Out of lemon? For 1 tablespoon lemon juice, use 1 tablespoon lime juice or 1/2 tablespoon vinegar. Not for canning or preserving.
1 tbsp lemon juice = 1 tbsp lime juice (or 1/2 tbsp vinegar)
Good for dressings and sauces. The flavor and acidity aren’t the same, so taste as you go. Do not swap acids in canning or preserving recipes.