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Feet per Minute to RPM Calculator | Convert FPM with Formula (SFM/RPM)

Convert Feet per Minute (FPM) to RPM instantly with our Feet per Minute to RPM Calculator. Calculate rotational speed for conveyor belts, machining spindles, or industrial rollers using the formula RPM = (FPM × 12)/(π × diameter). Input FPM and diameter in inches, feet, or meters for precise results.

Ideal for engineers and technicians optimizing linear-to-rotational motion in mechanical systems.

Feet per Minute to RPM Calculator - Convert FPM to RPM using linear speed and diameter of the rotating object.

Formula for Converting Feet per Minute to RPM

To convert FPM to RPM, you need to know the circumference of the rotating object. Here’s the step-by-step formula:

  1. Calculate Circumference:
    Use the formula:
    Circumference = Diameter × π
  2. Convert FPM to RPM:
    Divide the Feet per Minute by the circumference (in feet):
    RPM = FPM ÷ Circumference

Feet per Minute to RPM Calculator

Follow these steps to calculate RPM from your linear speed:

  1. Enter the linear speed in Feet per Minute (FPM)
  2. Input the diameter of your rotating object (in inches)
  3. Click "Calculate" to get your speed in RPM (Revolutions Per Minute)

For reverse calculations, try our RPM to Feet per Minute Calculator.

Example Calculation

Let’s calculate RPM for an object traveling at 500 FPM with a diameter of 24 inches:

  1. Convert Diameter to Feet:
    Since the circumference is calculated in feet, first convert the diameter to feet:
  2. Calculate Circumference:
    Use the formula:
  3. Convert FPM to RPM:
    Divide the FPM by the circumference:

Common FAQs About

Q: Do I need any other measurements besides FPM and diameter?

A: No, you only need the linear speed in feet per minute (FPM) and the diameter of your rotating object in inches to calculate RPM.

Q: What if my diameter is in feet instead of inches?

A: Simply multiply your diameter in feet by 12 to convert it to inches before using the calculator. For example, 2 feet = 24 inches.

Q: Can I use this calculator for different types of circular motion?

A: Yes, this calculator works for any rotating circular object where you know both the linear speed (FPM) and diameter, from small pulleys to large industrial rollers.

Q: Is there a maximum or minimum speed limit for the calculation?

A: No, the calculator can handle any realistic FPM value. However, remember that very high speeds may require special consideration for real-world applications.

Conclusion

This Feet per Minute to RPM Calculator provides a straightforward and efficient way to convert between linear speed (FPM) and rotational speed (RPM). Understanding this conversion is essential in numerous mechanical and industrial applications, from optimizing conveyor belt speeds to determining precise spindle speeds in machining.

Whether you need a quick calculation or a deeper understanding of the relationship between FPM and RPM, this tool and the information provided here are designed to help.

FPM to RPM Calculator

Convert surface speed in feet per minute (FPM) to rotational speed in revolutions per minute (RPM) based on diameter.