Park the car on a level surface. Turn the car off. Let the oil drain back into the oil pan - 3 minutes should be enough when hot, 15 minutes when cold. Pull the dipstick out, wipe the oil off. Put the dipstick back in all the a\way. Pull it back out, look at the oil level on the end of the dipstick. It should be between the 2 marks. If not, add 1/2 quart, let it drain down a few minutes, wipe the dipstick and re-insert it. Take it out and read the level.
Most cars on the road are read that way. Porsche 911’s and some special Corvettes are not.