1 Cup Lemon Juice in Grams
1 cup of lemon juice weighs 244 g (poured, USDA). Freshly squeezed lemon juice, sharp and acidic. All the figures on this page are approximate conversions based on the USDA value, so when a recipe really matters, verify with a kitchen scale.
Lemon juice is a sharp, acidic liquid, and a cup of it weighs 244 g, the same as a cup of milk. It is used in dressings, marinades, baking and drinks, where its acidity brightens flavours, tenderises meat, activates baking soda and stops cut fruit from browning. Fresh lemon juice and bottled lemon juice weigh the same, but they taste different: fresh juice is brighter and more complex, while bottled juice is flatter and sometimes has a slightly bitter edge from the preservatives. For baking and for dressings, fresh juice is worth the effort of squeezing, and the weight on this page applies to either.
Lemon Juice cups to grams conversion table
| Cups | Grams | Tablespoons |
|---|---|---|
| 1/4 cup | 61 g | 4 |
| 1/3 cup | 81.3 g | 5.3 |
| 1/2 cup | 122 g | 8 |
| 2/3 cup | 162.7 g | 10.7 |
| 3/4 cup | 183 g | 12 |
| 1 cup | 244 g | 16 |
| 1 1/2 cups | 366 g | 24 |
| 2 cups | 488 g | 32 |
| 3 cups | 732 g | 48 |
| 4 cups | 976 g | 64 |
One tablespoon of lemon juice weighs about 15.2 g, and a cup is 16 tablespoons, so the tablespoon column is simply the cup weight divided by 16. For small amounts, a scale that reads to the gram is far more reliable than a spoon, because a heaped tablespoon can weigh half as much again as a level one. All the values in this table are approximate, and they assume the ingredient is measured poured, exactly as the source measured it.
Why a scale beats a cup for lemon juice
Liquids are the most forgiving ingredients to measure in cups, because a cup of water weighs 237 g and most water-based liquids are within a few grams of that. But they are not all the same: a cup of orange juice weighs 248 g, a cup of coconut milk 240 g, and a cup of soy sauce 255 g, so the differences add up in large batches. Liquids also change with temperature, because warm liquids expand slightly, and with dissolved solids, because sugar, salt and pulp all add weight. In baking, liquid is half of the hydration ratio, and getting it right is what makes dough workable and batters pourable. Weighing liquids is the fastest way to measure them: put the bowl on the scale, tare it, and pour to the number, with no jug to wash and no meniscus to read.
Worked examples
A lemonade for a hot day
A jug of lemonade that calls for 1 cup of lemon juice needs 244 g, mixed with sugar and water to taste. The juice is the sour backbone of the drink, and the sugar is there to balance it, so taste the lemonade and adjust the sugar rather than following the recipe blindly, because lemons vary in acidity. Fresh juice makes a noticeably better lemonade than bottled juice, and rolling the lemons on the counter before squeezing helps release more juice.
A salad dressing
A vinaigrette that uses 1/4 cup of lemon juice needs 61 g, whisked with olive oil, mustard and honey. The acid in the lemon juice is what makes the dressing bright and lively, and it also helps the dressing emulsify, because the acid stabilises the mixture of oil and water. Whisk the lemon juice and mustard first, then add the oil in a slow stream, and the dressing will thicken and hold together.
Baking with lemon juice
A cake that calls for 1/3 cup of lemon juice needs 81.3 g, and the juice does two jobs in the batter: it adds flavour, and its acidity reacts with baking soda to give the cake lift. That reaction starts as soon as the juice meets the soda, so get the cake into the oven quickly once the batter is mixed. If the batter sits around, the reaction spends itself and the cake bakes flat, which is the most common reason a lemon cake comes out dense.
How the weight was measured
poured means filling the cup with a spoon rather than plunging the cup into the bag or jar, then sweeping a straight knife across the top to level it off. Never scoop, and never tap the cup down, because both pack the ingredient and add weight. The difference between a spooned cup and a scooped cup can be 15 to 25 percent, which is enough to change a bake from tender to tough, so the method matters as much as the number. The source for the figure on this page is USDA, and the confidence in the value is medium. USDA publishes a standard ingredient weight chart that recipe developers use as a reference, and this page follows that chart rather than any single cookbook. Where the chart gives a range or a note, we say so plainly instead of hiding the uncertainty. All the figures here are approximate conversions: natural ingredients vary by brand, variety, moisture and how finely they are chopped or ground, so when a recipe really matters, verify the weight with a kitchen scale.
