Speedometer Gear Calculator

Take advantage of our speedometer gear calculator tool that helps you to assist the size of the gear easily within microseconds. Using this calculator is very easy, just give the inputs like diameter, axle, and revolutions in the allocated input boxes and then click on the calculate button.

Speedometer Gear Calculator: Would you like to check your vehicle's speedometer gear? If yes, you are on the right platform. By using our calculator tool you can know the speed of the gear. And it is a user-friendly and free tool to use. Read on to know more detailed information about the concept like definitions, formulas, steps to calculate manually, and many more!!

What is Speedometer Gear?

This speedometer gear is a device that can be used to estimate the speed of moving objects like cars, lorries, bikes, and all vehicles and displays the output on the dashboard meant for the driver. This device was invented by Croatian professor Josip.

Speedometer Gear Formula

Here, we will look into the formula to calculate the number of teeth driven.

To calculate the revolutions per mile for the wheel.

Rev/mile = 20,168 / [tire diameter]

To calculate the number of teeth driven,

Number of Driven Teeth = [axle ratio * Number of drive teeth * rev/mile] / [1,001]

Steps to Calculate the Speedometer

Following are the simple steps to calculate the speedometer using the formula easily by hand.

  • Firstly, take the values from the problem.
  • Then, calculate the revolutions per mile.
  • After that, apply the formula for the number of driven teeth.
  • Substitute all the values in the formula and simplify the equation.
  • Finally, get the answer in seconds.

Example Problem for Speedometer Gear

Question: Find the size of the drive gear of the speedometer given with the tire size of 21 inches and the axle ratio is 4 with the no.of teeth on a driving gear is 35.

Solution:

Given, axle ratio = 4

no.of teeth on a driving gear = 35

diameter = 21 inches

Now calculate the revolutions using the formula,

Rev/mile = 20,168 / [tire diameter]

= 20168/21

Rev/mile = 960.38

Apply the formula of no. of teeth driven

Number of Driven Teeth = [axle ratio * Number of drive teeth * rev/mile] / [1,001]

= 4 * 35 * 960.38 / 1001

= 134  teeth.

Hence the value for no. of driven teeth is 134 teeth.

Stay connected with onlinecalculator.guide website for more biology calculator tools.

FAQs on Speedometer Gear Calculator

1. How to use this speedometer gear calculator?

All you need to do is give the inputs like axle ratio, diameter, and no.of driving teeth in the allocated input boxes and then hit the calculate button.

2. What is the formula for speedometer gear?

Formula for speedometer gear is, Number of Driven Teeth = [axle ratio * Number of drive teeth * rev/mile] / [1,001].

3. How to calculate the revolutions per mile?

To calculate the revolutions per mile, Rev/mile = 20,168 / [tire diameter].