A display apparatus includes a display panel, a gate driver, a counter and a power generator. The display panel includes a gate line and a pixel electrically connected to the gate line. The gate driver is configured to set a voltage level and an output timing of a gate signal applied to the gate line based on a gate driving voltage and a first control signal. The gate driving voltage includes a gate on voltage and a gate off voltage. The counter is configured to increase a count value based on the first control signal. The power generator is configured to adjust a level of the gate driving voltage based on the count value.