500 Ml in Litres
500 ml is 0.5 litres. Half a litre is the simplest conversion in this whole series, because the metric system is built on tens: 500 ml is exactly 0.5 litres, with no rounding and no dispute. Even so, cooks still search for it, usually because a recipe gives millilitres and a jug is marked in litres, or the other way round. This page confirms the figure and shows how it behaves in real recipes, from halving a litre of stock to scaling a sauce.
Why this conversion exists
Millilitres, cups, tablespoons, teaspoons, ounces and grams are all units for the same things, volume or weight, and the conversion between two units of the same kind is exact. One US cup is 236.59 ml, one tablespoon is 14.79 ml, one teaspoon is 4.93 ml, one ounce is 28.35 g and one pound is 453.59 g, and those definitions do not change between sources. The confusion comes from the other system: the metric cup is 250 ml, the metric tablespoon is 15 ml and the imperial pint is 568 ml, so a recipe's origin decides which cup it means. This page uses the US customary figures throughout, because that is the system American recipes are written in, and it says so wherever the metric figure differs. The tables below give the conversion for the amounts recipes actually ask for, and the worked examples show it in the dishes where it actually appears.
500 Ml in Litres conversion table
| Ml | Litres |
|---|---|
| 100 ml | 0.1 litres |
| 250 ml | 0.25 litres |
| 500 ml | 0.5 litres |
| 750 ml | 0.75 litres |
| 1000 ml | 1 litre |
| 1500 ml | 1.5 litres |
| 2000 ml | 2 litres |
The table covers the amounts recipes actually ask for. One ml is 0.001 litres, and every row is that factor multiplied by the amount in the first column, so the table is exact to the rounding shown. Where the conversion is exact, like 2 cups to 1 pint, the table says so in whole numbers; where it is rounded, like 500 ml to 2.11 cups, the unrounded value is close enough that the difference is smaller than the error in any cup measure.
The reverse conversion
The table above converts in the direction this page is about. The table below converts back, so a recipe written in the other unit converts just as easily, and the two tables together cover every direction a cook is likely to need.
| Litres | Ml |
|---|---|
| 0.25 litres | 250 ml |
| 0.5 litres | 500 ml |
| 1 litre | 1000 ml |
| 2 litres | 2000 ml |
Worked examples
Tomato soup calling for 500 ml
A tomato soup recipe that calls for 500 ml needs 0.5 litres. Soup is forgiving about a few millilitres either way, but the stock concentration still sets the flavour, so measuring the liquid properly matters more than it looks. If the recipe is a bake, weigh the liquid on a scale instead, because a jug reading is only as accurate as the jug's markings. That is the figure to measure: 500 ml in the units the recipe uses, or 0.5 litres in the units your jug or scale shows. Because the conversion is exact, the only error that can creep in is the measuring itself, so the tool matters more than the arithmetic. A recipe that calls for 500 ml and gets 0.5 litres will behave exactly as written, and a recipe that gets a rounded figure will behave almost exactly as written, which is close enough for cooking and usually close enough for baking too.
Pancake batter calling for 1000 ml
A pancake batter recipe that calls for 1000 ml needs 1 litre. Pancake batter is sensitive to its liquid: too much and the pancakes spread thin and pale, too little and they turn thick and doughy in the middle. A standard measuring jug holds this amount with room to spare, so there is no need to fill it to the brim. That is the figure to measure: 1000 ml in the units the recipe uses, or 1 litre in the units your jug or scale shows. Because the conversion is exact, the only error that can creep in is the measuring itself, so the tool matters more than the arithmetic. A recipe that calls for 1000 ml and gets 1 litre will behave exactly as written, and a recipe that gets a rounded figure will behave almost exactly as written, which is close enough for cooking and usually close enough for baking too.
Vanilla custard calling for 250 ml
A vanilla custard recipe that calls for 250 ml needs 0.25 litres. Custard is a ratio dish, and the milk is the biggest part of that ratio, so an error in the liquid shows up as a custard that is either runny or rubbery. Pour it into a jug on a flat surface and read the meniscus at eye level, which is more accurate than any cup measure. That is the figure to measure: 250 ml in the units the recipe uses, or 0.25 litres in the units your jug or scale shows. Because the conversion is exact, the only error that can creep in is the measuring itself, so the tool matters more than the arithmetic. A recipe that calls for 250 ml and gets 0.25 litres will behave exactly as written, and a recipe that gets a rounded figure will behave almost exactly as written, which is close enough for cooking and usually close enough for baking too.
Scaling the recipe up and down
Scaling works the same way in both directions, because the conversion is exact. Double the recipe and 500 ml becomes 1000 ml, which is 1 litre. Halve it and you need 250 ml, which is 0.25 litres. When you scale, always do the arithmetic before you start measuring, and scale by the same factor in both units, because scaling mid-recipe is how errors creep in. Remember that a US cup is 236.59 ml while a metric cup is 250 ml: if the recipe comes from Australia, New Zealand or South Africa, one cup means 250 ml, and the figures on this page need adjusting by that 6 percent. Check which cup your recipe uses before you convert, and when the recipe really matters, weigh the ingredient on a scale, because grams do not change with the cup.
