower here is the US definition: 550 ft·lbf/s ≈ 745.70 W. Automotive and industrial specs often cite hp.
How to convert kilocalories per hour (thermochemical) to horsepower (mechanical, 550 ft·lb/s)
1 kilocalorie per hour (thermochemical) is equal to 0.00155856567302 horsepower (mechanical) when both are expressed in watt-equivalents:
1 kcal_h = (1.1622222222222223 W ÷ 745.6998715822702 W) hp = 0.00155856567302 hp
Each kilocalorie per hour (thermochemical) is defined as 1.1622222222222223 W and each horsepower (mechanical) as 745.6998715822702 W in this tool, so one kcal_h equals 1.1622222222222223 ÷ 745.6998715822702 hp = 0.00155856567302 hp.
Let d(kcal_h) be the numeric value in Kilocalorie per Hour (thermochemical) (kcal_h), and d(hp) the value in Horsepower (mechanical) (hp). Then:
d(hp) = d(kcal_h) × (1.1622222222222223 / 745.6998715822702)
Equivalently, divide by how many kcal_h fit into one hp (watts per hp divided by watts per kcal_h):
d(hp) = d(kcal_h) ÷ 641.61556828302412
Or: horsepower (mechanical) = kilocalorie per hour (thermochemical) ÷ 641.61556828302412
Examples
Example #1: Convert 1 kcal_h to horsepower (mechanical)
1 kcal_h = 1 kcal_h × (1.1622222222222223/745.6998715822702) hp = 0.0015585657 hp
1 kcal_h = 1 kcal_h ÷ 641.61556828302412 = 0.0015585657 hp
Intermediate watts: 1.1622222222 W
Example #2: Convert 10 kcal_h to horsepower (mechanical)
10 kcal_h = 10 kcal_h × (1.1622222222222223/745.6998715822702) hp = 0.0155856567 hp
10 kcal_h = 10 kcal_h ÷ 641.61556828302412 = 0.0155856567 hp
Intermediate watts: 11.6222222222 W
Summary
To convert Kilocalorie per Hour (thermochemical) to Horsepower (mechanical), multiply the value in kcal_h by the ratio of watts per kcal_h divided by watts per hp. Equivalently: value_hp = value_kcal_h × (1.1622222222222223 / 745.6998715822702). Numerically, 1 kcal_h equals 0.0015585656730182213 hp.
Relationship context
You are converting between thermal engineering rates (BTU/h, kcal/h) (Kilocalories per Hour (thermochemical)) and mechanical power (horsepower, ft·lb/s) (Horsepower (mechanical, 550 ft·lb/s)). All linear values are mapped through watts first. The numeric factor is 1.558566e-3.
Conversion tables
| Kilocalorie per Hour (thermochemical) (kcal_h) | Horsepower (mechanical) (hp) |
|---|---|
| 0.1 | 0.0001558566 |
| 1 | 0.0015585657 |
| 2 | 0.0031171313 |
| 3 | 0.004675697 |
| 4 | 0.0062342627 |
| 5 | 0.0077928284 |
| 6 | 0.009351394 |
| 7 | 0.0109099597 |
| 8 | 0.0124685254 |
| 9 | 0.0140270911 |
| Kilocalorie per Hour (thermochemical) (kcal_h) | Horsepower (mechanical) (hp) |
|---|---|
| 10 | 0.0155856567 |
| 20 | 0.0311713135 |
| 30 | 0.0467569702 |
| 40 | 0.0623426269 |
| 50 | 0.0779282837 |
| 60 | 0.0935139404 |
| 70 | 0.1090995971 |
| 80 | 0.1246852538 |
| 90 | 0.1402709106 |
| 100 | 0.1558565673 |