Torque Calculator With Power

Torque Formula:

\[ T = \frac{P \times 60}{2 \times \pi \times RPM} \]

Torque (T):

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1. What is Torque Calculation?

Torque calculation from power and RPM is a fundamental concept in mechanical engineering that determines the rotational force produced by a motor or engine based on its power output and rotational speed.

2. How Does the Calculator Work?

The calculator uses the torque formula:

\[ T = \frac{P \times 60}{2 \times \pi \times RPM} \]

Where:

\( T \) — Torque (Nm)
\( P \) — Power (W)
\( RPM \) — Rotations per minute (rev/min)
\( \pi \) — Mathematical constant pi (approximately 3.1416)

Explanation: The formula converts power (work per unit time) to torque (rotational force) by accounting for the rotational speed and the conversion factors between different units of measurement.

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for designing mechanical systems, selecting appropriate motors and engines, and ensuring proper performance and efficiency in various applications from automotive to industrial machinery.

4. Using the Calculator

Tips: Enter power in watts (W), RPM in revolutions per minute. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for power and RPM?
A: Power should be entered in watts (W) and RPM in revolutions per minute (rev/min) for accurate results in newton-meters (Nm).

Q2: Can I use different power units?
A: Yes, but you'll need to convert to watts first. 1 horsepower = 745.7 watts, 1 kilowatt = 1000 watts.

Q3: Why is there a 60 in the numerator?
A: The factor of 60 converts minutes to seconds since power is measured in watts (joules per second) while RPM is in revolutions per minute.

Q4: What is the relationship between torque, power, and RPM?
A: For a given power, torque decreases as RPM increases, and vice versa. This is why high-torque applications often operate at lower RPMs.

Q5: Are there limitations to this calculation?
A: This calculation assumes constant power delivery and doesn't account for efficiency losses, friction, or other real-world factors that may affect actual torque output.