1. What Is Wheel RPM?

Wheel RPM (Revolutions Per Minute) measures how many complete rotations a wheel makes in one minute. It's an important parameter in vehicle dynamics, engineering, and physics calculations.

2. How Does The Calculator Work?

The calculator uses the Wheel RPM equation:

Where:

• \( Speed \) — Vehicle speed in kilometers per hour
• \( r \) — Wheel radius in meters
• \( \pi \) — Mathematical constant (~3.14159)

Explanation: The equation converts speed from km/h to m/min, then divides by the wheel circumference to get rotations per minute.

3. Importance Of Wheel RPM Calculation

Details: Wheel RPM is crucial for gear ratio calculations, torque analysis, speedometer calibration, and understanding vehicle performance characteristics.

4. Using The Calculator

Tips: Enter speed in km/h and wheel radius in meters. Both values must be positive numbers. For diameter measurements, divide by 2 to get radius.

5. Frequently Asked Questions (FAQ)

Q1: How does wheel size affect RPM?
A: Larger wheels have lower RPM at the same speed compared to smaller wheels, as they cover more distance per rotation.

Q2: What's a typical wheel RPM range for cars?
A: At highway speeds (100 km/h), typical car wheels rotate at about 800-1200 RPM depending on wheel size.

Q3: How accurate is this calculation?
A: It provides theoretical RPM. Actual RPM may vary slightly due to tire deformation, slippage, or load conditions.

Q4: Can I use diameter instead of radius?
A: Yes, but remember to divide diameter by 2 before entering the value (radius = diameter/2).

Q5: Does this work for any wheeled vehicle?
A: Yes, the formula applies to bicycles, cars, trucks, etc., as long as you use consistent units.