What is Tachymeter On A Watch, And What Does It Do?

Watches have evolved significantly over the years, incorporating features that go beyond simply telling time. One such feature, often seen on chronograph watches, is the tachymeter. Although it may seem like just another number scale on the watch bezel, the tachymeter is a practical tool with a rich history and a specific purpose. 

Whether you’re a watch enthusiast or someone curious about the functionalities of different watch components, understanding the tachymeter can enhance your appreciation for timepieces. In this article, you will learn about the function of a tachymeter, how it works, and what you can measure with it. 

What is a Tachymeter on a Watch?

A tachymeter is a scale typically inscribed on the bezel of a chronograph watch. It allows the wearer to measure speed based on travel time or measure distance based on speed. The scale is calibrated to measure in units per hour, meaning it can be used to calculate the speed of a moving object over a known distance. For example, if you know the distance of a mile, the tachymeter can help you determine how fast you were traveling to cover that mile. This feature has made tachymeters popular among drivers, pilots, and anyone who needs to measure speed quickly and accurately. The tachymeter is a hallmark of precision and a tool that reflects the rich history of watchmaking.

How Does a Tachymeter Work on a Watch?

The tachymeter works by utilizing a simple formula that correlates time elapsed with speed or distance. The scale is usually marked from 500 to 60, representing speeds from 500 units per hour to 60 units per hour. To use a tachymeter, you would start the chronograph (a stopwatch feature on the watch) as you begin to measure the distance or speed. Once you complete the distance, you stop the chronograph. The position of the chronograph's second hand on the tachymeter scale will indicate the speed at which you traveled over the distance.

For instance, if it takes 30 seconds to travel a known distance, and the second-hand points to "120" on the tachymeter scale, this indicates that the speed was 120 units per hour. The tachymeter is a practical tool that can be used for a variety of measurements, making it a versatile feature on a chronograph watch.

What Types of Watches Feature Tachymeters?

Tachymeters are most commonly found on chronograph watches, which are known for their stopwatch functionality. The tachymeter scale is typically placed around the bezel or the outer edge of the dial, allowing it to be easily read while the chronograph is in use. Chronographs are a popular choice among those who appreciate the blend of technical precision and classic design. The inclusion of a tachymeter adds a layer of functionality, making these watches ideal for measuring speed or distance.

Racing Watches are another category where tachymeters are frequently featured. These watches are designed with motorsport enthusiasts in mind, offering tools that can calculate speeds over a measured distance. The tachymeter in racing watches is not just a practical tool but also a tribute to the history of motorsports, where precise timekeeping is essential.

In addition to chronographs and racing watches, pilot watches often include tachymeters. Pilots require accurate measurements of speed and distance, and the tachymeter provides a quick reference for these calculations. Pilot watches with tachymeters are usually robust, with larger dials for easy readability during flight.

Why Do Watches Have Tachymeters?

Tachymeters have been a significant feature on watches since the early 20th century. They were originally designed for use in fields like aviation and motorsports, where precise measurements of speed and distance were crucial. The introduction of tachymeters on wristwatches allowed professionals to perform these calculations on the go without needing additional instruments. For example, pilots used tachymeters to measure the speed of their aircraft, while race car drivers could calculate their average speed on a track.

In modern times, the tachymeter has evolved beyond its practical origins to become a symbol of sophistication and precision in watch design. While not everyone may use the tachymeter daily, its presence on a watch signifies a connection to the history of watchmaking and the pursuit of accuracy. It reflects a watch's capability to perform complex calculations, making it an attractive feature for collectors and enthusiasts who appreciate both the aesthetic and functional aspects of their timepieces.

How Do You Use a Tachymeter on a Watch?

Using a tachymeter on a watch is straightforward once you understand the process. Here is a step-by-step guide:

• Identify a Known Distance or Speed: To use the tachymeter, you need to know either the distance you will cover or the speed you will maintain. For instance, if you are measuring speed, ensure you have a fixed distance, like a mile or kilometer.

• Start the Chronograph: Begin timing as you start your journey over the known distance. Press the chronograph button to start the stopwatch function on your watch.

• Complete the Distance: Travel the known distance. As soon as you reach the end of the distance, stop the chronograph by pressing the button again.

• Read the Tachymeter Scale: Look at where the chronograph's second hand points on the tachymeter scale. The number indicated will show your speed in units per hour. For example, if the second hand points to "120" and you traveled one mile, your speed was 120 miles per hour.

What Are the Benefits of Having a Tachymeter on Your Watch?

A tachymeter adds several benefits and functionalities to your watch, making it more than just a timekeeping device. First and foremost, it allows you to perform quick calculations related to speed and distance without needing additional tools. This can be particularly useful in situations where precision is important, such as timing laps on a race track or determining travel speed over a fixed distance.

Additionally, the presence of a tachymeter enhances the overall aesthetic of the watch, giving it a more technical and sophisticated appearance. It reflects the watch's heritage and connection to fields that require precision, such as motorsports and aviation. For collectors and enthusiasts, a tachymeter signifies a well-rounded timepiece that combines style with functionality.

Moreover, the tachymeter serves as a conversation starter and a unique feature that sets a watch apart from others. Even if you don’t use it regularly, having a tachymeter on your watch is a nod to the craftsmanship and innovation that has gone into its design, making it a valuable addition to any collection.

Are Tachymeter Watches Expensive?

The cost of tachymeter watches can vary significantly depending on the brand, materials used, and the watch's overall craftsmanship. Traditionally, tachymeter watches have been associated with luxury brands and high-end timepieces, often making them quite expensive. For example, well-known luxury brands like Rolex, Omega, and TAG Heuer offer tachymeter watches that can range from a few thousand dollars to well over $10,000. These watches are not only priced for their functionality but also for their brand prestige, meticulous craftsmanship, and use of premium materials.

However, if you’re looking for a more affordable option without compromising on style or functionality, the All-Black Motorsport Richard Mille Homage-Inspired Style Watch from Asorock is an excellent choice. Priced at just $185, this watch offers a stylish design inspired by luxury models and includes a functional tachymeter, making it accessible to a broader audience. While it may not carry the same brand prestige as Rolex or Omega, Asorock’s homage watch provides a great alternative for those who admire the look and utility of high-end tachymeter watches but prefer a more budget-friendly option.

Conclusion

Tachymeter watches offer a unique blend of functionality and style, making them a valuable tool for professionals and enthusiasts alike. From their historical roots in motorsports and aviation to their continued relevance in modern watchmaking, tachymeters serve as a testament to the precision and craftsmanship that go into creating a quality timepiece. Whether you’re using it to measure speed or simply appreciate its aesthetic appeal, a tachymeter adds a distinctive element to your watch, enhancing both its utility and its design. 

Brands like Rolex, Omega, and TAG Heuer have set the standard for tachymeter watches, but more affordable options like Asorock provide similar functionality without the high price tag. Ultimately, whether you’re a collector, a racer, or someone who values the intricate features of a well-made watch, a tachymeter watch is a timeless addition to any collection.