HP (Horsepower) Calculator
Use this advanced hp calculator to compute both electrical and mechanical horsepower with accuracy. Calculate single-phase, three-phase, and mechanical HP in seconds without confusion. This hp calculator helps engineers, electricians, and students get fast and reliable results.
Horsepower Converter
How to Use HP Calculator
Follow these steps to use the hp calculator correctly:
- Select the calculation type: Choose between Electrical HP (Single/Three Phase) or Mechanical HP.
- Enter the required values:
- For electrical: Voltage (V), Current (I), Power factor (PF), and Efficiency (η).
- For mechanical: Torque and RPM or Watts.
- Choose the correct unit: The calculator defaults to HP (Horsepower).
- Click the "Calculate" button: The hp calculator will display the result instantly.
- Use the result: Apply it for motor sizing, load calculations, or system design.
Conversion / Calculation Guide
Horsepower is a unit of measurement for power, describing the rate at which work is done. It can be derived from electrical or mechanical inputs using specific constants.
1. Electrical HP (Single Phase)
Single-phase motors are commonly used in domestic applications.
Formula:Step-by-Step Example:
Given: Voltage = 230 V, Current = 10 A, Power Factor = 0.9, Efficiency = 0.85
Step 1: Multiply values: 230 × 10 × 0.9 × 0.85 = 1759.5
Step 2: Divide by 746: HP = 1759.5 ÷ 746
Step 3: Result: HP ≈ 2.36
2. Electrical HP (Three Phase)
Three-phase systems are standard for industrial and commercial power distribution.
Formula:Step-by-Step Example:
Given: Voltage = 400 V, Current = 8 A, Power Factor = 0.85, Efficiency = 0.9
Step 1: Multiply values: √3 × 400 × 8 × 0.85 × 0.9 ≈ 4242.6
Step 2: Divide by 746: HP = 4242.6 ÷ 746
Step 3: Result: HP ≈ 5.68
3. Mechanical HP
Mechanical horsepower can be calculated from torque or wattage.
Formula (from Watts):Step-by-Step Example (Torque Method):
Given: Torque = 100 Nm, RPM = 1500
Step 1: Multiply: 100 × 1500 = 150000
Step 2: Divide: HP = 150000 ÷ 5252
Step 3: Result: HP ≈ 28.56
HP Conversion Chart
| Power (Watts) | Single Phase HP | Three Phase HP | Mechanical HP |
|---|---|---|---|
| 500 W | 0.67 HP | 0.70 HP | 0.67 HP |
| 746 W | 1.00 HP | 1.05 HP | 1.00 HP |
| 1000 W | 1.34 HP | 1.40 HP | 1.34 HP |
| 1500 W | 2.01 HP | 2.10 HP | 2.01 HP |
| 3000 W | 4.02 HP | 4.20 HP | 4.02 HP |
| 5000 W | 6.70 HP | 7.00 HP | 6.70 HP |
FAQs About HP Calculator
An hp calculator calculates horsepower from electrical or mechanical inputs. It supports single-phase, three-phase, and mechanical systems.
Use the formula: HP = (V × I × PF × Efficiency) ÷ 746
Use the formula: HP = (√3 × V × I × PF × Efficiency) ÷ 746
Single-phase uses one power line. Three-phase uses three lines and delivers higher efficiency and power.
Use: HP = (Torque × RPM) ÷ 5252 or HP = Watts ÷ 746
Three-phase systems use line-to-line voltage. The √3 factor adjusts power calculation correctly.
Power factor shows how efficiently electrical power converts into useful work. It affects horsepower results.
Yes. This hp calculator works for all types of motors, including single-phase and three-phase motors.