Stopwatch

As stopwatch; this model was common in the 1960s.

A stopwatch is a tool used to measure the amount of time something takes. For example, to learn how soon a car can reach 60 miles per hour, or how much time it takes a runner to run 40 yards. These days, stopwatches are even installed in digital watches. You press a button to start the time and press it again to stop the time. A stopwatch can tell you the time in seconds, hundredths of a second, or thousandths of a second.

Stopwatch Media

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  Focus stack of a vintage stopwatch. Focus stack of 25 pictures with Helicon Focus.

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  Sped-up stopwatch animation. The text below the image shows the time that corresponds to the movement of the indicator around the stopwatch.

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  The first ever chronograph. A chronograph combines the functions of a stopwatch and a standard watch.

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  Mechanical chronograph Omega Speedmaster having two buttons (start/stop and reset) besides the crown

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  Chronograph with quartz movement and battery. The small red hand makes one revolvement per second, enabling a relatively high precision for time stopping operations.

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  Stopwatch function in a Casio digital wristwatch.

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  A digital stopwatch application on an Android device.