We are independent & ad-supported. We may earn a commission for purchases made through our links.

Advertiser Disclosure

Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.

How We Make Money

We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently from our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What is a Speedometer?

By Matthew F.
Updated May 23, 2024
Our promise to you
WikiMotors is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At WikiMotors, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

A speedometer is the device in a vehicle that measures and displays the speed, and is essential for safety purpose on roads and highways around the world. The speedometer on a car, truck or motorcycle tells the driver how fast the vehicle is moving at any given time by instantaneously measuring the speed on the ground. The device is now digital on many vehicles, and takes different incarnations as the motorcycle speedometer or bike speedometer.

Though the speedometer came to be seen as standard by the end of the 20th century, the device was not required on vehicles in the early 1900s. The car speedometer became standard in 1910, still in the infancy of the automobile, and has been a mainstay ever since. The regular speedometer and motorcycle speedometer have both maintained staying power on the dashboard of the vehicle and positioned within clear sight of the driver.

Many of these devices are situated right behind the steering wheel on your car, and can be read with a quick glance down from the road. Some are digital, and can be read with two or three numbers reflecting your speed; while others require a rotating arm like a clock. On most cars, the arm moves from the low speed on the left to the higher speeds on the right. Many of these speedometers reflect speeds from zero miles per hour to as high as 140 miles (225 km) per hour; while others stop around the safe limit of 90 miles (145 km) per hour.

Invented in 1888 by the Croatian scientist Josip Belusic and first called a velocimeter, the speedometer has been seen on various other forms of transportation as well. The digital speedometer on an airplane is called a airspeed indicator, while the one on a boat is referred to as the pit log.

Speedometers have an error tolerance of around 10% as the car and the device both age. The device is read by a flexible cable that is attached to the car’s transmission, which indicates how quickly the vehicle is moving. More recent electronic speedometers are fitted with magnets and field sensors to the drive shaft to deliver to the driver the speed of the vehicle. Even on bicycles, speedometers measure the time between the revolutions of the wheel to tell the rider how fast they are going.

WikiMotors is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.

Discussion Comments

WikiMotors, in your inbox

Our latest articles, guides, and more, delivered daily.

WikiMotors, in your inbox

Our latest articles, guides, and more, delivered daily.