1. What is an RPM to MPH Calculator for Stationary Bikes?

Definition: This calculator converts pedal revolutions per minute (RPM) to miles per hour (MPH) based on your bike's tire diameter.

Purpose: It helps cyclists estimate their equivalent road speed when using a stationary bike or trainer.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The formula calculates the distance traveled per minute based on RPM and tire circumference, then converts to miles per hour.

3. Importance of RPM to MPH Conversion

Details: Understanding your equivalent road speed helps with training intensity, workout planning, and comparing indoor/outdoor performance.

4. Using the Calculator

Tips: Enter your cycling RPM and your bike's tire diameter (default 26 inches for standard road bike). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is tire diameter important?
A: Larger tires cover more distance per revolution, resulting in higher speed at the same RPM.

Q2: What's a typical RPM range for cycling?
A: Most cyclists maintain 60-100 RPM, with 80-90 RPM being an efficient cadence for many riders.

Q3: Does this account for resistance or incline?
A: No, this calculates equivalent speed on flat ground. Actual effort may vary with trainer resistance.

Q4: How do I measure my tire diameter?
A: Check the tire sidewall for size markings (e.g., "26x1.95" means 26" diameter) or measure from ground to axle and double it.

Q5: Why use 1056 as the conversion factor?
A: It combines 63360 inches/mile and 60 minutes/hour (63360/60 = 1056) to convert inches per minute to miles per hour.