Best car gear guide

How to Calculate Car Gear Ratio

Have you ever wondered how to calculate the gear ratio for your car? Wondering what that number is in the manual your dad just passed down to you? Well, wonder no more – we’re here to help! In this article, we’ll teach you everything you need to know about gear ratio calculators, and how they can help you out while driving.

What is a Gear Ratio?

Gear ratios are the number of gears in a gearbox, and they determine the speed at which a vehicle can move. A gear ratio is simply the number of teeth on the gear that’s being used to move the vehicle.

There are many different gear ratios that can be found on vehicles, and they all have different purposes. Some gear ratios are used for cruising, while others are used for performance driving.

There are two main types of gearboxes: manual and automatic. Manual gearboxes require you to use your hands to change the gears, while automatic gearboxes do it for you.

To calculate the gear ratio for a car, you need to know the size of the engine, the size of the transmission, and the size of the wheels. You can also find Gear Ratio calculators online to make it easier for you.

Types of Gears

When you’re working on your car’s gear ratio, there are a few different types of gears to be aware of. Here’s a quick overview of each:

1st Gear: This is the lowest gear in your car, and it’s usually reserved for when you’re just starting out or when you’re going around a small corner. It has a very low ratio, meaning that it takes a lot of torque to get up to speed.
2nd Gear: This is the next higher gear, and it has a much higher ratio than 1st Gear. The advantage of having a high ratio in 2nd Gear is that it allows you to go faster without using as much torque, making it ideal for long drives or when you need to keep up with traffic.
3rd Gear: This is the highest gear in your car, and it has the highest ratio of all the gears. When you’re in 3rd Gear, you’re able to go very fast without using much power at all.

How to Calculate Gear Ratio

Gear ratio is a way to measure the efficiency of a gear system. Gear ratio is defined as the nominal gear size divided by the Actual gear size. The smaller the number, the more efficient the gear system.

There are many different factors that can affect gear ratio including wheel size, axle size, and motor type. To find your car’s gear ratio, you’ll need to gather some information about your vehicle. You’ll need your vehicle’s make, model, and engine displacement (in cubic inches). You can also find this information in your owner’s manual or online.

Once you have this information, you can use formulas to calculate your car’s gear ratio. The formulas used to calculate gear ratio are based on torque and speed. Torque is measured in foot-pounds (lbs), while speed is measured in rpm (revolutions per minute). To find your car’s torque output (in foot-pounds), multiply your engine displacement by 1000. To find your car’s speed (in rpm), divide your engine displacement by 1000.

For example, if you have an engine displacement of 2 liters and you want to know your car’s gear ratio, you would use the following equation:


Gear ratio is a key concept when it comes to calculating the weight of your vehicle and choosing the right gear for the road. In this article, we will provide you with an overview of Gear Ratio, as well as give you a formula to calculate it. By following these simple steps, you will be able to choose the correct gears for your driving conditions, making your journey more comfortable and efficient.

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