Enter your Minimum CVT Ratio, Maximum CVT Ratio, Final Drive Ratio, Tire Diameter, Engine RPM, and preferred Speed Units to calculate your CVT Ratio Spread — plus your Maximum Speed, Minimum Speed, Overall Maximum Ratio, and Overall Minimum Ratio across your transmission's full operating range.
CVT Ratio Spread
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Maximum Speed
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Minimum Speed
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Overall Maximum Ratio
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Overall Minimum Ratio
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CVT ratio spread is the difference between the maximum and minimum transmission ratios, indicating how wide the gear range is. A higher spread provides better acceleration and top speed capabilities.
CVT gear ratios are calculated by dividing the output speed by the input speed. The overall ratio includes both the CVT ratio and the final drive ratio for complete drivetrain analysis.
Unlike traditional transmissions with fixed gear ratios, CVTs provide infinite variability between minimum and maximum ratios, allowing for optimal engine operation and fuel efficiency.
CVT performance is affected by the ratio spread, final drive ratio, tire size, and engine characteristics. Wider ratio spreads provide better acceleration and top speed potential.
The final drive ratio multiplies the CVT ratio effect. Higher final drive ratios improve acceleration but reduce top speed, while lower ratios do the opposite.
A typical CVT ratio spread ranges from 4:1 to 7:1. Higher spreads (6:1 or more) are better for performance applications, while moderate spreads work well for fuel economy.