When working with electrical motors and machinery, converting between horsepower (HP) and amperes (amps) is essential for estimating the current needed for your engine. This calculator allows you to quickly switch between HP to Amps and Amps to HP depending on your requirements.
How to Use?
Select the conversion type you need (HP to Amps or Amps to HP), input the necessary values such as horsepower or amperes, voltage, and efficiency, and click 'Calculate' to get the result. The calculator works based on the standard formulas for converting between HP and Amps.
Conversion Formula
HP to Amps Formula:
The formula for converting horsepower to amps is:
Amps = (HP × 746) / (Voltage × Efficiency)
For example, if you have a motor with 5 HP, 230 V, and 85% efficiency, the amps can be calculated as:
Amps = (5 × 746) / (230 × 0.85) = 19.2 Amps
Amps to HP Formula:
To convert amps back to HP, you can use the following formula:
HP = (Amps × Voltage × Efficiency) / 746
For example, if you have a motor drawing 19.2 amps at 230 V and 85% efficiency, the horsepower would be:
HP = (19.2 × 230 × 0.85) / 746 = 5 HP
Conversion Table for HP to Amps
| Horsepower (HP) | Voltage (V) | Efficiency (%) | Amps |
|---|---|---|---|
| 1 HP | 230 V | 85% | 3.75 Amps |
| 5 HP | 230 V | 85% | 19.2 Amps |
| 10 HP | 230 V | 85% | 38.4 Amps |
| 20 HP | 230 V | 85% | 76.8 Amps |
Examples of Amps to HP Conversion
- 19.2 Amps at 230 V with 85% efficiency: 5 HP
- 38.4 Amps at 230 V with 85% efficiency: 10 HP
- 76.8 Amps at 230 V with 85% efficiency: 20 HP
FAQs
1. Why is efficiency important?
Efficiency is a measure of how effectively a motor converts electrical energy into mechanical power. Without accounting for efficiency, the calculations for converting HP to Amps and vice versa will be inaccurate.
2. Can I use this calculator for any type of motor?
Yes, this calculator can be used for most common types of motors as long as you know the voltage and efficiency of the motor in question.