What Is the Difference Between 120hz and 240hz?


Quick Answer

The difference, or subtraction, between120 hertz and 240 hertz is 120 hertz. These two frequencies are typically used to measure the refresh rate of high-definition televisions. Although in theory a higher refresh rate frequency is better, in actuality it makes little difference, explains PC Magazine.

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Full Answer

Generally, the frequency of a refresh rate refers to how many frames per second are displayed. One advantage of a high refresh rate is that it reduces the choppiness of fast lateral movement in the source image, found in many kinds of sports broadcasts.

Most source footage has a frame frequency of 24 to 60 hertz. To compensate for the difference between this source frequency and refresh rate on a display, many high-definition television interpolate created frames into the source footage.

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