Nine times out of ten when you’re stuck hitting out of a bunker you’re looking to hit the ball just high enough to get it over the lip of the pit and on to the green. In other words, it’s less about the distance and more about the air.
If you don’t have a sand wedge in your golf bag you should use the next shortest club with the most loft available.
The best way to hit a good bunker shot is to be aware of what your clubface is doing. When you’re using a like your sand wedge it’s important to keep the face lofted so that it brushes across the sand and sends the golf ball upward.
Be careful not to do anything during your swing that will ruin the loft of the ball. It’s really easy to try and “help” the ball get into the air by moving your wrists or changing your angle. Trying moves like that will lead directly a bad shot.