How the conversion is defined
The figures on this page are exact standard conversions, not measured densities, so there is no dispute to report and no laboratory to cite. One US customary cup is 236.59 ml by definition, one tablespoon is 14.79 ml, one teaspoon is 4.93 ml, one ounce is 28.35 g and one pound is 453.59 g. These are definitions of the units themselves, so they do not vary between sources the way ingredient densities do. The only judgement on this page is rounding: the tables give one or two decimal places, and the headline answers are rounded to the figure a cook can actually use. Where a conversion is exact, like 2 cups to 1 pint, the table says so. Where it is rounded, like 500 ml to 2.11 cups, the unrounded value is close enough that the difference is smaller than the error in any cup measure.
US cups versus metric cups
The conversion on this page uses the US customary cup, which is 236.59 ml. The metric cup used in Australia, New Zealand and South Africa is 250 ml, and the old imperial cup is 284 ml, so the same recipe can mean three different amounts depending on where it was written. A US recipe almost always means the 236.59 ml cup, while a recipe from Australia or New Zealand usually means the 250 ml metric cup. The difference is about 6 percent, which is small enough to ignore in a soup and big enough to notice in a cake: a cake that calls for two cups of milk needs 473 ml in US measures and 500 ml in metric measures, a gap of 27 ml. When a recipe does not say which cup it uses, look at its other units: grams and millilitres point to a metric recipe, while ounces and Fahrenheit point to an American one. And when the recipe really matters, convert by weight on a scale, because grams do not change with the cup.
Common mistakes
- Using a dry cup for a liquid. Dry cups are meant to be filled to the brim and levelled, which is wrong for a liquid. Use a jug with a spout and clear markings, and read the meniscus at eye level on a flat surface.
- Reading the jug from above. A jug read from above looks fuller than it is, because the meniscus curves up at the edges. Set the jug down, crouch to eye level and read the bottom of the curve.
- Confusing the US cup with the metric cup. A US cup is 236.59 ml and a metric cup is 250 ml, a difference of about 6 percent. A recipe from Australia or New Zealand almost always means the metric cup, so check the recipe's origin before converting.
- Rounding too early. Rounding 2.11 cups to 2 cups is fine in a soup but not in a cake, where the missing 26 ml is a real part of the batter. Convert first, round last, and only round when the recipe can absorb the difference.
Practical guidance
In practice, the millilitre column is the one to trust whenever a recipe gives you a choice, because a jug is marked in millilitres and a cup is not. Pour the liquid into the jug on a flat surface, crouch to eye level and read the bottom of the meniscus, which is the curved surface of the liquid, rather than the edges that climb the side of the jug. If the jug is marked in both millilitres and cups, use the millilitre side, because the cup markings on cheap jugs are often approximate. When a recipe calls for a volume that falls between two markings, pour to the nearer one and adjust by eye: the difference of a few millilitres will not change a soup, a sauce or a smoothie. It will change a custard or a sponge, so for baking, weigh the liquid on a scale instead, using the gram column where this page gives one, or the knowledge that a millilitre of water weighs a gram. And remember that a hot liquid expands slightly, so let stock or milk cool for a minute before measuring it, or measure it cold and heat it afterwards.
Frequently asked questions
Can I round 0.5 litres to a simpler number?
Usually, yes, in cooking. Rounding 0.5 litres to the nearest round number is safe in a soup, a sauce, a stew or a smoothie, where a few millilitres or grams either way will not change the result. In baking, round less freely: a cake, a custard or a bread depends on its ratios, and the rounded figure is a real change to the recipe. Convert first, round last, and only round when the recipe can absorb the difference.
What is 1 ml in litres?
One ml is 0.001 litres. That is the unit factor the whole table on this page is built on, and it is the number to use if you need to convert an amount that is not in the table. Multiply the amount you have by that factor and you get the amount you need, in the units the recipe asks for.
How many 500 ml are in double the recipe?
Double the recipe and 500 ml becomes 1000 ml, which is 1 litre. Halve it and you need 250 ml, which is 0.25 litres. When you scale a recipe, scale by the same factor in both units, and do the arithmetic before you start measuring, because scaling mid-recipe is how errors creep in.
Why do American and metric recipes disagree about this amount?
Because the two systems define their units differently: the US cup is 236.59 ml while the metric cup is 250 ml, the US tablespoon is 14.79 ml while the metric tablespoon is 15 ml, and the US pint is 473 ml while the imperial pint is 568 ml. A recipe from the United States almost always means the US figures, while a recipe from Australia or New Zealand usually means the metric ones. Check the recipe's origin, and its other units, before converting.
How many litres is 500 ml?
500 ml is 0.5 litres. That is the headline figure for this page, and the table above lists the same conversion for the amounts around it, from the smallest to the largest. The figure is exact where the conversion is a matter of definition, and rounded to one or two decimal places where it is not, so the value you use in the kitchen is the value in the table.
Related conversions
Use the cups to millilitres converter, millilitres to cups converter, liquid volume converter for instant answers, or browse the units hub for every conversion on this site. Nearby pages in this series: 100 ml in cups, 250 ml in litres, 100 ml in tablespoons. See also our disclaimer about approximate conversions and about CookScale for how our figures are sourced.