how many grams in a cup of lemon juice?

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things people ask

• How many lemons do I need for one cup of juice?
  Plan on 4-5 medium lemons for a cup. A medium lemon gives roughly 3 tablespoons (about 45 ml) of juice, so the math lands between 4 and 6 depending on size, ripeness, and how aggressively you roll and squeeze. Buy one extra — under-juicing a curd or bars recipe is harder to fix than having a spare lemon.
• Can I use bottled lemon juice for lemon curd or lemon bars?
  You can, but the result tastes flatter. Bottled juice loses the volatile oils that live in fresh peel and the upper layer of fresh juice, and curd or bars rely on that aromatic top note to balance the sugar. If you must use bottled, add a teaspoon of fresh zest per cup to recover some of the brightness.
• Does lemon juice weigh the same as water by the cup?
  Almost. Water is 240 g per cup; lemon juice is 224 g because of dissolved sugars, citric acid, and pulp solids that change the density slightly. For most marinades and lemonades the difference is irrelevant, but for hydration-sensitive recipes like macarons or meringues built on a lemon syrup, weigh it.

related conversions

• Lemon Juice: tablespoons to grams
• Lemon Juice: teaspoons to grams
• Lemon Juice guide