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Electric Vehicle Road Speed Calculator

This calculator requires the use of Javascript enabled and capable browsers. This script determines the approximate road speed possible from an electric vehicle, based on the motor's published RPM (determined from the full battery voltage), the drive gear (or chain or belt) ratio, and the diameter of the road power wheel. You may also print the page by clicking on the Print button.

Required Data Entry
Motor Speed RPM
Final Reduction Drive (Gear) Ratio To 1
Road Wheel Diameter

Calculated Results
Road Speed kmph
Road Speed mph
Version 1.4.2

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