Stepper Motor Calculator
A stepper motor calculator helps you calculate speed, timing, and power using real engineering formulas. It ensures precise motor control for CNC, robotics, and automation systems. Use this guide to understand and apply stepper motor calculations easily and accurately.
Stepper Performance Calculator
How to Use Stepper Motor Calculator
Follow these steps to use a stepper motor calculator effectively:
- Enter Applied Voltage (V): Input the supply voltage of the motor driver.
- Enter Maximum Current (Imax): Add the rated maximum current of the motor.
- Enter Inductance (L): Provide motor inductance in Henry (H) or millihenry (mH).
- Enter Steps per Revolution (spr): Example: 200 steps for a 1.8° motor.
- Click Calculate: The calculator will compute Maximum speed, Minimum time per step, and Maximum power.
- Analyze Results: Use results to optimize motor performance and driver selection.
How to Calculate Stepper Motor (Step-by-Step)
Key Formulas Used
Where V is Voltage, L is Inductance (H), Imax is Current (A), and spr is Steps per Revolution.
Example Calculation
Given:
- Voltage (V) = 24 V
- Maximum Current (Imax) = 2 A
- Inductance (L) = 0.005 H (5 mH)
- Steps per Revolution (spr) = 200
1. Calculate Maximum Speed:
Max Speed = 24 / (2 × 0.005 × 2 × 200) = 24 / 4 =
6 revolutions per second
2. Calculate Minimum Time per Step:
Time per step = (2 × 0.005 × 2) / 24 = 0.02 /
24 = 0.833 ms
3. Calculate Maximum Power:
Power = 2 × 24 = 48 W
Stepper Motor Conversion Chart
| Voltage (V) | Current (A) | Inductance (mH) | Steps/Rev | Max Speed (RPS) | Time/Step (ms) |
|---|---|---|---|---|---|
| 12 | 1.5 | 3 | 200 | 6.67 | 0.75 |
| 24 | 2 | 5 | 200 | 6.00 | 0.83 |
| 24 | 3 | 4 | 200 | 5.00 | 1.00 |
| 48 | 2 | 6 | 400 | 2.50 | 0.50 |
| 36 | 2.5 | 5 | 200 | 3.60 | 0.69 |
FAQs About Stepper Motor Calculator
It calculates speed, step timing, and power using voltage, current, inductance, and steps per revolution.
Inductance limits how fast current builds up, which directly affects motor speed.
It is the highest rotational speed the motor can achieve based on electrical limits.
It is the shortest time required for each step pulse to ensure proper motor operation.
Higher voltage increases speed and reduces step delay.
Yes. It helps optimize speed and precision in CNC and automation systems.
It can overheat and damage the motor or driver.
Yes. It helps select the correct power supply and ensures safe operation.
Use Henry (H). Convert mH to H by dividing by 1000.
It provides accurate estimates for most standard stepper motors when correct inputs are used.