1. What is a Cycling RPM to MPH Calculator?

Definition: This calculator converts cycling cadence (RPM) to speed (MPH) based on your bike's tire diameter.

Purpose: It helps cyclists understand their speed based on pedaling rate and bike setup, useful for training and gear selection.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( S \) — Speed (miles per hour)
• \( RPM \) — Pedal revolutions per minute
• \( \pi \) — Pi (~3.1416)
• \( TD \) — Tire diameter (inches)
• 1056 — Conversion factor (inches to miles and minutes to hours)

Explanation: The formula calculates how much distance the bike travels per pedal revolution based on tire circumference, then converts this to miles per hour.

3. Importance of RPM to Speed Conversion

Details: Understanding this relationship helps cyclists optimize their cadence for efficiency, maintain consistent speeds, and select appropriate gear ratios.

4. Using the Calculator

Tips: Enter your cycling cadence (RPM) and your bike's tire diameter in inches. Typical road bike tires are 26-29 inches in diameter.

5. Frequently Asked Questions (FAQ)

Q1: What is a good cycling RPM?
A: Most cyclists maintain 80-100 RPM for efficient pedaling, though this varies by rider and terrain.

Q2: How do I measure my tire diameter?
A: Measure from ground to axle center and double it, or check your tire specifications (e.g., 700x25c is ~27 inches).

Q3: Does gear ratio affect this calculation?
A: The formula accounts for gear ratio through the RPM input (your actual pedal rate).

Q4: Why is the conversion factor 1056?
A: It combines inch-to-mile (63360) and minute-to-hour (60) conversions: 63360/60 = 1056.

Q5: Can I use this for stationary bikes?
A: Yes, if you know the simulated "tire diameter" or wheel circumference used by the stationary bike's computer.