1/2 Cup Lemon Juice in Grams
1/2 cup of lemon juice weighs 122 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.
Freshly squeezed lemon juice, sharp and acidic. It is used for dressings, marinades, baking and drinks. That range of uses is part of why the conversion comes up so often: the same ingredient appears in everyday cooking and in precise baking, and the two situations demand different levels of accuracy. Knowing the weight of half a cup, rather than guessing from a measuring cup, keeps the result consistent no matter which recipe you are following.
Why weighing half a cup of lemon juice beats measuring it in cups
Liquids look easy to measure, but 1/2 cup of lemon juice weighs 122 g, and that number is more useful than the volume alone. A cup measure tells you how much space the liquid takes up; a weight tells you how much of it there is, and the two are only the same for water. For every other liquid the weight per cup is different, which is why a recipe written in grams cannot be followed with cups alone. Weighing 122 g on a scale is also faster than finding a jug, pouring to the line at eye level, and cleaning the jug afterwards.
Lemon Juice cups to grams conversion table
| Cups | Grams (approx.) |
|---|---|
| 1/4 cup | 61 g |
| 1/3 cup | 81.5 g |
| 1/2 cup | 122 g |
| 2/3 cup | 162.5 g |
| 3/4 cup | 183 g |
| 1 cup | 244 g |
| 1 1/2 cups | 366 g |
| 2 cups | 488 g |
| 3 cups | 732 g |
One tablespoon of lemon juice weighs about 15 g, and one teaspoon about 5 g. 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. The table is rounded to the nearest half gram, so the numbers are approximate by design; the half-cup figure of 122 g is the one to use when a recipe calls for half a cup.
How the weight was measured
Poured means pouring the ingredient into a liquid measuring jug on a flat surface and reading the level at eye level. Liquids level themselves, so there is no spooning or levelling involved, and the weight follows directly from the volume and the density.
The source for the 244 g per cup figure 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 it exactly rather than averaging across sources, because an average of two different measuring methods is a number that matches nobody's cup.
Because lemon juice is measured poured, the weight per cup is stable from one kitchen to the next, and the 122 g figure for half a cup is a reliable default. Small differences in brand or temperature shift it by only a gram or two, which is far below the threshold that changes a recipe.
All the figures on this page are approximate conversions. When a recipe really matters, verify with a kitchen scale: weigh the ingredient directly into the bowl on a tared scale and trust that number over any cup.
Worked examples
A soup or stock-based sauce
A soup recipe calling for 1/2 cup of lemon juice needs 122 g. Weighing the liquid means the soup has exactly the right consistency, because the liquid decides how thick the finished dish is. If the recipe is doubled for a crowd, use 244 g for 1 cup and the second pot will match the first.
Halving a cake batter
Halving a cake that asks for 1 cup of lemon juice leaves you with 1/2 cup, or 122 g. A half-cup measure in a jug is easy to misread, so weighing 122 g is the reliable way to halve a recipe without the batter turning out too wet or too dry.
A marinade for the grill
A marinade needing 1/4 cup of lemon juice takes about 61 g. Weighing such a small amount is far more reliable than eyeballing a quarter-cup measure, and it keeps the marinade balanced.
When this conversion matters most
This conversion matters most in baking and bread-making, where lemon juice controls hydration and therefore texture. A cake, a custard or a loaf has no room for a 10 g error, and the smaller the recipe the bigger the error looks as a percentage. It also matters when you are following a recipe from another country, because most of the world cooks in grams and a cup is an American habit. Converting to grams lets you use any recipe from any source with the same confidence.
Common mistakes with lemon juice
- Reading a jug above eye level. A jug read from above looks fuller than it is, so you under-pour. Put the jug on a flat surface and read the meniscus at eye level, or weigh 122 g on a scale instead.
- Measuring a liquid in a dry cup. Dry cups are meant to be filled to the brim and levelled, which spills liquid. Use a liquid jug with a spout, or a scale set to 122 g for 1/2 cup.
- Trusting a splash. A splash is not a measurement. If a recipe gives a weight, use it; if it gives a volume, convert it with the table on this page.
- Forgetting the liquid counts. lemon juice counts towards the total liquid in a recipe, so adding it on top of the full liquid measure makes a batter wet. Use the weight in the recipe, not a guess.
Storage and handling
Refrigerate fresh juice; use within 1 week. Keeping lemon juice stored properly also keeps its weight per cup stable: an ingredient that has absorbed moisture from the air weighs more per cup than a dry one, so good storage is not just about freshness, it is about measurement accuracy too. If a container has been open for months in a humid kitchen, the first thing to do before a precise bake is to weigh the ingredient rather than trusting the cup.
Frequently asked questions
How many grams is 1/2 cup of lemon juice?
1/2 cup of lemon juice weighs 122 g, measured poured according to USDA. That is the figure to use when converting a recipe from cups to grams, and it is the value the conversion table on this page is built on.
How do I measure lemon juice without a scale?
Poured means pouring the ingredient into a liquid measuring jug on a flat surface and reading the level at eye level. Liquids level themselves, so there is no spooning or levelling involved, and the weight follows directly from the volume and the density. That gives the closest result to 122 g per half-cup, but it is still an estimate: the honest answer is that a scale is the only way to know the exact weight, and a basic digital kitchen scale costs less than a bag of good flour.
Is 1/2 cup of lemon juice the same as 122 ml?
Not exactly. A US cup is 236.6 ml, so 1/2 cup is about 118 ml by volume, but lemon juice weighs 122 g, which is slightly more or less than 118 g depending on its density. Volume and weight are only the same for water, which is why recipes written in grams need a weight conversion, not a volume guess.
What is lemon juice used for?
Dressings, marinades, baking and drinks. Freshly squeezed lemon juice, sharp and acidic.
How do I measure lemon juice without a scale?
Pour it into a liquid measuring jug on a flat surface and read the meniscus at eye level at the 1/2-cup line. That is the correct method for liquids, and it is reasonably accurate, but a scale reading 122 g is more reliable, especially for small amounts.
How should I store lemon juice?
Refrigerate fresh juice; use within 1 week. Good storage keeps the ingredient fresh and keeps its weight per cup consistent, because moisture absorbed from the air adds grams that the recipe did not ask for.
Related conversions
Use the liquid volume converter or the cups to grams converter for instant answers, or browse the cups to grams hub for the full ingredient list. Related pages: 1/2 cup water in grams, 1/2 cup vanilla extract in grams, 1/2 cup orange juice in grams. More tools: cups to grams converter, grams to cups converter, recipe scaler. See also our disclaimer about approximate conversions.