Enter the scanning frequency and the number of horizontal lines into the Refresh Rate Calculator. The calculator will evaluate the Refresh Rate.

## Refresh Rate Formula

The following two example problems outline the steps and information needed to calculate the Refresh Rate.

RFR = HF / (HL * 1.05)
• Where RFR is the Refresh Rate (hz)
• HF is the scanning frequency
• HL is the number of horizontal lines

To calculate the refresh rate, divide the scanning frequency by the product of the number of horizontal lines times 1.05.

## How to Calculate Refresh Rate?

The following example problems outline how to calculate Refresh Rate.

Example Problem #1:

1. First, determine the scanning frequency.
• The scanning frequency is given as: 96,000.
2. Next, determine the number of horizontal lines.
• The number of horizontal lines is provided as: 1024.
3. Finally, calculate the Refresh Rate using the equation above:

RFR = HF / (HL * 1.05)

The values provided above are inserted into the equation below and computed.

RFR = 96,000 / (1024 * 1.05) = 89.285 (hz)

Example Problem #2:

For this problem, the variables required are provided below:

scanning frequency = 80,000

number of horizontal lines = 1000