What is the ratio for substituting lemon juice vinegar?

The general substitution ratio is 1 tablespoon of lemon juice for every 1/4 cup of vinegar. However, this ratio may vary depending on the acidity of the lemon juice and the desired taste. For a milder flavor, use less lemon juice; for a stronger flavor, use more lemon juice. Additionally, some recipes may call for a combination of lemon juice and vinegar, so it is important to adjust the ratio accordingly.