Gear Ratio Speed Calculator
Calculate the speed of a vehicle based on gear ratio, tire diameter, and engine RPM. Useful for automotive enthusiasts, mechanics, and engineers.
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How to use this tool?
- 1 Enter the requested data in the fields above carefully.
- 2 Click the calculate button to process the information instantly.
- 3 Analyze the detailed result and the formula explanation presented below.
- 4 You can print, share, or even embed the calculator on your own site for free.
Unlike traditional static calculators, our tools adapt to specific user needs. They include detailed explanations of the formulas used, ensuring transparency in results. Furthermore, our design is focused on user experience, eliminating distractions and focusing on what really matters: your data and conclusions.
Previous Results
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Frequently Asked Questions
The formula is: Speed (mph) = (Engine RPM × Tire Diameter in inches) / (Gear Ratio × Final Drive Ratio × 336). The constant 336 converts inches per minute to miles per hour.
Engine RPM is in revolutions per minute, tire diameter is in inches, and the result is in miles per hour (mph). Gear ratios and final drive ratios are unitless.
Yes, as long as you have the correct values for RPM, gear ratio, tire diameter, and final drive ratio. It works for cars, motorcycles, and other wheeled vehicles.
All inputs must be positive numbers. If you enter zero or a negative number, the calculator will display an error and ask you to correct the input.
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