Common mistakes
The most common mistake is reading the jug from above while holding it in the air, which distorts the level by a tablespoon or more. Always set the jug on a flat surface and crouch to eye level. The second is measuring a hot liquid in a plastic jug, which can flex and throw the level off, and measuring a cold liquid straight from the fridge in a recipe that expects room temperature. The third is forgetting to stir liquids that separate, such as coconut milk, stock with sediment, or juice with pulp, so the first pour is thin and the last pour is thick. And the fourth is measuring sticky or pulpy liquids in a dry cup, where a film clings to the sides and never makes it into the bowl.
When this conversion matters most
This conversion matters most in baking and in large-batch cooking, where liquid is a large share of the recipe and small errors scale up. In bread, a 20 g error in water changes the hydration by several percentage points, which is the difference between a dough that holds its shape and one that spreads. It matters less in a single drink or a dressing, where taste is the guide and you can adjust. It matters again when a recipe is written in grams and you are converting it to cups: knowing that a cup of the liquid is not always 237 g stops you from adding too much of a denser liquid. And it matters for scaling: doubling a liquid by weight is exact, while doubling by volume doubles the reading error.
What to do if you do not have a scale
If you do not have a scale, use a liquid measuring jug with clear markings, set it on a flat counter, and read the level at eye level using the bottom of the meniscus. Pour slowly as you approach the line, because it is easy to overshoot and hard to pour back cleanly. For small amounts, use measuring spoons rather than guessing a fraction of a cup. Liquids are the one category where cups work reasonably well, because density varies little, but weighing is still faster and cleaner, and it lets you measure straight into the mixing bowl.
Storing lemon juice
Refrigerate fresh juice; use within 1 week. Keeping lemon juice properly stored matters for the conversion as well as for the flavour: an ingredient that has absorbed moisture from the air weighs more per cup than a dry one, and one that has dried out weighs less. Store it in an airtight container, away from heat and light, and measure it in the state the recipe expects, not straight from a damp or stale bag.
Frequently asked questions
Is fresh lemon juice the same weight as bottled lemon juice?
Yes, by weight they are essentially the same: a cup of either weighs about 244 g. The difference is in flavour, not in weight. Fresh lemon juice is brighter, more aromatic and more complex, while bottled juice is flatter and can have a slightly bitter edge. For baking and for dressings, where the lemon flavour is the point of the dish, fresh juice is worth squeezing. For a marinade or a cleaning solution, bottled juice is fine.
How many lemons make a cup of juice?
It varies too much to give a reliable number, because lemons differ in size, variety and juiciness, and the season and the ripeness matter as well. A large, heavy, thin-skinned lemon gives far more juice than a small, thick-skinned one, and a lemon that has been rolled on the counter before squeezing gives more than one that has not. Weigh the juice as you squeeze it and stop when the scale reads 244 g, rather than counting lemons.
Can I use cups instead of a scale for lemon juice?
Yes, but a scale is more accurate. If you measure lemon juice poured, exactly as the figure on this page was measured, a cup will be close to 244 g, within a few grams. The problem is that most people scoop rather than spoon, which can add 15 to 25 percent to the weight, and that error is enough to change a bake. For everyday cooking, cups are fine. For baking, where the ratio of ingredients decides the result, weigh it and check the number on the scale.
How many tablespoons are in a cup of lemon juice?
There are 16 tablespoons in a US cup, so a cup of lemon juice is 16 tablespoons, and one tablespoon weighs about 15.2 g. A teaspoon weighs about 5.1 g. Tablespoons are useful when a recipe calls for a small amount, but they carry the same packing problem as cups: a heaped tablespoon can weigh half as much again as a level one, so level every spoon with the back of a knife, and use a scale for small amounts when accuracy matters.
Does the weight change if I pack or sift lemon juice?
Packing does not apply to lemon juice, because it is poured rather than spooned. The weight is consistent as long as the liquid is measured at eye level in a jug and the ingredient is stirred first if it separates. Temperature makes a small difference, because warm liquids expand slightly, but for ordinary kitchen use the poured weight is stable, and a cup of lemon juice weighs about 244 g whether it is cool or at room temperature.