1. What is the RPM Calculation?

The RPM (Revolutions Per Minute) calculation converts running pace in miles per hour to revolutions per minute based on wheel circumference. This is useful for runners, cyclists, and mechanical applications where rotational speed needs to be calculated from linear speed.

2. How Does the Calculator Work?

The calculator uses the RPM formula:

Where:

• \( Speed\ mph \) — Speed in miles per hour
• \( Circumference \) — Wheel circumference in feet
• \( 88 \) — Conversion factor (mph to feet per minute)

Explanation: The formula converts speed in mph to feet per minute (by multiplying by 5280 feet/mile and dividing by 60 minutes/hour), then divides by circumference to get revolutions per minute.

3. Importance of RPM Calculation

Details: RPM calculation is important for optimizing running or cycling cadence, mechanical engineering applications, and understanding the relationship between linear and rotational speed.

4. Using the Calculator

Tips: Enter speed in miles per hour and wheel circumference in feet. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why is 88 used in the formula?
A: 88 is the conversion factor from mph to feet per minute (1 mph = 5280 ft/60 min = 88 ft/min).

Q2: How do I measure wheel circumference?
A: Measure the distance the wheel covers in one complete revolution, or calculate from diameter (Circumference = π × Diameter).

Q3: What is a typical running RPM?
A: For runners, RPM (steps per minute) typically ranges between 160-190 for efficient running.

Q4: Can I use this for cycling?
A: Yes, this calculation works for cycling when you know the wheel circumference and speed.

Q5: How does RPM relate to cadence?
A: In running and cycling, RPM is essentially the same as cadence (steps or pedal revolutions per minute).