1. What is RPM From Gear Ratio Calculator?

Definition: This calculator determines the output RPM based on engine RPM and gear ratio.

Purpose: It helps automotive engineers, mechanics, and enthusiasts understand how gear ratios affect rotational speed.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \text{RPM} \) — Output rotational speed (revolutions per minute)
• \( \text{RPM}_{\text{engine}} \) — Engine rotational speed (RPM)
• \( \text{GR} \) — Gear ratio (unitless)

Explanation: The gear ratio represents how many times the input shaft must rotate to make the output shaft rotate once.

3. Importance of RPM Calculation

Details: Proper RPM calculation ensures optimal power delivery, fuel efficiency, and mechanical longevity in vehicles and machinery.

4. Using the Calculator

Tips: Enter the engine RPM and gear ratio (must be > 0). The calculator will show the resulting output RPM.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical gear ratio range?
A: Common gear ratios range from 2:1 to 5:1 for most vehicles, with lower ratios providing more torque and higher ratios offering more speed.

Q2: How does this relate to vehicle speed?
A: Final speed depends on both RPM and wheel/tire size. Use this RPM with a wheel speed calculator for complete speed calculation.

Q3: What if I have multiple gear reductions?
A: Multiply successive gear ratios together to get the total ratio before dividing the engine RPM.

Q4: Does this account for torque converter slip?
A: No, for automatic transmissions, you may need to account for additional slip percentage (typically 2-10%).

Q5: How precise should my gear ratio measurement be?
A: For accurate results, use gear ratio specifications from manufacturer documentation when available.