Distilled white vinegar may not have the same flavor as rice vinegar but can be a practical last-minute substitute.
A 1:1 ratio for the sub can suit most dishes.
A little note, though, is that rice wine vinegar is sweeter—so if you use white wine vinegar in salad dressings and marinades in place of rice vinegar, you may want to add a little sugar or any sweetener choice to help bring the flavor closer.