One cup of sweetened condensed milk is 306 grams, so converting cups of sweetened condensed milk to grams means multiplying by 306. That factor is specific to this ingredient — it comes from its density, not from any relationship between the two units.
The density behind that figure is 1.2934 g per mL, against 1.00 for water. A cup of water weighs 236.6 g and a cup of sweetened condensed milk weighs 306 g, so this ingredient is 129.3% as heavy as the same volume of water — the single fact the whole page rests on.
A cup of sweetened condensed milk is 306 g when it is measured the standard way, but how it gets into the cup changes the answer: between about 304.5 g and 309.1 g covers the range from lightly spooned to firmly packed. That 1% spread is larger than most of the adjustments recipes fuss over, and it disappears entirely the moment the ingredient is weighed instead.
Grams are the unit this conversion is really for. A domestic scale resolves to a gram, which is 0.327% of a cup of sweetened condensed milk, so weighing gets an accuracy no measuring cup can reach. A 500 g pack of it is 1.634 cups, and a 1 kg pack 3.268.
The condition this weight assumes: The added sugar makes it the densest dairy liquid in a normal kitchen, and sticky enough that scraping the cup out matters.
The formula
cups- The amount of sweetened condensed milk you are converting, in cups
306- Grams per cup for sweetened condensed milk, from its density of 1.2934 g/mL
grams- The equivalent quantity in grams
How it works, step by step
- Enter the quantity in cups.
- It is multiplied by 306, the grams-per-cup figure for sweetened condensed milk.
- The result appears in grams, with a second reading in oz beneath it.
- Use the measure table if you want a standard recipe quantity rather than a number you type in.
Worked examples
1/3 cup of sweetened condensed milk in grams
A recipe calling for 1/3 cup of sweetened condensed milk needs 102 grams on the scale. The arithmetic is 0.333333 × 306 = 102, and halving the recipe halves the weight to 51 grams.
3/4 cup of sweetened condensed milk in grams
A recipe calling for 3/4 cup of sweetened condensed milk needs 229.5 grams on the scale. The arithmetic is 0.75 × 306 = 229.5, and halving the recipe halves the weight to 114.75 grams.
3 cup of sweetened condensed milk in grams
Take 3 cup of sweetened condensed milk: 3 × 306 gives 918 grams. Doubling the batch takes it to 1836 grams, because the relationship is a straight proportion once the density is known.
How to read your score
Frequently asked questions
How many grams are in 1 cup of sweetened condensed milk?
One cup of sweetened condensed milk is 306 grams. Half that quantity is 153 grams and double it is 612 grams, so the figure scales straight up and down — there is no offset in this conversion, only the factor.
Why is a cup of sweetened condensed milk not 236 g like water?
Because weight per cup depends on what is in the cup. Sweetened condensed milk has a density of 1.2934 g per mL where water has 1.00, so a cup of it weighs 306 g rather than 236.6 g. That is a difference of 69.4 g per cup, and it is the reason a single volume-to-weight factor cannot be applied to every ingredient.
Does how I measure it change the weight?
Barely. Sweetened condensed milk does not compress, so a cup of it is 306 g however it is poured — within about 1%, which is inside the accuracy of a domestic scale. This is the group where measuring by volume is defensible.
Is a fluid ounce of sweetened condensed milk the same as an ounce?
No. A fluid ounce is a volume — one eighth of a US cup, 29.57 mL — and an ounce is a weight. One fluid ounce of sweetened condensed milk weighs 1.349 oz, so the two readings differ by 34.9%. They coincide only for something with the density of water, and then only roughly.
Is this a US cup or a metric cup?
US customary: 236.59 mL, which is the cup every US recipe means. A metric cup is 250 mL, so the same cup of sweetened condensed milk would weigh 323.35 g instead of 306 g — 17.3 g more, or 5.67%. Australian and some European recipes use the metric cup, and the difference is large enough to matter in baking.
Do I need a scale for this, or will measuring cups do?
A scale, if the result matters. Volume measuring carries a spread of about 1% for sweetened condensed milk — roughly 3.06 g on a 306 g cup — while a domestic scale is accurate to a gram or two. For anything where the ratio of ingredients drives the outcome, bread and pastry above all, weigh it.
How many cups of sweetened condensed milk is 500 g?
500 g of sweetened condensed milk is 1.634 cups — 0.00326797 cups to one gram, so 500 × 0.00326797 = 1.634. Going that way is a division by 306, or a multiplication by 0.00326797 if you prefer.
Sweetened condensed milk in cups and grams
| Cups | Grams | Unrounded |
|---|---|---|
| 1/8 cup | 38.25 g | 38.25 |
| 1/4 cup | 76.5 g | 76.5 |
| 1/3 cup | 102 g | 102 |
| 1/2 cup | 153 g | 153 |
| 2/3 cup | 204 g | 204 |
| 3/4 cup | 229.5 g | 229.5 |
| 1 cup | 306 g | 306 |
| 1 1/2 cup | 459 g | 459 |
| 2 cup | 612 g | 612 |
| 3 cup | 918 g | 918 |
| 4 cup | 1224 g | 1224 |
Based on 306 g per cup of sweetened condensed milk. One cup of sweetened condensed milk is 306 grams.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 306 g | 10.8 oz | 236.6 mL |
| 3/4 cup | 229.5 g | 8.1 oz | 177.4 mL |
| 2/3 cup | 204 g | 7.2 oz | 157.7 mL |
| 1/2 cup | 153 g | 5.4 oz | 118.3 mL |
| 1/3 cup | 102 g | 3.6 oz | 78.86 mL |
| 1/4 cup | 76.5 g | 2.7 oz | 59.15 mL |
| 1 tbsp | 19.12 g | 0.675 oz | 14.79 mL |
| 1 tsp | 6.375 g | 0.225 oz | 4.929 mL |
US customary measures: 1 cup = 236.59 mL, 1 tbsp = 14.79 mL, 1 tsp = 4.93 mL.
| Ingredient | Grams per cup | Ounces per cup | Density (g/mL) |
|---|---|---|---|
| Orange juice | 248 g | 8.748 oz | 1.048 |
| Evaporated milk | 252 g | 8.889 oz | 1.065 |
| Peanut butter | 258 g | 9.101 oz | 1.091 |
| Sweetened condensed milk (this page) | 306 g | 10.79 oz | 1.293 |
| Maple syrup | 322 g | 11.36 oz | 1.361 |
| Corn syrup | 328 g | 11.57 oz | 1.386 |
| Agave nectar | 331 g | 11.68 oz | 1.399 |
Ordered by weight. The spread across this group is why a single generic cups-to-grams factor cannot work.