Gear Ratio Calculator
Calculate vehicle speed at any RPM based on tire size, axle ratio, and transmission gear. Perfect for gear selection and engine tuning.
Quick Presets
Results
Enter drivetrain specs to calculate speed and RPM
Speed at Entered RPM
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Overall Gear Ratio
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Torque Multiplier
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RPM at Highway Speeds
RPM at 60 mph
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RPM at 70 mph
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Tire Revolutions per Mile
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